/411 Technician Study Mode (2022-2026) Online practice test for the U.S. ham radio technician license exam. 1 / 411 Which of the following can reduce overload of a VHF transceiver by a nearby commercial FM station? Installing bypass capacitors on the microphone cable Using double-shielded coaxial cable Installing an RF preamplifier Installing a band-reject filter 2 / 411 Which of the following is standard practice when you participate in a net? When first responding to the net control station, transmit your call sign, name, and address as in the FCC database Unless you are reporting an emergency, transmit only when directed by the net control station Record the time of each of your transmissions All these choices are correct 3 / 411 What is the unit of frequency? Hertz Tesla Farad Henry 4 / 411 Where should an RF power meter be installed? At the power supply output In the power supply cable, as close as possible to the radio In parallel with the push-to-talk line and the antenna In the feed line, between the transmitter and antenna 5 / 411 What are the names for the electrodes of a diode? Gate and base Anode and cathode Plus and minus Source and drain 6 / 411 Which of the following entities recommends transmit/receive channels and other parameters for auxiliary and repeater stations? Volunteer Frequency Coordinator recognized by local amateurs FCC Regional Field Office International Telecommunication Union Frequency Spectrum Manager appointed by the FCC 7 / 411 Which of the following can provide power gain? Reactor Transistor Resistor Transformer 8 / 411 Which of the following is a digital communications mode? Packet radio FT8 IEEE 802.11 All these choices are correct 9 / 411 What electrical component is used to protect other circuit components from current overloads? Thyratron Fuse Varactor All these choices are correct 10 / 411 Which term describes the rate at which electrical energy is used? Power Current Voltage Resistance 11 / 411 Which of the following increases the resonant frequency of a dipole antenna? Shortening it Lengthening it Adding capacitive loading to the ends of the radiating wires Inserting coils in series with radiating wires 12 / 411 What is the definition of third party communications? A message from a control operator to another amateur station control operator on behalf of another person Temporary authorization for an unlicensed person to transmit on the amateur bands for technical experiments Operation when the transmitting equipment is licensed to a person other than the control operator Amateur radio communications where three stations are in communications with one another 13 / 411 What may happen if the FCC is unable to reach you by email? Revocation of the station license or suspension of the operator license Revocation of access to the license record in the FCC system Nothing; there is no such requirement Fine and suspension of operator license 14 / 411 For which license classes are new licenses currently available from the FCC? Novice, Technician Plus, General, Advanced Technician, General, Amateur Extra Technician, Technician Plus, General, Amateur Extra Novice, Technician, General, Amateur Extra 15 / 411 Where should a lightning arrester be installed in a coaxial feed line? At the output connector of a transceiver At the ac power service panel At the antenna feed point On a grounded panel near where feed lines enter the building 16 / 411 What are the units of electrical resistance? Coulombs Mhos Ohms Siemens 17 / 411 What is the electrical difference between RG-58 and RG-213 coaxial cable? There is no significant difference between the two types RG-58 cable has two shields RG-213 cable has less loss at a given frequency RG-58 cable can handle higher power levels 18 / 411 What electrical component stores energy in an electric field? Diode Inductor Capacitor Varistor 19 / 411 When must the station and its records be available for FCC inspection? At any time ten days after notification by the FCC of such an inspection At any time upon request by an FCC representative At any time after written notification by the FCC of such inspection Only when presented with a valid warrant by an FCC official or government agent 20 / 411 Why do most solid-state transmitters reduce output power as SWR increases beyond a certain level? To protect the output amplifier transistors To comply with FCC rules on spectral purity Because power supplies cannot supply enough current at high SWR To lower the SWR on the transmission line 21 / 411 What type of current flow is opposed by resistance? Direct current Alternating current All these choices are correct RF current 22 / 411 What determines the transmitting frequency privileges of an amateur station? The frequencies printed on the license grant The frequency authorized by the frequency coordinator The highest class of operator license held by anyone on the premises The class of operator license held by the control operator 23 / 411 What should be done to all external ground rods or earth connections? Bond them together with heavy wire or conductive strap Keep them as far apart as possible Waterproof them with silicone caulk or electrical tape Tune them for resonance on the lowest frequency of operation 24 / 411 What is the velocity of a radio wave traveling through free space? Speed of sound Speed that increases as the frequency increases Speed inversely proportional to its wavelength Speed of light 25 / 411 Who may select a desired call sign under the vanity call sign rules? Only a licensed amateur with an Amateur Extra Class license Only a licensed amateur who has been licensed continuously for more than 10 years Only a licensed amateur with a General or Amateur Extra Class license Any licensed amateur 26 / 411 What reading indicates that an ohmmeter is connected across a large, discharged capacitor? Steady full-scale reading Decreasing resistance with time Increasing resistance with time Alternating between open and short circuit 27 / 411 What is the function of the SSB/CW-FM switch on a VHF power amplifier? Set the amplifier for proper operation in the selected mode Change the mode of the transmitted signal Change the frequency range of the amplifier to operate in the proper segment of the band Reduce the received signal noise 28 / 411 How often must you identify with your FCC-assigned call sign when using tactical call signs such as "Race Headquarters"? At the end of each communication and every ten minutes during a communication Never, the tactical call is sufficient At the end of every transmission Once during every hour 29 / 411 Which of the following are provided by satellite tracking programs? The apparent frequency of the satellite transmission, including effects of Doppler shift The time, azimuth, and elevation of the start, maximum altitude, and end of a pass All these choices are correct Maps showing the real-time position of the satellite track over Earth 30 / 411 What is CW? A type of electromagnetic propagation A technique for coil winding Another name for a Morse code transmission A digital mode used primarily on 2 meter FM 31 / 411 What is a disadvantage of the short, flexible antenna supplied with most handheld radio transceivers, compared to a full-sized quarter-wave antenna? It is mechanically fragile It has low efficiency All these choices are correct It transmits only circularly polarized signals 32 / 411 What is a "talkgroup" on a DMR repeater? A way for groups of users to share a channel at different times without hearing other users on the channel A group of operators sharing common interests A net that meets at a specified time A protocol that increases the signal-to-noise ratio when multiple repeaters are linked together 33 / 411 Which of the following should be considered when selecting an accessory SWR meter? All these choices are correct The frequency and power level at which the measurements will be made The distance that the meter will be located from the antenna The types of modulation being used at the station 34 / 411 Which is a proper grounding method for a tower? A connection between the tower base and a cold water pipe Separate eight-foot ground rods for each tower leg, bonded to the tower and each other A single four-foot ground rod, driven into the ground no more than 12 inches from the base A ferrite-core RF choke connected between the tower and ground 35 / 411 What is an appropriate way to call another station on a repeater if you know the other station's call sign? Say "CQ" three times, then the other station's call sign Say "break, break," then say the station's call sign Wait for the station to call CQ, then answer Say the station's call sign, then identify with your call sign 36 / 411 Which instrument would you use to measure electric potential? A wavemeter An ohmmeter A voltmeter An ammeter 37 / 411 Which of the following actions can reduce exposure to RF radiation? Relocate antennas Relocate the transmitter Increase the duty cycle All these choices are correct 38 / 411 Which of the following can be used to enter a transceiver's operating frequency? All these choices are correct The Automatic Frequency Control The keypad or VFO knob The CTCSS or DTMF encoder 39 / 411 Which is true about forward voltage drop in a diode? It indicates that the diode is defective It is lower in some diode types than in others It has no impact on the voltage delivered to the load It is proportional to peak inverse voltage 40 / 411 What is the purpose of the color code used on DMR repeater systems? Identifies the codec used Defines the frequency pair to use Must match the repeater color code for access Defines the minimum signal level required for access 41 / 411 What is a disadvantage of air core coaxial cable when compared to foam or solid dielectric types? It has more loss per foot It cannot be used at below freezing temperatures It requires special techniques to prevent moisture in the cable It cannot be used for VHF or UHF antennas 42 / 411 With which countries are FCC-licensed amateur radio stations prohibited from exchanging communications? Any country whose administration has notified the International Telecommunication Union (ITU) that it objects to such communications Any country banned from such communications by the International Amateur Radio Union (IARU) Any country banned from making such communications by the American Radio Relay League (ARRL) Any country whose administration has notified the American Radio Relay League (ARRL) that it objects to such communications 43 / 411 Which of the following VHF/UHF band segments are limited to CW only? 50.0 MHz to 50.1 MHz and 144.0 MHz to 144.1 MHz All these choices are correct 902.0 MHz to 902.1 MHz 219 MHz to 220 MHz and 420.0 MHz to 420.1 MHz 44 / 411 What hazard is caused by charging or discharging a battery too quickly? Overheating or out-gassing Excess output ripple Half-wave rectification Inverse memory effect 45 / 411 Which of the following devices or circuits changes an alternating current into a varying direct current signal? Rectifier Transformer Amplifier Reflector 46 / 411 How are the transceiver audio input and output connected in a station configured to operate using FT8? To a computer running a terminal program and connected to a terminal node controller unit To a computer connected to the FT8converter.com website To an FT8 conversion unit, a