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Questions in US Amateur Radio - General (Element 3, 2015-2019)

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NameQuestion Study
G0A01What is one way that RF energy can affect human body tissue?Start
G0A02Which of the following properties is important in estimating whether an RF signal exceeds the maximum permissible exposure (MPE)?Start
G0A03How can you determine that your station complies with FCC RF exposure regulations?Start
G0A04What does "time averaging" mean in reference to RF radiation exposure?Start
G0A05What must you do if an evaluation of your station shows RF energy radiated from your station exceeds permissible limits?Start
G0A06What precaution should be taken when installing a ground-mounted antenna?Start
G0A07What effect does transmitter duty cycle have when evaluating RF exposure?Start
G0A08Which of the following steps must an amateur operator take to ensure compliance with RF safety regulations when transmitter power exceeds levels specified in FCC Part 97.13?Start
G0A09What type of instrument can be used to accurately measure an RF field?Start
G0A10What is one thing that can be done if evaluation shows that a neighbor might receive more than the allowable limit of RF exposure from the main lobe of a directional antenna?Start
G0A11What precaution should you take if you install an indoor transmitting antenna?Start
G0A12What precaution should you take whenever you make adjustments or repairs to an antenna?Start
G0B01Which wire or wires in a four-conductor connection should be attached to fuses or circuit breakers in a device operated from a 240 VAC single phase source?Start
G0B02What is the minimum wire size that may be safely used for a circuit that draws up to 20 amperes of continuous current?Start
G0B03Which size of fuse or circuit breaker would be appropriate to use with a circuit that uses AWG number 14 wiring?Start
G0B04Which of the following is a primary reason for not placing a gasoline-fueled generator inside an occupied area?Start
G0B05Which of the following conditions will cause a Ground Fault Circuit Interrupter (GFCI) to disconnect the 120 or 240 Volt AC line power to a device?Start
G0B06Why must the metal enclosure of every item of station equipment be grounded?Start
G0B07Which of these choices should be observed when climbing a tower using a safety belt or harness?Start
G0B08What should be done by any person preparing to climb a tower that supports electrically powered devices?Start
G0B09Why should soldered joints not be used with the wires that connect the base of a tower to a system of ground rods?Start
G0B10Which of the following is a danger from lead-tin solder?Start
G0B11Which of the following is good practice for lightning protection grounds?Start
G0B12What is the purpose of a power supply interlock?Start
G0B13What must you do when powering your house from an emergency generator?Start
G0B14Which of the following is covered by the National Electrical Code?Start
G0B15Which of the following is true of an emergency generator installation?Start
G1A01On which of the following bands is a General Class license holder granted all amateur frequency privileges?Start
G1A02On which of the following bands is phone operation prohibited?Start
G1A03On which of the following bands is image transmission prohibited?Start
G1A04Which of the following amateur bands is restricted to communication on only specific channels, rather than frequency ranges?Start
G1A05Which of the following frequencies is in the General Class portion of the 40-meter band?Start
G1A06Which of the following frequencies is within the General Class portion of the 75-meter phone band?Start
G1A07Which of the following frequencies is within the General Class portion of the 20-meter phone band?Start
G1A08Which of the following frequencies is within the General Class portion of the 80-meter band?Start
G1A09Which of the following frequencies is within the General Class portion of the 15-meter band?Start
G1A10Which of the following frequencies is available to a control operator holding a General Class license?Start
G1A11When General Class licensees are not permitted to use the entire voice portion of a particular band, which portion of the voice segment is generally available to them?Start
G1A12Which of the following applies when the FCC rules designate the Amateur Service as a secondary user on a band?Start
G1A13What is the appropriate action if, when operating on either the 30-meter or 60-meter bands, a station in the primary service interferes with your contact?Start
G1A14In what ITU region is operation in the 7.175 to 7.300 MHz band permitted for a control operator holding an FCC issued General Class license?Start
G1B01What is the maximum height above ground to which an antenna structure may be erected without requiring notification to the FAA and registration with the FCC, provided it is not at or near a public use airport?Start
G1B02With which of the following conditions must beacon stations comply?Start
G1B03Which of the following is a purpose of a beacon station as identified in the FCC rules?Start
G1B04Which of the following must be true before amateur stations may provide communications to broadcasters for dissemination to the public?Start
G1B05When may music be transmitted by an amateur station?Start
G1B06When is an amateur station permitted to transmit secret codes?Start