keyboard, and a computer monitor To the audio input and output of a computer running WSJT-X software 47 / 411 What does an SWR reading of 4:1 indicate? Gain of +4 dB Loss of -4 dB Good impedance match Impedance mismatch 48 / 411 What hazard exists in a power supply immediately after turning it off? Voltage transients from kickback diodes Charge stored in filter capacitors Circulating currents in the dc filter Leakage flux in the power transformer 49 / 411 Under what circumstances is it safe to climb a tower without a helper or observer? Never When no mechanical work is being performed When the work being done is not more than 20 feet above the ground When no electrical work is being performed 50 / 411 In the United States, what circuit does black wire insulation indicate in a three-wire 120 V cable? Hot Equipment ground Neutral Black insulation is never used 51 / 411 What property of a radio wave defines its polarization? The orientation of the magnetic field The ratio of the velocity to the wavelength The orientation of the electric field The ratio of the energy in the magnetic field to the energy in the electric field 52 / 411 What is a way to enable quick access to a favorite frequency or channel on your transceiver? Use the scan mode to select the desired frequency Enable the VOX Enable the frequency offset Store it in a memory channel 53 / 411 Which of the following is a good electrical insulator? Glass Mercury Aluminum Copper 54 / 411 Which of the following describes combining speech with an RF carrier signal? Modulation Low-pass filtering Impedance matching Oscillation 55 / 411 What formula is used to calculate current in a circuit? I = E - R I = E + R I = E - R I = E / R 56 / 411 What is an ARQ transmission system? A special transmission format limited to video signals A method of compressing data using autonomous reiterative Q codes prior to final encoding A system used to encrypt command signals to an amateur radio satellite An error correction method in which the receiving station detects errors and sends a request for retransmission 57 / 411 Which of the following is a disadvantage of FM compared with single sideband? All these choices are correct FM signals are harder to tune Voice quality is poorer Only one signal can be received at a time 58 / 411 What is the purpose of a squelch function? Reduce a CW transmitter's key clicks Reduce interference from impulse noise Mute the receiver audio when a signal is not present Eliminate parasitic oscillations in an RF amplifier 59 / 411 What is the meaning of the procedural signal "CQ"? Call on the quarter hour Test transmission, no reply expected Calling any station Only the called station should transmit 60 / 411 What is a benefit of low SWR? All these choices are correct Less antenna wear Reduced signal loss Reduced television interference 61 / 411 Which of the following is an acceptable method to determine whether your station complies with FCC RF exposure regulations? By calculation based on computer modeling By measurement of field strength using calibrated equipment By calculation based on FCC OET Bulletin 65 All these choices are correct 62 / 411 What would cause a broadcast AM or FM radio to receive an amateur radio transmission unintentionally? The microphone gain of the transmitter is turned up too high The receiver is unable to reject strong signals outside the AM or FM band The audio amplifier of the transmitter is overloaded The deviation of an FM transmitter is set too low 63 / 411 What is the approximate length, in inches, of a quarter-wavelength vertical antenna for 146 MHz? 50 112 12 19 64 / 411 What is the primary purpose of a dummy load? To improve the signal-to-noise ratio of a receiver To prevent transmitting signals over the air when making tests To prevent over-modulation of a transmitter To improve the efficiency of an antenna 65 / 411 What proves that the FCC has issued an operator/primary license grant? All these choices are correct A printed copy of the certificate of successful completion of examination An email notification from the NCVEC granting the license The license appears in the FCC ULS database 66 / 411 Which of these components can be used as an electronic switch? Varistor Thermistor Potentiometer Transistor 67 / 411 Which amateurs may contact the International Space Station (ISS) on VHF bands? Any amateur holding a General class or higher license Any amateur holding a Technician class or higher license who has applied for and received approval from NASA Any amateur holding a Technician class or higher license Any amateur holding a General class or higher license who has applied for and received approval from NASA 68 / 411 What is the resistance of a circuit in which a current of 3 amperes flows when connected to 90 volts? 3 ohms 93 ohms 30 ohms 270 ohms 69 / 411 What is the voltage across a 2-ohm resistor if a current of 0.5 amperes flows through it? 0.25 volts 1.5 volts 1 volt 2.5 volts 70 / 411 What component changes 120 V AC power to a lower AC voltage for other uses? Diode Transformer Variable capacitor Transistor 71 / 411 How much power is delivered by a voltage of 13.8 volts DC and a current of 10 amperes? 138 watts 3.8 watts 23.8 watts 0.7 watts 72 / 411 When is willful interference to other amateur radio stations permitted? To stop another amateur station that is breaking the FCC rules At no time At any time, stations in the Amateur Radio Service are not protected from willful interference When making short test transmissions 73 / 411 What is the effect of fog and rain on signals in the 10 meter and 6 meter bands? Deflection Absorption There is little effect Range increase 74 / 411 Which of the following is a source of loss in coaxial feed line? Multiple connectors in the line All these choices are correct Water intrusion into coaxial connectors High SWR 75 / 411 Which of the following describes a type of antenna loading? Strengthening the radiating elements of a beam antenna to better resist wind damage Inserting a resistor in the radiating portion of the antenna to make it resonant Installing a spring in the base of a mobile vertical antenna to make it more flexible Electrically lengthening by inserting inductors in radiating elements 76 / 411 Which of the following is a way to determine whether your satellite uplink power is neither too low nor too high? All these choices are correct Check your signal strength report in the telemetry data Listen for distortion on your downlink signal Your signal strength on the downlink should be about the same as the beacon 77 / 411 What is the resistance of a circuit that draws 4 amperes from a 12-volt source? 48 ohms 8 ohms 16 ohms 3 ohms 78 / 411 What health hazard is presented by electrical current flowing through the body? All these choices are correct It may cause injury by heating tissue It may cause involuntary muscle contractions It may disrupt the electrical functions of cells 79 / 411 Which of the following must be programmed into a D-STAR digital transceiver before transmitting? All these choices are correct Your call sign Your output power The codec type being used 80 / 411 What type of amateur station simultaneously retransmits the signal of another amateur station on a different channel or channels? Earth station Beacon station Message forwarding station Repeater station 81 / 411 What electrical component is typically constructed as a coil of wire? Switch Diode Capacitor Inductor 82 / 411 What type of transmission is indicated by the term "NTSC?" A frame compression scheme for TV signals A Normal Transmission mode in Static Circuit A special mode for satellite uplink An analog fast-scan color TV signal 83 / 411 Which of the following receiver filter bandwidths provides the best signal-to-noise ratio for SSB reception? 2400 Hz 500 Hz 5000 Hz 1000 Hz 84 / 411 What is the function of a transceiver's PTT input? Switches transceiver from receive to transmit when grounded Provides a transmit tuning tone when grounded Input for a preamplifier tuning tone Input for a key used to send CW 85 / 411 How many operator/primary station license grants may be held by any one person? No more than two One for each permanent station location from which the person plans to operate One One for each band on which the person plans to operate 86 / 411 What is component 2 in figure T-1? Resistor Indicator lamp Transistor Connector 87 / 411 What signals are used in a computer-radio interface for digital mode operation? Antenna and RF power Receive audio, transmit audio, and transmitter keying Receive and transmit mode, status, and location NMEA GPS location and DC power 88 / 411 Who does the FCC presume to be the control operator of an amateur station, unless documentation to the contrary is in the station records? The station custodian The person operating the station equipment The station licensee The third party participant 89 / 411 How should you respond to a station calling CQ? Transmit the other station's call sign followed by your call sign Transmit your call sign followed by the other station's call sign Transmit a signal report followed by your call sign Transmit "CQ" followed by the other station's call sign 90 / 411 Which of the following is used to determine if an antenna is resonant at the desired operating frequency? A frequency counter A Q meter A VTVM An antenna analyzer 91 / 411 Which of the following describes a linked repeater network? A network of repeaters in which signals received by one repeater are transmitted by all the repeaters in the network A system of repeaters linked by APRS Multiple repeaters with the same control operator A single repeater with more than one receiver 92 / 411 Which is equal to 2425 MHz? 2425 GHz 24.25 GHz 2.425 GHz 0.002425 GHz 93 / 411 Where should the negative power return of a mobile transceiver be connected in a vehicle? To any metal part of the vehicle At the antenna mount Through the transceiver's mounting bracket At the 12 volt battery chassis ground 94 / 411 What is meant by the statement that a satellite is operating in U/V mode? The satellite operates using ultraviolet frequencies The satellite uplink is in the 70 centimeter band and the downlink is in the 2 meter band The satellite uplink is in the 15 meter band and the downlink is in the 10 meter band The satellite frequencies are usually variable 95 / 411 What is a beam antenna? An antenna that reverses the phase of received signals An omnidirectional antenna invented by Clarence Beam An antenna that concentrates signals in one direction An antenna built from aluminum I-beams 96 / 411 How is a specific group of stations selected on a digital voice transceiver? By enabling the group's CTCSS tone By entering the group's identification code By retrieving the frequencies from transceiver memory By activating automatic identification 97 / 411 How can you determine the length of time that equipment can be powered from a battery? Multiply the watts per hour consumed by the equipment by the battery power rating Divide the battery ampere-hour rating by the average current draw of the equipment Divide the watt-hour rating of the battery by the peak power consumption of the equipment Multiply the square of the current rating of the battery by the input resistance of the equipment 98 / 411 What does the abbreviation FET stand for? Fast Electron Transistor Free Electron Transmitter Frequency Emission Transmitter Field Effect Transistor 99 / 411 What is the function of an SPDT switch? A single circuit is switched between one of two other circuits Two circuits are each switched between one of two other circuits Two circuits are opened or closed A single circuit is opened or closed 100 / 411 What frequency range is referred to as HF? 300 to 3000 kHz 300 to 3000 MHz 3 to 30 MHz 30 to 300 MHz 101 / 411 What is required before using the EchoLink system? Register your call sign and provide proof of license Purchase a license to use the EchoLink software Complete the required EchoLink training All these choices are correct 102 / 411 What happens as the frequency of a signal in coaxial cable is increased? The loss increases The loss decreases The characteristic impedance increases The characteristic impedance decreases 103 / 411 Which of the following can cause radio frequency interference? Harmonics Fundamental overload Spurious emissions All these choices are correct 104 / 411 Where is an RF preamplifier installed? Between the transmitter and the antenna tuner Between the antenna and receiver At the output of the receiver audio amplifier At the output of the transmitter power amplifier 105 / 411 Which of the following types of feed line has the lowest loss at VHF and UHF? 50-ohm flexible coax Air-insulated hardline Multi-conductor unbalanced cable 75-ohm flexible coax 106 / 411 What is a relay? A pass transistor An electrically-controlled switch An inverting amplifier A current controlled amplifier 107 / 411 What does the abbreviation "RF" mean? The real frequency transmitted as opposed to the apparent frequency Radio frequency signals of all types Reflective force in antenna transmission lines The resonant frequency of a tuned circuit 108 / 411 What is the approximate bandwidth required to transmit a CW signal? 2.4 kHz 150 Hz 1000 Hz 15 kHz 109 / 411 Which of the following precautions should be taken when measuring in-circuit resistance with an ohmmeter? Ensure that the circuit is operating at the correct frequency Ensure that the circuit is grounded Ensure that the applied voltages are correct Ensure that the circuit is not powered 110 / 411 Where should a fuse or circuit breaker be installed in a 120V AC power circuit? In parallel with the hot conductor only In series with the hot and neutral conductors In parallel with the hot and neutral conductors In series with the hot conductor only 111 / 411 What is Doppler shift in reference to satellite communications? A mode where the satellite receives signals on one band and transmits on another A special digital communications mode for some satellites A change in the satellite orbit An observed change in signal frequency caused by relative motion between the satellite and Earth station 112 / 411 Which of the following are typical duties of a Net Control Station? Call the net to order and direct communications between stations checking in Ensure that all stations checking into the net are properly licensed for operation on the net frequency All these choices are correct Choose the regular net meeting time and frequency 113 / 411 What is a satellite beacon? A transmission from a satellite that contains status information The primary transmit antenna on the satellite A reflective surface on the satellite An indicator light that shows where to point your antenna 114 / 411 What is the abbreviation for kilohertz? khz kHz KHZ khZ 115 / 411 What describes the number of times per second that an alternating current makes a complete cycle? Frequency Pulse rate Wavelength Speed 116 / 411 Which type of voice mode is often used for long-distance (weak signal) contacts on the VHF and UHF bands? DRM PM FM SSB 117 / 411 Why do VHF signal strengths sometimes vary greatly when the antenna is moved only a few feet? All these choices are correct Multipath propagation cancels or reinforces signals The signal path encounters different concentrations of water vapor VHF ionospheric propagation is very sensitive to path length 118 / 411 What is the unit of impedance? The volt The ampere The coulomb The ohm 119 / 411 What is the name of an electrical wiring diagram that uses standard component symbols? Schematic Flow chart Connector pinout Bill of materials 120 / 411 What is the purpose of a safety wire through a turnbuckle used to tension guy lines? Provide an ability to measure for proper tensioning Provide a ground path for lightning strikes Prevent loosening of the turnbuckle from vibration Secure the guy line if the turnbuckle breaks 121 / 411 What is a good way to guard against electrical shock at your station? Connect all AC powered station equipment to a common safety ground Install mechanical interlocks in high-voltage circuits All these choices are correct Use three-wire cords and plugs for all AC powered equipment 122 / 411 Why should the outer jacket of coaxial cable be resistant to ultraviolet light? Ultraviolet light can increase losses in the cable's jacket Ultraviolet resistant jackets prevent harmonic radiation Ultraviolet light can damage the jacket and allow water to enter the cable Ultraviolet and RF signals can mix, causing interference 123 / 411 What information is contained in the preamble of a formal traffic message? The email address of the originating station The address of the intended recipient Information needed to track the message The telephone number of the addressee 124 / 411 What is RACES? A radio contest held in a short period, sometimes called a “sprint†An international radio experimentation society An FCC part 97 amateur radio service for civil defense communications during national emergencies An emergency organization combining amateur radio and citizens band operators and frequencies 125 / 411 How is the cathode lead of a semiconductor diode often marked on the package? With the letter K With the letter C With the word "cathode" With a stripe 126 / 411 How much current is required to deliver 120 watts at a voltage of 12 volts DC? 10 amperes 132 amperes 12 amperes 0.1 amperes 127 / 411 How is a VHF/UHF transceiver's "reverse" function used? To increase power output To reduce power output To listen on a repeater's input frequency To listen on a repeater's output frequency 128 / 411 Which of the following is a characteristic of good traffic handling? Passing messages exactly as received Making decisions as to whether messages are worthy of relay or delivery Ensuring that any newsworthy messages are relayed to the news media All these choices are correct 129 / 411 What is a LEO satellite? A sun synchronous satellite A highly elliptical orbit satellite A satellite in low energy operation mode A satellite in low earth orbit 130 / 411 What is an amateur station's control point? The location of the station's transmitting antenna The location at which the control operator function is performed The location of the station's transmitting apparatus The mailing address of the station licensee 131 / 411 Why is coaxial cable the most common feed line for amateur radio antenna systems? It has less loss than any other type of feed line It can handle more power than any other type of feed line It is easy to use and requires few special installation considerations It is less expensive than any other type of feed line 132 / 411 Which Q signal indicates that you are changing frequency? QRZ QRU QSL QSY 133 / 411 What causes a light-emitting diode (LED) to emit light? Capacitively-coupled RF signal Forward current Inductively-coupled RF signal Reverse current 134 / 411 What is the normal term for an FCC-issued amateur radio license? Five years Life Ten years Eight years 135 / 411 What is the Radio Amateur Civil Emergency Service (RACES)? An emergency service using amateur operators certified by a civil defense organization as being enrolled in that organization A radio service using amateur stations for emergency management or civil defense communications A radio service using amateur frequencies for emergency management or civil defense communications All these choices are correct 136 / 411 Which of the following is required when making on-the-air test transmissions? Identify the transmitting station All these choices are correct Notify the FCC of the transmissions Conduct tests only between 10 p.m. and 6 a.m. local time 137 / 411 What is the approximate bandwidth of a VHF repeater FM voice signal? Less than 500 Hz Between 50 and 125 kHz About 150 kHz Between 10 and 15 kHz 138 / 411 What does the scanning function of an FM transceiver do? Prevents interference to nearby repeaters Checks for messages left on a digital bulletin board Tunes through a range of frequencies to check for activity Checks incoming signal deviation 139 / 411 What is Voice Over Internet Protocol (VoIP)? A technique for measuring the modulation quality of a transmitter using remote sites monitored via the internet A set of rules specifying how to identify your station when linked over the internet to another station A method of delivering voice communications over the internet using digital techniques A technique employed to “spot†DX stations via the internet 140 / 411 Why are simplex channels designated in the VHF/UHF band plans? So stations with simple transmitters can access the repeater without automated offset So stations within range of each other can communicate without tying up a repeater For working DX only For contest operation 141 / 411 Which of the following displays an electrical quantity as a numeric value? Transistor Meter Relay Potentiometer 142 / 411 From which of the following locations may an FCC-licensed amateur station transmit? From within any country that is a member of the United Nations From anywhere within International Telecommunication Union (ITU) Regions 2 and 3 From any vessel or craft located in international waters and documented or registered in the United States From within any country that belongs to the International Telecommunication Union 143 / 411 In which of the following circumstances may the control operator of an amateur station receive compensation for operating that station? When the communication is made to obtain emergency information for a local broadcast station When the communication is incidental to classroom instruction at an educational institution When the communication is related to the sale of amateur equipment by the control operator's employer All these choices are correct 144 / 411 What is an electronic keyer? A device that assists in manual sending of Morse code A device for voice activated switching from receive to transmit A device for switching antennas from transmit to receive An interlock to prevent unauthorized use of a radio 145 / 411 Which of the following components can consist of three regions of semiconductor material? Transistor Alternator Triode Pentagrid converter 146 / 411 What type of circuit controls the amount of voltage from a power supply? Phase inverter Filter Regulator Oscillator 147 / 411 When do FCC rules NOT apply to the operation of an amateur station? When operating under special FEMA rules When operating a RACES station FCC rules always apply When operating under special ARES rules 148 / 411 What hazard is created by touching an antenna during a transmission? Electrocution RF burn to skin All these choices are correct Radiation poisoning 149 / 411 What is the grace period for renewal if an amateur license expires? Ten years Three years Two years Five years 150 / 411 What is standing wave ratio (SWR)? The ratio of amplifier power output to input The transmitter efficiency ratio A measure of how well a load is matched to a transmission line An indication of the quality of your station's ground connection 151 / 411 Which of the following is a requirement for the issuance of a club station license grant? All these choices are correct The trustee must have an Amateur Extra Class operator license grant The club must be registered with the American Radio Relay League The club must have at least four members 152 / 411 Why should a 5-ampere fuse never be replaced with a 20-ampere fuse? The power supply ripple would greatly increase The larger fuse would be likely to blow because it is rated for higher current Excessive current could cause a fire All these choices are correct 153 / 411 What method of call sign identification is required for a station transmitting phone signals? Send the call sign followed by the indicator R Send the call sign using a CW or phone emission Send the call sign followed by the indicator RPT Send the call sign using only a phone emission 154 / 411 In which type of circuit is voltage the same across all components? Parallel Resonant Series Branch 155 / 411 Which of the following bands may provide long-distance communications via the ionosphere's F region during the peak of the sunspot cycle? 