G1B07What are the restrictions on the use of abbreviations or procedural signals in the Amateur Service?Start
G1B08When choosing a transmitting frequency, what should you do to comply with good amateur practice?Start
G1B09When may an amateur station transmit communications in which the licensee or control operator has a pecuniary (monetary) interest?Start
G1B10What is the power limit for beacon stations?Start
G1B11How does the FCC require an amateur station to be operated in all respects not specifically covered by the Part 97 rules?Start
G1B12Who or what determines "good engineering and good amateur practice" as applied to the operation of an amateur station in all respects not covered by the Part 97 rules?Start
G1C01What is the maximum transmitting power an amateur station may use on 10.140 MHz?Start
G1C02What is the maximum transmitting power an amateur station may use on the 12-meter band?Start
G1C03What is the maximum bandwidth permitted by FCC rules for Amateur Radio stations transmitting on USB frequencies in the 60-meter band?Start
G1C04Which of the following limitations apply to transmitter power on every amateur band?Start
G1C05Which of the following is a limitation on transmitter power on the 28 MHz band for a General Class control operator?Start
G1C06Which of the following is a limitation on transmitter power on the 1.8 MHz band?Start
G1C07What is the maximum symbol rate permitted for RTTY or data emission transmission on the 20-meter band?Start
G1C08What is the maximum symbol rate permitted for RTTY or data emission transmitted at frequencies below 28 MHz?Start
G1C09What is the maximum symbol rate permitted for RTTY or data emission transmitted on the 1.25-meter and 70-centimeter bands?Start
G1C10What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 10-meter band?Start
G1C11What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 2-meter band?Start
G1D01Who may receive credit for the elements represented by an expired amateur radio license?Start
G1D02What license examinations may you administer when you are an accredited VE holding a General Class operator license?Start
G1D03On which of the following band segments may you operate if you are a Technician Class operator and have a CSCE for General Class privileges?Start
G1D04Which of the following is a requirement for administering a Technician Class license examination?Start
G1D05Which of the following must a person have before they can be an administering VE for a Technician Class license examination?Start
G1D06When must you add the special identifier "AG" after your call sign if you are a Technician Class licensee and have a CSCE for General Class operator privileges, but the FCC has not yet posted your upgrade on its website ?Start
G1D07Volunteer Examiners are accredited by what organization?Start
G1D08Which of the following criteria must be met for a non-U.S. citizen to be an accredited Volunteer Examiner?Start
G1D09How long is a Certificate of Successful Completion of Examination (CSCE) valid for exam element credit?Start
G1D10What is the minimum age that one must be to qualify as an accredited Volunteer Examiner?Start
G1D11If a person has an expired FCC issued amateur radio license of General Class or higher, what is required before they can receive a new license?Start
G1E01Which of the following would disqualify a third party from participating in stating a message over an amateur station?Start
G1E02When may a 10-meter repeater retransmit the 2-meter signal from a station having a Technician Class control operator?Start
G1E03What is required to conduct communications with a digital station operating under automatic control outside the automatic control band segments?Start
G1E04Which of the following conditions require a licensed Amateur Radio operator to take specific steps to avoid harmful interference to other users or facilities?Start
G1E05What types of messages for a third party in another country may be transmitted by an amateur station?Start
G1E06Which of the following applies in the event of interference between a coordinated repeater and an uncoordinated repeater?Start
G1E07With which foreign countries is third party traffic prohibited, except for messages directly involving emergencies or disaster relief communications?Start
G1E08Which of the following is a requirement for a non-licensed person to communicate with a foreign Amateur Radio station from a station with an FCC-granted license at which an FCC licensed control operator is present?Start
G1E09What language must be used when identifying your station if you are using a language other than English in making a contact using phone emission?Start
G1E11Which of the following is the FCC term for an unattended digital station that transfers messages to and from the Internet?Start
G1E12Under what circumstances are messages that are sent via digital modes exempt from Part 97 third party rules that apply to other modes of communication?Start
G1E13On what bands may automatically controlled stations transmitting RTTY or data emissions communicate with other automatically controlled digital stations?Start
G2A01Which sideband is most commonly used for voice communications on frequencies of 14 MHz or higher?Start
G2A02Which of the following modes is most commonly used for voice communications on the 160-meter, 75-meter, and 40-meter bands?Start
G2A03Which of the following is most commonly used for SSB voice communications in the VHF and UHF bands?Start