6 and 10 meters 70 centimeters and 1.25 meters 23 centimeters All these choices are correct 156 / 411 What type of electrical component stores energy in a magnetic field? Diode Varistor Inductor Capacitor 157 / 411 What antenna polarization is normally used for long-distance CW and SSB contacts on the VHF and UHF bands? Right-hand circular Left-hand circular Vertical Horizontal 158 / 411 How does RF radiation differ from ionizing radiation (radioactivity)? RF radiation is perfectly safe RF radiation is limited in range to a few feet RF radiation does not have sufficient energy to cause chemical changes in cells and damage DNA RF radiation can only be detected with an RF dosimeter 159 / 411 Which of the following precautions should be taken when measuring high voltages with a voltmeter? Ensure that the voltmeter and leads are rated for use at the voltages to be measured Ensure that the voltmeter is set to the correct frequency Ensure that the voltmeter has very low impedance Ensure that the circuit is grounded through the voltmeter 160 / 411 What type of component is often used as an adjustable volume control? Potentiometer Fixed resistor Transformer Power resistor 161 / 411 What is the purpose of a fuse in an electrical circuit? To remove power in case of overload All these choices are correct To prevent power supply ripple from damaging a component To limit current to prevent shocks 162 / 411 Which is equal to one kilovolt? One one-thousandth of a volt One thousand volts One million volts One hundred volts 163 / 411 What is meant by "repeater offset"? The number of simultaneous transmit frequencies used by a repeater The repeater station identification is done on a separate frequency The difference between a repeater's transmit and receive frequencies The repeater has a time delay to prevent interference 164 / 411 What frequency range is referred to as VHF? 30 MHz to 300 MHz 300 MHz to 3000 MHz 30 kHz to 300 kHz 300 kHz to 3000 kHz 165 / 411 What should you do before calling CQ? All these choices are correct Ask if the frequency is in use Listen first to be sure that no one else is using the frequency Make sure you are authorized to use that frequency 166 / 411 Which amateur band includes 146.52 MHz? 20 meters 70 centimeters 6 meters 2 meters 167 / 411 What is the FCC Part 97 definition of a beacon? A government transmitter marking the amateur radio band edges A bulletin sent by the FCC to announce a national emergency An amateur station transmitting communications for the purposes of observing propagation or related experimental activities A continuous transmission of weather information authorized in the amateur bands by the National Weather Service 168 / 411 What causes spin fading of satellite signals? Circular polarized noise interference radiated from the sun Rotation of the satellite and its antennas Interfering signals within the satellite uplink band Doppler shift of the received signal 169 / 411 What should be the first step to resolve non-fiber optic cable TV interference caused by your amateur radio transmission? Add a high-pass filter to the TV antenna input Be sure all TV feed line coaxial connectors are installed properly Add a low-pass filter to the TV antenna input Add a preamplifier to the TV antenna input 170 / 411 How can you make sure your station stays in compliance with RF safety regulations? All these choices are correct By making sure your antennas have low SWR By informing the FCC of any changes made in your station By re-evaluating the station whenever an item in the transmitter or antenna system is changed 171 / 411 What term describes an amateur station that is transmitting and receiving on the same frequency? Full duplex Multiplex Diplex Simplex 172 / 411 What do the FCC rules state regarding the use of a phonetic alphabet for station identification in the Amateur Radio Service? It is encouraged All these choices are correct It is required when in contact with foreign stations It is required when transmitting emergency messages 173 / 411 Which of the following is combined with an inductor to make a resonant circuit? Potentiometer Capacitor Zener diode Resistor 174 / 411 When using a directional antenna, how might your station be able to communicate with a distant repeater if buildings or obstructions are blocking the direct line of sight path? Increase the antenna SWR Try the long path Change from vertical to horizontal polarization Try to find a path that reflects signals to the repeater 175 / 411 Which is equal to 1,500,000 hertz? 1500 MHz 1500 kHz 15 GHz 150 kHz 176 / 411 Which of the following is an appropriate power supply rating for a typical 50 watt output mobile FM transceiver? 24.0 volts at 12 amperes 13.8 volts at 12 amperes 13.8 volts at 4 amperes 24.0 volts at 4 amperes 177 / 411 What function is performed with a transceiver and a digital mode hot spot? FT8 digital communications via AFSK Communication using digital voice or data systems via the internet High-speed digital communications for meteor scatter RTTY encoding and decoding without a computer 178 / 411 What is the approximate bandwidth of AM fast-scan TV transmissions? More than 10 MHz About 3 MHz About 6 MHz About 1 MHz 179 / 411 When may an amateur station transmit without identifying on the air? When transmitting signals to control model craft When the transmissions are unmodulated When the transmitted power level is below 1 watt When the transmissions are of a brief nature to make station adjustments 180 / 411 Why are short, heavy-gauge wires used for a transceiver's DC power connection? All these choices are correct To avoid RF interference To provide a good counterpoise for the antenna To minimize voltage drop when transmitting 181 / 411 How is squelch adjusted so that a weak FM signal can be heard? Turn up the audio level until it overcomes the squelch threshold Turn on the anti-squelch function Enable squelch enhancement Set the squelch threshold so that receiver output audio is on all the time 182 / 411 What kind of data can be transmitted by APRS? GPS position data All these choices are correct Text messages Weather data 183 / 411 Why do exposure limits vary with frequency? Lower frequency RF fields do not penetrate the human body Higher frequency RF fields are transient in nature Lower frequency RF fields have more energy than higher frequency fields The human body absorbs more RF energy at some frequencies than at others 184 / 411 Which decibel value most closely represents a power increase from 5 watts to 10 watts? 10 dB 2 dB 5 dB 3 dB 185 / 411 Which of the following self-assigned indicators are acceptable when using a phone transmission? All these choices are correct KL7CC slash W3 KL7CC slant W3 KL7CC stroke W3 186 / 411 What is the unit of capacitance? The ohm The volt The henry The farad 187 / 411 Which is equal to one microvolt? One thousand kilovolts One one-thousandth of a volt One one-millionth of a volt One million volts 188 / 411 When is it permissible to transmit messages encoded to obscure their meaning? Only when transmitting certain approved digital codes Never Only during contests Only when transmitting control commands to space stations or radio control craft 189 / 411 What is the effect of excessive microphone gain on SSB transmissions? Increased SWR Distorted transmitted audio All these choices are correct Frequency instability 190 / 411 What is a grid locator? A letter-number designator assigned to a geographic location An instrument for neutralizing a final amplifier An instrument for radio direction finding A letter-number designator assigned to an azimuth and elevation 191 / 411 Where may SSB phone be used in amateur bands above 50 MHz? Only in sub-bands allocated to General class or higher licensees On any band if the power is limited to 25 watts Only on repeaters In at least some segment of all these bands 192 / 411 When configured to measure current, how is a multimeter connected to a component? In phase In quadrature In parallel In series 193 / 411 How much power is delivered by a voltage of 12 volts DC and a current of 2.5 amperes? 30 watts 14.5 watts 4.8 watts 0.208 watts 194 / 411 What is the term that describes a device's ability to amplify a signal? Forward voltage drop Gain On resistance Forward resistance 195 / 411 What is the Internet Radio Linking Project (IRLP)? A technique to connect amateur radio systems, such as repeaters, via the internet using Voice Over Internet Protocol (VoIP) A technique for measuring signal strength of an amateur transmitter via the internet A system for providing access to websites via amateur radio A system for informing amateurs in real time of the frequency of active DX stations 196 / 411 What is the relationship between wavelength and frequency? Wavelength gets longer as frequency increases Wavelength and frequency increase as path length increases Wavelength gets shorter as frequency increases Wavelength and frequency are unrelated 197 / 411 Which of the following restrictions apply when a non-licensed person is allowed to speak to a foreign station using a station under the control of a licensed amateur operator? The licensed control operator must do the station identification The person must be a U.S. citizen All these choices are correct The foreign station must be in a country with which the U.S. has a third party agreement 198 / 411 When are you required to transmit your assigned call sign? At the beginning of each contact, and every 10 minutes thereafter At least every 15 minutes during and at the end of a communication At least once during each transmission At least every 10 minutes during and at the end of a communication 199 / 411 What is the approximate bandwidth of a typical single sideband (SSB) voice signal? 1 kHz 3 kHz 15 kHz 6 kHz 200 / 411 What is the advantage of having multiple receive bandwidth choices on a multimode transceiver? Increases the number of frequencies that can be stored in memory Permits monitoring several modes at once by selecting a separate filter for each mode Permits noise or interference reduction by selecting a bandwidth matching the mode Increases the amount of offset between receive and transmit frequencies 201 / 411 Which of the following is included in packet radio transmissions? All these choices are correct Automatic repeat request in case of error A check sum that permits error detection A header that contains the call sign of the station to which the information is being sent 202 / 411 What electrical parameter is controlled by a potentiometer? Inductance Field strength Capacitance Resistance 203 / 411 Which of the following is a reason to use shielded wire? To prevent coupling of unwanted signals to or from the wire To decrease the resistance of DC power connections To couple the wire to other signals To increase the current carrying capability of the wire 204 / 411 What is a characteristic of VHF signals received via auroral backscatter? They are often received from 10,000 miles or more They occur only during winter nighttime hours They are generally strongest when your antenna is aimed west They are distorted and signal strength varies considerably 205 / 411 Which of the following is a form of amplitude modulation? Spread spectrum Packet radio Single sideband Phase shift keying (PSK) 206 / 411 Who is responsible for ensuring that no person is exposed to RF energy above the FCC exposure limits? The station licensee Anyone who is near an antenna The FCC The local zoning board 207 / 411 What is the major function of an antenna tuner (antenna coupler)? It allows an antenna to be used on both transmit and receive It helps a receiver automatically tune in weak stations It matches the antenna system impedance to the transceiver's output impedance It automatically selects the proper antenna for the frequency band being used 208 / 411 Which of the following is a safety hazard of a 12-volt storage battery? All these choices are correct Touching both terminals with the hands can cause electrical shock RF emissions from a nearby transmitter can cause the electrolyte to emit poison gas Shorting the terminals can cause burns, fire, or an explosion 209 / 411 How is a voltmeter connected to a component to measure applied voltage? In series In parallel In quadrature In phase 210 / 411 What is the current in a circuit with an applied voltage of 120 volts and a resistance of 80 ohms? 9600 amperes 1.5 amperes 0.667 amperes 200 amperes 211 / 411 What is the result of tuning an FM receiver above or below a signal's frequency? Change in audio pitch Sideband inversion Generation of a heterodyne tone Distortion of the signal's audio 212 / 411 What does the term "traffic" refer to in net operation? The number of stations checking in and out of a net Requests to activate the net by a served agency Messages exchanged by net stations Operation by mobile or portable stations 213 / 411 What device increases the transmitted output power from a transceiver? An impedance network A voltage divider An RF power amplifier All these choices are correct 214 / 411 What describes the ability to store energy in a magnetic field? Inductance Admittance Capacitance Resistance 215 / 411 Electrical power is measured in which of the following units? Volts Amperes Watts Watt-hours 216 / 411 What is a disadvantage of using a handheld VHF transceiver with a flexible antenna inside a vehicle? The bandwidth of the antenna will decrease, increasing SWR The SWR might decrease, decreasing the signal strength All these choices are correct Signal strength is reduced due to the shielding effect of the vehicle 217 / 411 What is component 3 in figure T-3? Meter Connector Variable inductor Variable capacitor 218 / 411 What is the characteristic appearance of a cold tin-lead solder joint? A bright or shiny surface Excessive solder Dark black spots A rough or lumpy surface 219 / 411 Which of the following measurements are made using a multimeter? Signal strength and noise Voltage and resistance All these choices are correct Impedance and reactance 220 / 411 What is the electrical term for the force that causes electron flow? Ampere-hours Capacitance Inductance Voltage 221 / 411 What frequency range is referred to as UHF? 30 to 300 kHz 30 to 300 MHz 300 to 3000 kHz 300 to 3000 MHz 222 / 411 What is required when climbing an antenna tower? All these choices are correct Always wear an approved climbing harness Use appropriate tie-off to the tower at all times Have sufficient training on safe tower climbing techniques 223 / 411 When may an amateur station transmit without a control operator? Never When the transmitting station is an auxiliary station When the station licensee is away and another licensed amateur is using the station When using automatic control, such as in the case of a repeater 224 / 411 What effect does multi-path propagation have on data transmissions? No significant changes will occur if the signals are transmitted using FM Error rates are likely to increase Transmission rates must be increased by a factor equal to the number of separate paths observed Transmission rates must be decreased by a factor equal to the number of separate paths observed 225 / 411 What is the name of a device that combines several semiconductors and other components into one package? Transformer Transducer Multi-pole relay Integrated circuit 226 / 411 What is a likely cause of irregular fading of signals propagated by the ionosphere? Intermodulation distortion Interference from thunderstorms Random combining of signals arriving via different paths Frequency shift due to Faraday rotation 227 / 411 What does a DMR "code plug" contain? Your call sign in CW for automatic identification The DMR software version The codec for digitizing audio Access information for repeaters and talkgroups 228 / 411 Which of the following connections is made between a computer and a transceiver to use computer software when operating digital modes? Computer “line out†to transceiver speaker connector Computer “line in†to transceiver push-to-talk Computer “line out†to transceiver push-to-talk Computer “line in†to transceiver speaker connector 229 / 411 Which of the following is an example of automatic control? Controlling a station over the internet Repeater operation Using a computer or other device to send CW automatically Using a computer or other device to identify automatically 230 / 411 Who selects a Frequency Coordinator? The FCC Office of Spectrum Management and Coordination Policy The local chapter of the Office of National Council of Independent Frequency Coordinators Amateur operators in a local or regional area whose stations are eligible to be repeater or auxiliary stations FCC Regional Field Office 231 / 411 What would cause your FM transmission audio to be distorted on voice peaks? You need to talk louder You are talking too loudly Your transmit power is too high Your repeater offset is inverted 232 / 411 Which of the following best describes an amateur radio mesh network? A satellite communications network using modified commercial satellite TV hardware An amateur-radio based data network using commercial Wi-Fi equipment with modified firmware A wide-bandwidth digital voice mode employing DMR protocols An internet linking protocol used to network repeaters 233 / 411 Which decibel value represents a power increase from 20 watts to 200 watts? 28 dB 12 dB 10 dB 18 dB 234 / 411 Which of the following actions should you take if a neighbor tells you that your station's transmissions are interfering with their radio or TV reception? Immediately turn off your transmitter and contact the nearest FCC office for assistance All these choices are correct Make sure that your station is functioning properly and that it does not cause interference to your own radio or television when it is tuned to the same channel Install a harmonic doubler on the output of your transmitter and tune it until the interference is eliminated 235 / 411 What type of transistor has a gate, drain, and source? Varistor Field-effect Tesla-effect Bipolar junction 236 / 411 Which of the following is good practice when installing ground wires on a tower for lightning protection? Ensure that connections are short and direct Put a drip loop in the ground connection to prevent water damage to the ground system Make sure all ground wire bends are right angles All these choices are correct 237 / 411 How is over the air access to IRLP nodes accomplished? By entering the proper internet password By using CTCSS tone codes By using DTMF signals By obtaining a password that is sent via voice to the node 238 / 411 What can you do if you are told your FM handheld or mobile transceiver is over-deviating? Change to a higher power level Talk louder into the microphone Talk farther away from the microphone Let the transceiver cool off 239 / 411 Which of the following can result in revocation of the station license or suspension of the operator license? Failure to have a copy of your license available at your station Failure to provide and maintain a correct email address with the FCC Failure to obtain FCC type acceptance prior to using a home-built transmitter Failure to inform the FCC of any changes in the amateur station following performance of an RF safety environmental evaluation 240 / 411 Which of the following protocols enables an amateur station to transmit through a repeater without using a radio to initiate the transmission? IRLP EchoLink DMR D-STAR 241 / 411 What is the abbreviation for megahertz? Mhz mh MH MHz 242 / 411 What reading on an SWR meter indicates a perfect impedance match between the antenna and the feed line? Full Scale Zero 50:50:00 1:01 243 / 411 Which of the following results from the fact that signals propagated by the ionosphere are elliptically polarized? Either vertically or horizontally polarized antennas may be used for transmission or reception Both the transmitting and receiving antennas must be of the same polarization Digital modes are unusable FM voice is unusable 244 / 411 What type of modulation is commonly used for VHF packet radio transmissions? FM or PM SSB AM PSK 245 / 411 Which of the following frequency ranges are available for phone operation by Technician licensees? 