G2A04Which mode is most commonly used for voice communications on the 17-meter and 12-meter bands?Start
G2A05Which mode of voice communication is most commonly used on the HF amateur bands?Start
G2A06Which of the following is an advantage when using single sideband as compared to other analog voice modes on the HF amateur bands?Start
G2A07Which of the following statements is true of the single sideband voice mode?Start
G2A08Which of the following is a recommended way to break into a contact when using phone?Start
G2A09Why do most amateur stations use lower sideband on the 160-meter, 75-meter and 40-meter bands?Start
G2A10Which of the following statements is true of voice VOX operation versus PTT operation?Start
G2A11What does the expression "CQ DX" usually indicate?Start
G2B01Which of the following is true concerning access to frequencies in non-emergency situations?Start
G2B02What is the first thing you should do if you are communicating with another amateur station and hear a station in distress break in?Start
G2B03If propagation changes during your contact and you notice increasing interference from other activity on the same frequency, what should you do?Start
G2B04When selecting a CW transmitting frequency, what minimum separation should be used to minimize interference to stations on adjacent frequencies?Start
G2B05What is the customary minimum frequency separation between SSB signals under normal conditions?Start
G2B06What is a practical way to avoid harmful interference on an apparently clear frequency before calling CQ on CW or phone?Start
G2B07Which of the following complies with good amateur practice when choosing a frequency on which to initiate a call?Start
G2B08What is the "DX window" in a voluntary band plan?Start
G2B09Who may be the control operator of an amateur station transmitting in RACES to assist relief operations during a disaster?Start
G2B10When may the FCC restrict normal frequency operations of amateur stations participating in RACES?Start
G2B11What frequency should be used to send a distress call?Start
G2B12When is an amateur station allowed to use any means at its disposal to assist another station in distress?Start
G2C01Which of the following describes full break-in telegraphy (QSK)?Start
G2C02What should you do if a CW station sends "QRS"?Start
G2C03What does it mean when a CW operator sends "KN" at the end of a transmission?Start
G2C04What does the Q signal "QRL?" mean?Start
G2C05What is the best speed to use when answering a CQ in Morse code?Start
G2C06What does the term "zero beat" mean in CW operation?Start
G2C07When sending CW, what does a "C" mean when added to the RST report?Start
G2C08What prosign is sent to indicate the end of a formal message when using CW?Start
G2C09What does the Q signal "QSL" mean?Start
G2C10What does the Q signal "QRN" mean?Start
G2C11What does the Q signal "QRV" mean?Start
G2D01What is the Amateur Auxiliary to the FCC?Start
G2D02Which of the following are objectives of the Amateur Auxiliary?Start
G2D03What skills learned during hidden transmitter hunts are of help to the Amateur Auxiliary?Start
G2D04Which of the following describes an azimuthal projection map?Start
G2D05When is it permissible to communicate with amateur stations in countries outside the areas administered by the Federal Communications Commission?Start
G2D06How is a directional antenna pointed when making a "long-path" contact with another station?Start
G2D07Which of the following is required by the FCC rules when operating in the 60-meter band?Start
G2D08What is a reason why many amateurs keep a station log?Start
G2D09What information is traditionally contained in a station log?Start
G2D10What is QRP operation?Start
G2D11Which HF antenna would be the best to use for minimizing interference?Start
G2E01Which mode is normally used when sending an RTTY signal via AFSK with an SSB transmitter?Start
G2E02How can a PACTOR modem or controller be used to determine if the channel is in use by other PACTOR stations?Start
G2E03What symptoms may result from other signals interfering with a PACTOR or WINMOR transmission?Start
G2E04What segment of the 20-meter band is most often used for digital transmissions?Start
G2E05What is the standard sideband used to generate a JT65 or JT9 digital signal when using AFSK in any amateur band?Start
G2E06What is the most common frequency shift for RTTY emissions in the amateur HF bands?Start
G2E07What segment of the 80-meter band is most commonly used for digital transmissions?Start
G2E08In what segment of the 20-meter band are most PSK31 operations commonly found?Start
G2E09How do you join a contact between two stations using the PACTOR protocol?Start
G2E10Which of the following is a way to establish contact with a digital messaging system gateway station?Start
G2E11What is indicated on a waterfall display by one or more vertical lines adjacent to a PSK31 signal?Start
G2E12Which of the following describes a waterfall display?Start
G2E13Which communication system sometimes uses the Internet to transfer messages?Start
G2E14What could be wrong if you cannot decode an RTTY or other FSK signal even though it is apparently tuned in properly?Start
G3A01What is the significance of the sunspot number with regard to HF propagation?Start
G3A02What effect does a Sudden Ionospheric Disturbance have on the daytime ionospheric propagation of HF radio waves?Start