28.050 MHz to 28.150 MHz 28.500 MHz to 28.600 MHz 28.100 MHz to 28.300 MHz 28.300 MHz to 28.500 MHz 246 / 411 In which type of circuit is DC current the same through all components? Branch Parallel Resonant Series 247 / 411 Which frequency is in the 6 meter amateur band? 49.00 MHz 28.50 MHz 52.525 MHz 222.15 MHz 248 / 411 What type of electrical component consists of conductive surfaces separated by an insulator? Capacitor Potentiometer Oscillator Resistor 249 / 411 How soon after passing the examination for your first amateur radio license may you transmit on the amateur radio bands? As soon as your operator/station license grant appears on the ARRL website As soon as your operator/station license grant appears in the FCC's license database As soon as you receive your license in the mail from the FCC Immediately on receiving your Certificate of Successful Completion of Examination (CSCE) 250 / 411 What is a common repeater frequency offset in the 70 cm band? Plus or minus 600 kHz Plus or minus 1 MHz Plus or minus 5 MHz Plus or minus 500 kHz 251 / 411 Which of the following is an example of remote control as defined in Part 97? All these choices are correct Operating the station over the internet Controlling a model aircraft, boat, or car by amateur radio Repeater operation 252 / 411 Which term describes the ability of a receiver to discriminate between multiple signals? Selectivity Discrimination ratio Harmonic distortion Sensitivity 253 / 411 When the control operator is not the station licensee, who is responsible for the proper operation of the station? The control operator and the station licensee Only the control operator All licensed amateurs who are present at the operation Only the station licensee 254 / 411 Who is accountable if a repeater inadvertently retransmits communications that violate the FCC rules? The owner of the repeater The control operator of the originating station The control operator of the repeater Both the originating station and the repeater owner 255 / 411 What formula is used to calculate voltage in a circuit? E = I x R E = I + R E = I / R E = I - R 256 / 411 Which term describes the ability of a receiver to detect the presence of a signal? Linearity Sensitivity Selectivity Total Harmonic Distortion 257 / 411 On which HF bands does a Technician class operator have phone privileges? 30 meter band only 10 meter band only None 80 meter, 40 meter, 15 meter, and 10 meter bands 258 / 411 When may amateur radio operators use their stations to notify other amateurs of the availability of equipment for sale or trade? When selling amateur radio equipment and not on a regular basis When the equipment is not the personal property of either the station licensee, or the control operator, or their close relatives Never When no profit is made on the sale 259 / 411 How are US amateurs restricted in segments of bands where the Amateur Radio Service is secondary? Digital transmissions are not permitted in those segments U.S. amateurs must give foreign amateur stations priority in those segments U.S. amateurs may find non-amateur stations in those segments, and must avoid interfering with them International communications are not permitted in those segments 260 / 411 What mode of transmission is commonly used by amateur radio satellites? FM CW/data SSB All these choices are correct 261 / 411 What is a symptom of RF feedback in a transmitter or transceiver? The transmitter will not stay on the desired frequency Excessive SWR at the antenna connection Reports of garbled, distorted, or unintelligible voice transmissions Frequent blowing of power supply fuses 262 / 411 What technique is used to ensure that voice messages containing unusual words are received correctly? Speak very loudly into the microphone Spell the words using a standard phonetic alphabet Send the words by voice and Morse code All these choices are correct 263 / 411 What is the maximum peak envelope power output for Technician class operators in their HF band segments? 50 watts 200 watts 100 watts 10 watts 264 / 411 Which instrument can be used to determine SWR? Iambic pentameter Directional wattmeter Ohmmeter Voltmeter 265 / 411 What is the voltage across a 10-ohm resistor if a current of 1 ampere flows through it? 1 volt 10 volts 11 volts 9 volts 266 / 411 Which of the following methods is used to locate sources of noise interference or jamming? Phase locking Echolocation Doppler radar Radio direction finding 267 / 411 What are the two components of a radio wave? Ionizing and non-ionizing radiation Voltage and current Electric and magnetic fields Impedance and reactance 268 / 411 What causes tropospheric ducting? Sunspots and solar flares Discharges of lightning during electrical storms Updrafts from hurricanes and tornadoes Temperature inversions in the atmosphere 269 / 411 Which of the following controls could be used if the voice pitch of a single-sideband signal returning to your CQ call seems too high or low? The tone squelch The RIT or Clarifier The bandwidth selection The AGC or limiter 270 / 411 What is antenna gain? The increase in impedance on receive or transmit compared to a reference antenna The increase in signal strength in a specified direction compared to a reference antenna The additional power that is required in the antenna when transmitting on a higher frequency The additional power that is added to the transmitter power 271 / 411 What is the impact of using excessive effective radiated power on a satellite uplink? Overloading the satellite batteries Possibility of commanding the satellite to an improper mode Blocking access by other users Possibility of rebooting the satellite control computer 272 / 411 Which is equal to 1,000,000 picofarads? 1 microfarad 0.001 microfarads 1000 microfarads 1,000,000,000 microfarads 273 / 411 What is the resistance of a circuit for which the applied voltage is 12 volts and the current flow is 1.5 amperes? 8 ohms 0.125 ohms 18 ohms 13.5 ohms 274 / 411 Why should you avoid attaching an antenna to a utility pole? The 60 Hz radiations from the feed line may increase the SWR The antenna could contact high-voltage power lines The antenna will not work properly because of induced voltages All these choices are correct 275 / 411 When may amateur stations transmit information in support of broadcasting, program production, or news gathering, assuming no other means is available? When broadcasting communications to or from the space shuttle When such communications are directly related to the immediate safety of human life or protection of property Never Where noncommercial programming is gathered and supplied exclusively to the National Public Radio network 276 / 411 Which of the following conductors is preferred for bonding at RF? Twisted-pair cable Copper braid removed from coaxial cable Flat copper strap Steel wire 277 / 411 Under what conditions is an amateur station authorized to transmit music using a phone emission? When the music is transmitted above 1280 MHz When the music produces no spurious emissions When transmissions are limited to less than three minutes per hour When incidental to an authorized retransmission of manned spacecraft communications 278 / 411 What is the minimum safe distance from a power line to allow when installing an antenna? Enough so that if the antenna falls, no part of it can come closer than 10 feet to the power wires The height of the power line above ground 1/2 wavelength at the operating frequency Add the height of the antenna to the height of the power line and multiply by a factor of 1.5 279 / 411 What are the names of the electrodes of a bipolar junction transistor? Input, output, supply Pole one, pole two, output Emitter, base, collector Signal, bias, power 280 / 411 What operating activity involves contacting as many stations as possible during a specified period? Simulated emergency exercises Net operations Contesting Public service events 281 / 411 What is impedance? The Q or Quality Factor of a component The inverse of resistance The power handling capability of a component The opposition to AC current flow 282 / 411 In addition to frequency, which of the following is used to identify amateur radio bands? All these choices are correct Traditional letter/number designators Channel numbers The approximate wavelength in meters 283 / 411 What can cause erratic changes in SWR? Overload from a strong local station Local thunderstorm Over-modulation Loose connection in the antenna or feed line 284 / 411 Which of the following describes a simple dipole oriented parallel to Earth's surface? A ground-wave antenna A vertically polarized antenna A horizontally polarized antenna A travelling-wave antenna 285 / 411 What is the approximate length, in inches, of a half-wavelength 6 meter dipole antenna? 50 236 112 6 286 / 411 Which region of the atmosphere can refract or bend HF and VHF radio waves? The troposphere The mesosphere The stratosphere The ionosphere 287 / 411 What is a characteristic of single sideband (SSB) compared to FM? All these choices are correct SSB signals are easier to tune in correctly SSB signals are less susceptible to interference SSB signals have narrower bandwidth 288 / 411 What is component 3 in figure T-1? Ground symbol Resistor Transistor Lamp 289 / 411 Which of the following are required for remote control operation? All these choices are correct The control operator must be at the control point The control operator must indirectly manipulate the controls A control operator is required at all times 290 / 411 How can you join a digital repeater's "talkgroup"? Join the repeater owner's club Register your radio with the local FCC office Program your radio with the group's ID or code Sign your call after the courtesy tone 291 / 411 How can fundamental overload of a non-amateur radio or TV receiver by an amateur signal be reduced or eliminated? Switch the transmitter to a narrow-band mode Block the amateur signal with a filter at the antenna input of the affected receiver Block the interfering signal with a filter on the amateur transmitter Switch the transmitter from FM to SSB 292 / 411 How does the FCC define broadcasting for the Amateur Radio Service? Transmissions intended for reception by the general public Two-way transmissions by amateur stations Transmission of messages directed only to amateur operators Any transmission made by the licensed station 293 / 411 When, under normal circumstances, may a Technician class licensee be the control operator of a station operating in an Amateur Extra Class band segment? As part of a multi-operator contest team When using a club station whose trustee holds an Amateur Extra Class license When designated as the control operator by an Amateur Extra Class licensee At no time 294 / 411 In which direction does a half-wave dipole antenna radiate the strongest signal? Off the ends of the antenna Equally in all directions In the direction of the feed line Broadside to the antenna 295 / 411 Which is equal to 3.525 MHz? 0.003525 kHz 3525 kHz 35.25 kHz 3,525,000 kHz 296 / 411 What is the name for the flow of electrons in an electric circuit? Capacitance Resistance Voltage Current 297 / 411 Under which of the following circumstances are one-way transmissions by an amateur station prohibited? International Morse Code Practice Telecommand or transmissions of telemetry In all circumstances Broadcasting 298 / 411 What is a common repeater frequency offset in the 2 meter band? Plus or minus 1 MHz Plus or minus 5 MHz Plus or minus 500 kHz Plus or minus 600 kHz 299 / 411 Why should you not set your transmit frequency to be exactly at the edge of an amateur band or sub-band? To allow for calibration error in the transmitter frequency display All these choices are correct So that modulation sidebands do not extend beyond the band edge To allow for transmitter frequency drift 300 / 411 Why is duty cycle one of the factors used to determine safe RF radiation exposure levels? It affects the average exposure to radiation It takes into account the antenna feed line loss It affects the peak exposure to radiation It takes into account the thermal effects of the final amplifier 301 / 411 How may amateurs use the 219 to 220 MHz segment of 1.25 meter band? Fast-scan television only Spread spectrum only Fixed digital message forwarding systems only Emergency traffic only 302 / 411 What is the national calling frequency for FM simplex