G3A03Approximately how long does it take the increased ultraviolet and X-ray radiation from solar flares to affect radio propagation on the Earth?Start
G3A04Which of the following are least reliable for long distance communications during periods of low solar activity?Start
G3A05What is the solar flux index?Start
G3A06What is a geomagnetic storm?Start
G3A07At what point in the solar cycle does the 20-meter band usually support worldwide propagation during daylight hours?Start
G3A08Which of the following effects can a geomagnetic storm have on radio propagation?Start
G3A09What effect does a high sunspot number have on radio communications?Start
G3A10What causes HF propagation conditions to vary periodically in a 28 day cycle?Start
G3A11Approximately how long is the typical sunspot cycle?Start
G3A12What does the K-index indicate?Start
G3A13What does the A-index indicate?Start
G3A14How are radio communications usually affected by the charged particles that reach the Earth from solar coronal holes?Start
G3A15How long does it take charged particles from coronal mass ejections to affect radio propagation on the Earth?Start
G3A16What is a possible benefit to radio communications resulting from periods of high geomagnetic activity?Start
G3B01How might a sky-wave signal sound if it arrives at your receiver by both short path and long path propagation?Start
G3B02Which of the following is a good indicator of the possibility of sky-wave propagation on the 6-meter band?Start
G3B03Which of the following applies when selecting a frequency for lowest attenuation when transmitting on HF?Start
G3B04What is a reliable way to determine if the MUF is high enough to support skip propagation between your station and a distant location on frequencies between 14 and 30 MHz?Start
G3B05What usually happens to radio waves with frequencies below the MUF and above the LUF when they are sent into the ionosphere?Start
G3B06What usually happens to radio waves with frequencies below the LUF?Start
G3B07What does LUF stand for?Start
G3B08What does MUF stand for?Start
G3B09What is the approximate maximum distance along the Earth's surface that is normally covered in one hop using the F2 region?Start
G3B10What is the approximate maximum distance along the Earth's surface that is normally covered in one hop using the E region?Start
G3B11What happens to HF propagation when the LUF exceeds the MUF?Start
G3B12What factor or factors affect the MUF?Start
G3C01Which ionospheric layer is closest to the surface of the Earth?Start
G3C02Where on the Earth do ionospheric layers reach their maximum height?Start
G3C03Why is the F2 region mainly responsible for the longest distance radio wave propagation?Start
G3C04What does the term "critical angle" mean as used in radio wave propagation?Start
G3C05Why is long distance communication on the 40-meter, 60-meter, 80-meter and 160-meter bands more difficult during the day?Start
G3C06What is a characteristic of HF scatter signals?Start
G3C07What makes HF scatter signals often sound distorted?Start
G3C08Why are HF scatter signals in the skip zone usually weak?Start
G3C09What type of radio wave propagation allows a signal to be detected at a distance too far for ground wave propagation but too near for normal sky-wave propagation?Start
G3C10Which of the following might be an indication that signals heard on the HF bands are being received via scatter propagation?Start
G3C11Which of the following antenna types will be most effective for skip communications on 40-meters during the day?Start
G3C12Which ionospheric layer is the most absorbent of long skip signals during daylight hours on frequencies below 10 MHz?Start
G3C13What is Near Vertical Incidence Sky-wave (NVIS) propagation?Start
G4A01What is the purpose of the "notch filter" found on many HF transceivers?Start
G4A02What is one advantage of selecting the opposite or "reverse" sideband when receiving CW signals on a typical HF transceiver?Start
G4A03What is normally meant by operating a transceiver in "split" mode?Start
G4A04What reading on the plate current meter of a vacuum tube RF power amplifier indicates correct adjustment of the plate tuning control?Start
G4A05What is a reason to use Automatic Level Control (ALC) with an RF power amplifier?Start
G4A06What type of device is often used to match transmitter output impedance to an impedance not equal to 50 ohms?Start
G4A07What condition can lead to permanent damage to a solid-state RF power amplifier?Start
G4A08What is the correct adjustment for the load or coupling control of a vacuum tube RF power amplifier?Start
G4A09Why is a time delay sometimes included in a transmitter keying circuit?Start
G4A10What is the purpose of an electronic keyer?Start
G4A11Which of the following is a use for the IF shift control on a receiver?Start
G4A12Which of the following is a common use for the dual VFO feature on a transceiver?Start
G4A13What is one reason to use the attenuator function that is present on many HF transceivers?Start
G4A14What is likely to happen if a transceiver's ALC system is not set properly when transmitting AFSK signals with the radio using single sideband mode?Start
G4A15Which of the following can be a symptom of transmitted RF being picked up by an audio cable carrying AFSK data signals between a computer and a transceiver?Start
G4B01What item of test equipment contains horizontal and vertical channel amplifiers?Start
G4B02Which of the following is an advantage of an oscilloscope versus a digital voltmeter?Start