operations in the 2 meter band? 145.000 MHz 446.000 MHz 432.100 MHz 146.520 MHz 303 / 411 Which of the following is part of the Basis and Purpose of the Amateur Radio Service? All these choices are correct Providing communications for international non-profit organizations Providing personal radio communications for as many citizens as possible Advancing skills in the technical and communication phases of the radio art 304 / 411 What does the abbreviation "PSK" mean? Phase Shift Keying Pulse Shift Keying Phased Slide Keying Packet Short Keying 305 / 411 What term describes the use of a sub-audible tone transmitted along with normal voice audio to open the squelch of a receiver? DTMF CTCSS Tone burst Carrier squelch 306 / 411 What does a dummy load consist of? A low-voltage power supply and a DC relay A 50-ohm reactance used to terminate a transmission line A non-inductive resistor mounted on a heat sink A high-gain amplifier and a TR switch 307 / 411 What is the function of component 2 in figure T-1? Give off light when current flows through it Control the flow of current Convert electrical energy into radio waves Supply electrical energy 308 / 411 What is component 4 in figure T-3? Ground Antenna Dummy load Transmitter 309 / 411 Which of these items would be useful for a hidden transmitter hunt? A calibrated noise bridge Calibrated SWR meter All these choices are correct A directional antenna 310 / 411 Which of the following effects may allow radio signals to travel beyond obstructions between the transmitting and receiving stations? Doppler shift Faraday rotation Quantum tunneling Knife-edge diffraction 311 / 411 Which of the following could be the reason you are unable to access a repeater whose output you can hear? Improper transceiver offset You are using the wrong CTCSS tone You are using the wrong DCS code All these choices are correct 312 / 411 What is component 4 in figure T-2? Potentiometer Variable inductor Double-pole switch Transformer 313 / 411 Which of the following operating activities is supported by digital mode software in the WSJT-X software suite? Meteor scatter Earth-Moon-Earth All these choices are correct Weak signal propagation beacons 314 / 411 What formula is used to calculate resistance in a circuit? R = E - I R = E + I R = E x I R = E / I 315 / 411 Which of the following could you use to cure distorted audio caused by RF current on the shield of a microphone cable? Preamplifier Ferrite choke Band-pass filter Low-pass filter 316 / 411 Why is the radio horizon for VHF and UHF signals more distant than the visual horizon? Radio waves are not blocked by dust particles Radio signals move somewhat faster than the speed of light Radio waves are blocked by dust particles The atmosphere refracts radio waves slightly 317 / 411 What is component 9 in figure T-2? Variable resistor Variable capacitor Variable inductor Variable transformer 318 / 411 What, if any, are the restrictions concerning transmission of language that may be considered indecent or obscene? There is no such prohibition The ITU maintains a list of words that are not permitted to be used on amateur frequencies Any such language is prohibited The FCC maintains a list of words that are not permitted to be used on amateur frequencies 319 / 411 What is the most common impedance of coaxial cables used in amateur radio? 600 ohms 12 ohms 8 ohms 50 ohms 320 / 411 What is a characteristic of HF communication compared with communications on VHF and higher frequencies? There is less atmospheric interference (static) on HF HF antennas are generally smaller Long-distance ionospheric propagation is far more common on HF HF accommodates wider bandwidth signals 321 / 411 What weather condition might decrease range at microwave frequencies? Low barometric pressure High winds Colder temperatures Precipitation 322 / 411 What telemetry information is typically transmitted by satellite beacons? All these choices are correct The signal strength of received signals Time of day accurate to plus or minus 1/10 second Health and status of the satellite 323 / 411 What is the voltage across a 10-ohm resistor if a current of 2 amperes flows through it? 20 volts 0.2 volts 8 volts 12 volts 324 / 411 Which of the following is true when installing grounding conductors used for lightning protection? Use only non-insulated wire Wires must be carefully routed with precise right-angle bends Sharp bends must be avoided Common grounds must be avoided 325 / 411 What is component 1 in figure T-1? Transistor Battery Resistor Connector 326 / 411 Which is equal to 28400 kHz? 284.00 MHz 28.400 kHz 28.400 MHz 2.800 MHz 327 / 411 What language may you use for identification when operating in a phone sub-band? Any language recognized by the United Nations English, French, or Spanish Any language recognized by the ITU English 328 / 411 Which of the following causes failure of coaxial cables? Rapid fluctuation in transmitter output power Solder flux contamination Operation at 100% duty cycle for an extended period Moisture contamination 329 / 411 What is the meaning of the term "picket fencing"? Rapid flutter on mobile signals due to multipath propagation A type of ground system used with vertical antennas Local vs long-distance communications Alternating transmissions during a net operation 330 / 411 What is generally the best time for long-distance 10 meter band propagation via the F region? From shortly after sunset to dawn during periods of high sunspot activity From dawn to shortly after sunset during periods of low sunspot activity From shortly after sunset to dawn during periods of low sunspot activity From dawn to shortly after sunset during periods of high sunspot activity 331 / 411 Which type of modulation is commonly used for VHF and UHF voice repeaters? SSB AM PSK FM or PM 332 / 411 Who may receive telemetry from a space station? A licensed radio amateur with a transmitter equipped for interrogating the satellite A licensed radio amateur who has registered for an access code from AMSAT A licensed radio amateur who has been certified by the protocol developer Anyone 333 / 411 What is a band plan, beyond the privileges established by the FCC? A plan devised by a club to indicate frequency band usage A voluntary guideline for using different modes or activities within an amateur band A list of available net frequencies A list of operating schedules 334 / 411 Which of the following is an important safety rule to remember when using a crank-up tower? This type of tower must never be grounded This type of tower must never be painted All these choices are correct This type of tower must not be climbed unless it is retracted, or mechanical safety locking devices have been installed 335 / 411 Which of the following battery chemistries is rechargeable? All these choices are correct Lithium-ion Lead-acid Nickel-metal hydride 336 / 411 Which instrument is used to measure electric current? An electrometer A voltmeter An ammeter An ohmmeter 337 / 411 What factors affect the RF exposure of people near an amateur station antenna? Distance from the antenna to a person Radiation pattern of the antenna All these choices are correct Frequency and power level of the RF field 338 / 411 Electrical current is measured in which of the following units? Volts Watts Amperes Ohms 339 / 411 What is a transceiver? A device that combines a receiver and transmitter A device for automatically sending and decoding Morse code A device for matching feed line impedance to 50 ohms A device for converting receiver and transmitter frequencies to another band 340 / 411 What is component 6 in figure T-2? Resistor Transistor Regulator IC Capacitor 341 / 411 What electronic component allows current to flow in only one direction? Driven element Fuse Diode Resistor 342 / 411 What types of amateur stations can automatically retransmit the signals of other amateur stations? Auxiliary, beacon, or Earth stations Beacon, repeater, or space stations Earth, repeater, or space stations Repeater, auxiliary, or space stations 343 / 411 What should you do if something in a neighbor's home is causing harmful interference to your amateur station? Work with your neighbor to identify the offending device Politely inform your neighbor that FCC rules prohibit the use of devices that cause interference Make sure your station meets the standards of good amateur practice All these choices are correct 344 / 411 What happens to power lost in a feed line? It distorts the signal It increases the SWR It is radiated as harmonics It is converted into heat 345 / 411 What is the formula for converting frequency to approximate wavelength in meters? Wavelength in meters equals frequency in hertz divided by 300 Wavelength in meters equals frequency in megahertz divided by 300 Wavelength in meters equals frequency in hertz multiplied by 300 Wavelength in meters equals 300 divided by frequency in megahertz 346 / 411 What is meant by "check" in a radiogram header? A list of stations that have relayed the message A box on the message form that indicates that the message was received and/or relayed The call sign of the originating station The number of words or word equivalents in the text portion of the message 347 / 411 What device converts the RF input and output of a transceiver to another band? High-pass filter Phase converter Low-pass filter Transverter 348 / 411 Which of the following types of solder should not be used for radio and electronic applications? Rosin-core solder Lead-tin solder Tin-copper solder Acid-core solder 349 / 411 What is the formula used to calculate electrical power (P) in a DC circuit? P = I + E P = I × E P = E – I P = E / I 350 / 411 Which of the following is true of PL-259 type coax connectors? They are watertight They are a bayonet-type connector They are preferred for microwave operation They are commonly used at HF and VHF frequencies 351 / 411 What happens when antennas at opposite ends of a VHF or UHF line of sight radio link are not using the same polarization? Nothing significant will happen Signals have an echo effect The modulation sidebands might become inverted Received signal strength is reduced 352 / 411 How does the allowable power density for RF safety change if duty cycle changes from 100 percent to 50 percent? It decreases by 50 percent It increases by a factor of 3 There is no adjustment allowed for lower duty cycle It increases by a factor of 2 353 / 411 Which of the following is commonly used as a visual indicator? Zener diode Bipolar transistor LED FET 354 / 411 Which of the following establishes grounding requirements for an amateur radio tower or antenna? UL recommended practices FCC Part 97 rules Local electrical codes FAA tower lighting regulations 355 / 411 What type of radiation are radio signals? Non-ionizing radiation Alpha radiation Ionizing radiation Gamma radiation 356 / 411 What is the current through a 24-ohm resistor connected across 240 volts? 0.1 amperes 10 amperes 24,000 amperes 216 amperes 357 / 411 Which agency regulates and enforces the rules for the Amateur Radio Service in the United States? The FCC Homeland Security All these choices are correct FEMA 358 / 411 How many milliamperes is 1.5 amperes? 