G4B03Which of the following is the best instrument to use when checking the keying waveform of a CW transmitter?Start
G4B04What signal source is connected to the vertical input of an oscilloscope when checking the RF envelope pattern of a transmitted signal?Start
G4B05Why is high input impedance desirable for a voltmeter?Start
G4B06What is an advantage of a digital voltmeter as compared to an analog voltmeter?Start
G4B07What signals are used to conduct a two-tone test?Start
G4B08Which of the following instruments may be used to monitor relative RF output when making antenna and transmitter adjustments?Start
G4B09Which of the following can be determined with a field strength meter?Start
G4B10Which of the following can be determined with a directional wattmeter?Start
G4B11Which of the following must be connected to an antenna analyzer when it is being used for SWR measurements?Start
G4B12What problem can occur when making measurements on an antenna system with an antenna analyzer?Start
G4B13What is a use for an antenna analyzer other than measuring the SWR of an antenna system?Start
G4B14What is an instance in which the use of an instrument with analog readout may be preferred over an instrument with a digital readout?Start
G4B15What type of transmitter performance does a two-tone test analyze?Start
G4C01Which of the following might be useful in reducing RF interference to audio frequency devices?Start
G4C02Which of the following could be a cause of interference covering a wide range of frequencies?Start
G4C03What sound is heard from an audio device or telephone if there is interference from a nearby single sideband phone transmitter?Start
G4C04What is the effect on an audio device or telephone system if there is interference from a nearby CW transmitter?Start
G4C05What might be the problem if you receive an RF burn when touching your equipment while transmitting on an HF band, assuming the equipment is connected to a ground rod?Start
G4C06What effect can be caused by a resonant ground connection?Start
G4C07What is one good way to avoid unwanted effects of stray RF energy in an amateur station?Start
G4C08Which of the following would reduce RF interference caused by common-mode current on an audio cable?Start
G4C09How can a ground loop be avoided?Start
G4C10What could be a symptom of a ground loop somewhere in your station?Start
G4C11Which of the following is a function of a digital signal processor?Start
G4C12Which of the following is an advantage of a receiver DSP IF filter as compared to an analog filter?Start
G4C13Which of the following can perform automatic notching of interfering carriers?Start
G4D01What is the purpose of a speech processor as used in a modern transceiver?Start
G4D02Which of the following describes how a speech processor affects a transmitted single sideband phone signal?Start
G4D03Which of the following can be the result of an incorrectly adjusted speech processor?Start
G4D04What does an S meter measure?Start
G4D05How does a signal that reads 20 dB over S9 compare to one that reads S9 on a receiver, assuming a properly calibrated S meter?Start
G4D06Where is an S meter found?Start
G4D07How much must the power output of a transmitter be raised to change the S meter reading on a distant receiver from S8 to S9?Start
G4D08What frequency range is occupied by a 3 kHz LSB signal when the displayed carrier frequency is set to 7.178 MHz?Start
G4D09What frequency range is occupied by a 3 kHz USB signal with the displayed carrier frequency set to 14.347 MHz?Start
G4D10How close to the lower edge of the 40-meter General Class phone segment should your displayed carrier frequency be when using 3 kHz wide LSB?Start
G4D11How close to the upper edge of the 20-meter General Class band should your displayed carrier frequency be when using 3 kHz wide USB?Start
G4E01What is the purpose of a capacitance hat on a mobile antenna?Start
G4E02What is the purpose of a corona ball on a HF mobile antenna?Start
G4E03Which of the following direct, fused power connections would be the best for a 100 watt HF mobile installation?Start
G4E04Why is it best NOT to draw the DC power for a 100 watt HF transceiver from a vehicle's auxiliary power socket?Start
G4E05Which of the following most limits the effectiveness of an HF mobile transceiver operating in the 75-meter band?Start
G4E06What is one disadvantage of using a shortened mobile antenna as opposed to a full size antenna?Start
G4E07Which of the following may cause interference to be heard in the receiver of an HF radio installed in a recent model vehicle?Start
G4E08What is the name of the process by which sunlight is changed directly into electricity?Start
G4E09What is the approximate open-circuit voltage from a fully illuminated silicon photovoltaic cell?Start
G4E10What is the reason that a series diode is connected between a solar panel and a storage battery that is being charged by the panel?Start
G4E11Which of the following is a disadvantage of using wind as the primary source of power for an emergency station?Start
G5A01What is impedance?Start
G5A02What is reactance?Start
G5A03Which of the following causes opposition to the flow of alternating current in an inductor?Start
G5A04Which of the following causes opposition to the flow of alternating current in a capacitor?Start
G5A05How does an inductor react to AC?Start
G5A06How does a capacitor react to AC?Start