15,000 milliamperes 15 milliamperes 150 milliamperes 1500 milliamperes 359 / 411 What is the Amateur Radio Emergency Service (ARES)? A group of licensed amateurs who are members of the military and who voluntarily agreed to provide message handling services in the case of an emergency A training program that certifies amateur operators for membership in the Radio Amateur Civil Emergency Service A training program that provides licensing courses for those interested in obtaining an amateur license to use during emergencies A group of licensed amateurs who have voluntarily registered their qualifications and equipment for communications duty in the public service 360 / 411 Who must designate the station control operator? The station licensee The FCC Any licensed operator The frequency coordinator 361 / 411 At which of the following frequencies does maximum permissible exposure have the lowest value? 440 MHz 3.5 MHz 1296 MHz 50 MHz 362 / 411 Which of the following is an application of APRS? Providing real-time tactical digital communications in conjunction with a map showing the locations of stations Providing voice over internet connection between repeaters Showing automatically the number of packets transmitted via PACTOR during a specific time interval Providing information on the number of stations signed into a repeater 363 / 411 What is the current through a 100-ohm resistor connected across 200 volts? 20,000 amperes 2 amperes 100 amperes 0.5 amperes 364 / 411 Which of the following can damage a multimeter? Failing to connect one of the probes to ground Attempting to measure resistance using the voltage setting Attempting to measure voltage when using the resistance setting Not allowing it to warm up properly 365 / 411 What is component 8 in figure T-2? Regulator IC Resistor Light emitting diode Inductor 366 / 411 What is the relationship between the electric and magnetic fields of an electromagnetic wave? They are at right angles They are in parallel They revolve in opposite directions They travel at different speeds 367 / 411 Which of the following is accurately represented in electrical schematics? Wire lengths Component connections All these choices are correct Physical appearance of components 368 / 411 Which of the following RF connector types is most suitable for frequencies above 400 MHz? Type N DB-25 RS-213 UHF (PL-259/SO-239) 369 / 411 What types of international communications are an FCC-licensed amateur radio station permitted to make? Communications incidental to conducting business or remarks of a personal nature Only communications incidental to contest exchanges; all other communications are prohibited Communications incidental to the purposes of the Amateur Radio Service and remarks of a personal character Any communications that would be permitted by an international broadcast station 370 / 411 Which of the following is good procedure when contacting another station in a contest? All these choices are correct Contact the station twice to be sure that you are in his log Send only the minimum information needed for proper identification and the contest exchange Sign only the last two letters of your call if there are many other stations calling 371 / 411 What is the unit of inductance? The ohm The coulomb The henry The farad 372 / 411 Which is equal to 500 milliwatts? 0.02 watts 5 watts 50 watts 0.5 watts 373 / 411 Why are simplex UHF signals rarely heard beyond their radio horizon? UHF signals are usually not propagated by the ionosphere They are too weak to go very far UHF signals are absorbed by the ionospheric D region FCC regulations prohibit them from going more than 50 miles 374 / 411 What is the effect of vegetation on UHF and microwave signals? Amplification Polarization rotation Knife-edge diffraction Absorption 375 / 411 What is FT8? A digital slow-scan TV mode with forward error correction and automatic color compensation A wideband FM voice mode An eight channel multiplex mode for FM repeaters A digital mode capable of low signal-to-noise operation 376 / 411 What is the approximate velocity of a radio wave in free space? 150,000 meters per second 150,000 miles per hour 300,000,000 miles per hour 300,000,000 meters per second 377 / 411 Which of the following types of antenna offers the greatest gain? Yagi 5/8 wave vertical J pole Isotropic 378 / 411 What might be a problem if you receive a report that your audio signal through an FM repeater is distorted or unintelligible? Your transmitter is slightly off frequency All these choices are correct Your batteries are running low You are in a bad location 379 / 411 What type of signaling uses pairs of audio tones? D-STAR GPRS CTCSS DTMF 380 / 411 What is an amateur radio station that connects other amateur stations to the internet? A digipeater A gateway A beacon A repeater 381 / 411 Which of the following is used to convert a signal from one frequency to another? Amplifier Mixer Phase splitter Inverter 382 / 411 Which of the following describes alternating current? Current that alternates between a negative direction and zero All these answers are correct Current that alternates between positive and negative directions Current that alternates between a positive direction and zero 383 / 411 Which of the following are inputs to a satellite tracking program? All these choices are correct The last observed time of zero Doppler shift The Keplerian elements The satellite transmitted power 384 / 411 What describes the ability to store energy in an electric field? Resistance Capacitance Inductance Tolerance 385 / 411 What is the FCC Part 97 definition of a space station? An amateur station using amateur radio satellites for relay of signals Any satellite orbiting Earth A manned satellite orbiting Earth An amateur station located more than 50 km above Earth's surface 386 / 411 What is component 4 in figure T-1? Resistor Ground symbol Battery Transistor 387 / 411 What band is best suited for communicating via meteor scatter? 2 meters 6 meters 70 centimeters 33 centimeters 388 / 411 What type of switch is represented by component 3 in figure T-2? Single-pole single-throw Double-pole double-throw Double-pole single-throw Single-pole double-throw 389 / 411 Which of the following indicates that a station is listening on a repeater and looking for a contact? “QSY†followed by your call sign “CQ CQ†followed by the repeater's call sign The station's call sign followed by the word “monitoring†The repeater call sign followed by the station's call sign 390 / 411 Who may be the control operator of a station communicating through an amateur satellite or space station? Only an Amateur Extra Class operator Only an Amateur Extra Class operator who is also an AMSAT member A General class or higher licensee with a satellite operator certification Any amateur allowed to transmit on the satellite uplink frequency 391 / 411 Which of the following is a valid Technician class call sign format? W1XX All these choices are correct KF1XXX KA1X 392 / 411 Which of the following applies when two stations transmitting on the same frequency interfere with each other? Both stations should choose another frequency to avoid conflict Use subaudible tones so both stations can share the frequency The stations should negotiate continued use of the frequency Interference is inevitable, so no action is required 393 / 411 Which of the following types of propagation is most commonly associated with occasional strong signals on the 10, 6, and 2 meter bands from beyond the radio horizon? D region absorption Backscatter Sporadic E Gray-line propagation 394 / 411 What electrical component opposes the flow of current in a DC circuit? Transformer Resistor Inverter Inductor 395 / 411 Which Q signal indicates that you are receiving interference from other stations? QTH QRM QSB QRN 396 / 411 Except for some specific restrictions, what is the maximum peak envelope power output for Technician class operators using frequencies above 30 MHz? 500 watts 50 watts 1500 watts 100 watts 397 / 411 Which of the following describes DMR? An automatic position tracking mode for FM mobiles communicating through repeaters A digital technique for transmitting on two repeater inputs simultaneously for automatic error correction An automatic computer logging technique for hands-off logging when communicating while operating a vehicle A technique for time-multiplexing two digital voice signals on a single 12.5 kHz repeater channel 398 / 411 Which of the following battery chemistries is not rechargeable? Nickel-cadmium Lead-acid Carbon-zinc Lithium-ion 399 / 411 Which of the following is a resonant or tuned circuit? A circuit designed to provide high-fidelity audio An inductor and a capacitor in series or parallel A resistor circuit used for reducing standing wave ratio A linear voltage regulator 400 / 411 Which of the following types of signal has the narrowest bandwidth? Slow-scan TV FM voice CW SSB voice 401 / 411 Which decibel value most closely represents a power decrease from 12 watts to 3 watts? -9 dB -3 dB -6 dB -1 dB 402 / 411 Which of the following is an important safety precaution to observe when putting up an antenna tower? Look for and stay clear of any overhead electrical wires All these choices are correct Wear a ground strap connected to your wrist at all times Insulate the base of the tower to avoid lightning strikes 403 / 411 Are amateur station control operators ever permitted to operate outside the frequency privileges of their license class? Yes, but only in situations involving the immediate safety of human life or protection of property Yes, but only when part of a FEMA emergency plan Yes, but only when part of a RACES emergency plan No 404 / 411 Why are metals generally good conductors of electricity? They have many free electrons They have relatively high density All these choices are correct They have many free protons 405 / 411 What is the definition of duty cycle during the averaging time for RF exposure? The difference between the lowest power output and the highest power output of a transmitter The percentage of time that a transmitter is not transmitting The percentage of time that a transmitter is transmitting The difference between the PEP and average power output of a transmitter 406 / 411 Which sideband is normally used for 10 meter HF, VHF, and UHF single-sideband communications? Lower sideband Suppressed sideband Inverted sideband Upper sideband 407 / 411 What is the name of a circuit that generates a signal at a specific frequency? Low-pass filter Phase modulator Oscillator Reactance modulator 408 / 411 If your license has expired and is still within the allowable grace period, may you continue to transmit on the amateur radio bands? Yes, for up to one year Yes, for up to two years Yes, as soon as you apply for renewal No, you must wait until the license has been renewed 409 / 411 Which is equal to 3000 milliamperes? 0.3 amperes 3,000,000 amperes 3 amperes 0.003 amperes 410 / 411 What is an advantage of a 5/8 wavelength whip antenna for VHF or UHF mobile service? It eliminates distortion caused by reflected signals It has more gain than a 1/4-wavelength antenna It radiates at a very high angle It has 10 times the power gain of a 1/4 wavelength whip 411 / 411 What type of propagation is responsible for allowing over-the-horizon VHF and UHF communications to ranges of approximately 300 miles on a regular basis? Tropospheric ducting D region refraction Faraday rotation F2 region refraction Your score is 0% Restart quiz