G5A07What happens when the impedance of an electrical load is equal to the output impedance of a power source, assuming both impedances are resistive?Start
G5A08Why is impedance matching important?Start
G5A09What unit is used to measure reactance?Start
G5A10What unit is used to measure impedance?Start
G5A11Which of the following describes one method of impedance matching between two AC circuits?Start
G5A12What is one reason to use an impedance matching transformer?Start
G5A13Which of the following devices can be used for impedance matching at radio frequencies?Start
G5B01What dB change represents a two-times increase or decrease in power?Start
G5B02How does the total current relate to the individual currents in each branch of a purely resistive parallel circuit?Start
G5B03How many watts of electrical power are used if 400 VDC is supplied to an 800 ohm load?Start
G5B04How many watts of electrical power are used by a 12 VDC light bulb that draws 0.2 amperes?Start
G5B05How many watts are dissipated when a current of 7.0 milliamperes flows through 1.25 kilohms resistance?Start
G5B06What is the output PEP from a transmitter if an oscilloscope measures 200 volts peak-to-peak across a 50 ohm dummy load connected to the transmitter output?Start
G5B07What value of an AC signal produces the same power dissipation in a resistor as a DC voltage of the same value?Start
G5B09What is the RMS voltage of a sine wave with a value of 17 volts peak?Start
G5B10What percentage of power loss would result from a transmission line loss of 1 dB?Start
G5B11What is the ratio of peak envelope power to average power for an unmodulated carrier?Start
G5B12What would be the RMS voltage across a 50 ohm dummy load dissipating 1200 watts?Start
G5B13What is the output PEP of an unmodulated carrier if an average reading wattmeter connected to the transmitter output indicates 1060 watts?Start
G5B14What is the output PEP from a transmitter if an oscilloscope measures 500 volts peak-to-peak across a 50 ohm resistive load connected to the transmitter output?Start
G5C01What causes a voltage to appear across the secondary winding of a transformer when an AC voltage source is connected across its primary winding?Start
G5C02What happens if you reverse the primary and secondary windings of a 4:1 voltage step down transformer?Start
G5C03Which of the following components should be added to an existing resistor to increase the resistance?Start
G5C04What is the total resistance of three 100 ohm resistors in parallel?Start
G5C05If three equal value resistors in series produce 450 ohms, what is the value of each resistor?Start
G5C06What is the RMS voltage across a 500-turn secondary winding in a transformer if the 2250-turn primary is connected to 120 VAC?Start
G5C07What is the turns ratio of a transformer used to match an audio amplifier having 600 ohm output impedance to a speaker having 4 ohm impedance?Start
G5C08What is the equivalent capacitance of two 5.0 nanofarad capacitors and one 750 picofarad capacitor connected in parallel?Start
G5C09What is the capacitance of three 100 microfarad capacitors connected in series?Start
G5C10What is the inductance of three 10 millihenry inductors connected in parallel?Start
G5C11What is the inductance of a 20 millihenry inductor connected in series with a 50 millihenry inductor?Start
G5C12What is the capacitance of a 20 microfarad capacitor connected in series with a 50 microfarad capacitor?Start
G5C13Which of the following components should be added to a capacitor to increase the capacitance?Start
G5C14Which of the following components should be added to an inductor to increase the inductance?Start
G5C15What is the total resistance of a 10 ohm, a 20 ohm, and a 50 ohm resistor connected in parallel?Start
G5C16Why is the conductor of the primary winding of many voltage step up transformers larger in diameter than the conductor of the secondary winding?Start
G5C17What is the value in nanofarads (nF) of a 22,000 pF capacitor?Start
G5C18What is the value in microfarads of a 4700 nanofarad (nF) capacitor?Start
G6A01What is the minimum allowable discharge voltage for maximum life of a standard 12 volt lead acid battery?Start
G6A02What is an advantage of the low internal resistance of nickel-cadmium batteries?Start
G6A03What is the approximate junction threshold voltage of a germanium diode?Start
G6A04When is it acceptable to recharge a carbon-zinc primary cell?Start
G6A05What is the approximate junction threshold voltage of a conventional silicon diode?Start
G6A06Which of the following is an advantage of using a Schottky diode in an RF switching circuit rather than a standard silicon diode?Start
G6A07What are the stable operating points for a bipolar transistor used as a switch in a logic circuit?Start
G6A08Why must the cases of some large power transistors be insulated from ground?Start
G6A09Which of the following describes the construction of a MOSFET?Start
G6A10Which element of a triode vacuum tube is used to regulate the flow of electrons between cathode and plate?Start
G6A11Which of the following solid state devices is most like a vacuum tube in its general operating characteristics?Start
G6A12What is the primary purpose of a screen grid in a vacuum tube?Start
G6A13Why is the polarity of applied voltages important for polarized capacitors?Start
G6A14Which of the following is an advantage of ceramic capacitors as compared to other types of capacitors?Start
G6A15Which of the following is an advantage of an electrolytic capacitor?Start
G6A16What will happen to the resistance if the temperature of a resistor is increased?Start
G6A17Which of the following is a reason not to use wire-wound resistors in an RF circuit?Start
G6A18What is an advantage of using a ferrite core toroidal inductor?Start
G6A19How should the winding axes of two solenoid inductors be oriented to minimize their mutual inductance?Start
G6B01Which of the following is an analog integrated circuit?Start
G6B02What is meant by the term MMIC?Start
G6B03Which of the following is an advantage of CMOS integrated circuits compared to TTL integrated circuits?Start
G6B04What is meant by the term ROM?Start
G6B05What is meant when memory is characterized as non-volatile?Start
G6B06What kind of device is an integrated circuit operational amplifier?Start
G6B07Which of the following is an advantage of an LED indicator compared to an incandescent indicator?Start
G6B08How is an LED biased when emitting light?Start
G6B09Which of the following is a characteristic of a liquid crystal display?Start
G6B10What two devices in an Amateur Radio station might be connected using a USB interface?Start
G6B11What is a microprocessor?Start
G6B12Which of the following connectors would be a good choice for a serial data port?Start
G6B13Which of these connector types is commonly used for RF connections at frequencies up to 150 MHz?Start
G6B14Which of these connector types is commonly used for audio signals in Amateur Radio stations?Start
G6B15What is the main reason to use keyed connectors instead of non-keyed types?Start
G6B16Which of the following describes a type N connector?Start
G6B17What is the general description of a DIN type connector?Start
G6B18What is a type SMA connector?Start
G7A01What useful feature does a power supply bleeder resistor provide?Start
G7A02Which of the following components are used in a power supply filter network?Start
G7A03What is the peak-inverse-voltage across the rectifiers in a full-wave bridge power supply?Start
G7A04What is the peak-inverse-voltage across the rectifier in a half-wave power supply?Start
G7A05What portion of the AC cycle is converted to DC by a half-wave rectifier?Start
G7A06What portion of the AC cycle is converted to DC by a full-wave rectifier?Start
G7A07What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load?Start
G7A08Which of the following is an advantage of a switchmode power supply as compared to a linear power supply?Start
G7A09Which symbol in figure G7-1 represents a field effect transistor?Start
G7A10Which symbol in figure G7-1 represents a Zener diode?Start
G7A11Which symbol in figure G7-1 represents an NPN junction transistor?Start
G7A12Which symbol in Figure G7-1 represents a multiple-winding transformer?Start
G7A13Which symbol in Figure G7-1 represents a tapped inductor?Start
G7B01Complex digital circuitry can often be replaced by what type of integrated circuit?Start
G7B02Which of the following is an advantage of using the binary system when processing digital signals?Start
G7B03Which of the following describes the function of a two input AND gate?Start
G7B04Which of the following describes the function of a two input NOR gate?Start
G7B05How many states does a 3-bit binary counter have?Start
G7B06What is a shift register?Start
G7B07What are the basic components of virtually all sine wave oscillators?Start
G7B08How is the efficiency of an RF power amplifier determined?Start
G7B09What determines the frequency of an LC oscillator?Start
G7B10Which of the following is a characteristic of a Class A amplifier?Start
G7B11For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?Start
G7B12Which of these classes of amplifiers has the highest efficiency?Start
G7B13What is the reason for neutralizing the final amplifier stage of a transmitter?Start
G7B14Which of the following describes a linear amplifier?Start
G7C01Which of the following is used to process signals from the balanced modulator then send them to the mixer in some single sideband phone transmitters?Start
G7C02Which circuit is used to combine signals from the carrier oscillator and speech amplifier then send the result to the filter in some single sideband phone transmitters?Start
G7C03What circuit is used to process signals from the RF amplifier and local oscillator then send the result to the IF filter in a superheterodyne receiver?Start
G7C04What circuit is used to combine signals from the IF amplifier and BFO and send the result to the AF amplifier in some single sideband receivers?Start
G7C05Which of the following is an advantage of a transceiver controlled by a direct digital synthesizer (DDS)?Start
G7C06What should be the impedance of a low-pass filter as compared to the impedance of the transmission line into which it is inserted?Start
G7C07What is the simplest combination of stages that implement a superheterodyne receiver?Start
G7C08What type of circuit is used in many FM receivers to convert signals coming from the IF amplifier to audio?Start
G7C09Which of the following is needed for a Digital Signal Processor IF filter?Start
G7C10How is Digital Signal Processor filtering accomplished?Start
G7C11What is meant by the term "software defined radio" (SDR)?Start
G8A01How is an FSK signal generated?Start
G8A02What is the name of the process that changes the phase angle of an RF wave to convey information?Start
G8A03What is the name of the process that changes the instantaneous frequency of an RF wave to convey information?Start
G8A04What emission is produced by a reactance modulator connected to a transmitter RF amplifier stage?Start
G8A05What type of modulation varies the instantaneous power level of the RF signal?Start
G8A06What is one advantage of carrier suppression in a single sideband phone transmission versus full carrier amplitude modulation?Start
G8A07Which of the following phone emissions uses the narrowest bandwidth?Start
G8A08Which of the following is an effect of overmodulation?Start
G8A09What control is typically adjusted for proper ALC setting on an amateur single sideband transceiver?Start
G8A10What is meant by the term flat-topping when referring to a single sideband phone transmission?Start
G8A11What is the modulation envelope of an AM signal?Start
G8B01What receiver stage combines a 14.250 MHz input signal with a 13.795 MHz oscillator signal to produce a 455 kHz intermediate frequency (IF) signal?Start
G8B02If a receiver mixes a 13.800 MHz VFO with a 14.255 MHz received signal to produce a 455 kHz intermediate frequency (IF) signal, what type of interference will a 13.345 MHz signal produce in the receiver?Start
G8B03What is another term for the mixing of two RF signals?Start
G8B04What is the stage in a VHF FM transmitter that generates a harmonic of a lower frequency signal to reach the desired operating frequency?Start
G8B05What is the approximate bandwidth of a PACTOR3 signal at maximum data rate?Start
G8B06What is the total bandwidth of an FM phone transmission having 5 kHz deviation and 3 kHz modulating frequency?Start
G8B07What is the frequency deviation for a 12.21 MHz reactance modulated oscillator in a 5 kHz deviation, 146.52 MHz FM phone transmitter?Start
G8B08Why is it important to know the duty cycle of the mode you are using when transmitting?Start
G8B09Why is it good to match receiver bandwidth to the bandwidth of the operating mode?Start
G8B10What is the relationship between transmitted symbol rate and bandwidth?Start
G8C01Which of the following digital modes is designed to operate at extremely low signal strength on the HF bands?Start
G8C02How many data bits are sent in a single PSK31 character?Start
G8C03What part of a data packet contains the routing and handling information?Start
G8C04Which of the following describes Baudot code?Start
G8C05In the PACTOR protocol, what is meant by an NAK response to a transmitted packet?Start
G8C06What action results from a failure to exchange information due to excessive transmission attempts when using PACTOR or WINMOR?Start
G8C07How does the receiving station respond to an ARQ data mode packet containing errors?Start
G8C08Which of the following statements is true about PSK31?Start
G8C09What does the number 31 represent in "PSK31"?Start
G8C10How does forward error correction (FEC) allow the receiver to correct errors in received data packets?Start
G8C11How are the two separate frequencies of a Frequency Shift Keyed (FSK) signal identified?Start
G8C12Which type of code is used for sending characters in a PSK31 signal?Start
G9A01Which of the following factors determine the characteristic impedance of a parallel conductor antenna feed line?Start
G9A02What are the typical characteristic impedances of coaxial cables used for antenna feed lines at amateur stations?Start
G9A03What is the characteristic impedance of flat ribbon TV type twinlead?Start
G9A04What might cause reflected power at the point where a feed line connects to an antenna?Start
G9A05How does the attenuation of coaxial cable change as the frequency of the signal it is carrying increases?Start
G9A06In what units is RF feed line loss usually expressed?Start
G9A07What must be done to prevent standing waves on an antenna feed line?Start
G9A08If the SWR on an antenna feed line is 5 to 1, and a matching network at the transmitter end of the feed line is adjusted to 1 to 1 SWR, what is the resulting SWR on the feed line?Start
G9A09What standing wave ratio will result when connecting a 50 ohm feed line to a non-reactive load having 200 ohm impedance?Start
G9A10What standing wave ratio will result when connecting a 50 ohm feed line to a non-reactive load having 10 ohm impedance?Start
G9A11What standing wave ratio will result when connecting a 50 ohm feed line to a non-reactive load having 50 ohm impedance?Start
G9A12What standing wave ratio will result when connecting a 50 ohm feed line to a non-reactive load having 25 ohm impedance?Start
G9A13What standing wave ratio will result when connecting a 50 ohm feed line to an antenna that has a purely resistive 300 ohm feed point impedance?Start
G9A14What is the interaction between high standing wave ratio (SWR) and transmission line loss?Start
G9A15What is the effect of transmission line loss on SWR measured at the input to the line?Start
G9B01What is one disadvantage of a directly fed random-wire HF antenna?Start
G9B02Which of the following is a common way to adjust the feed point impedance of a quarter wave ground plane vertical antenna to be approximately 50 ohms?Start
G9B03What happens to the feed point impedance of a ground plane antenna when its radials are changed from horizontal to sloping downward?Start
G9B04What is the radiation pattern of a dipole antenna in free space in the plane of the conductor?Start
G9B05How does antenna height affect the horizontal (azimuthal) radiation pattern of a horizontal dipole HF antenna?Start
G9B06Where should the radial wires of a ground-mounted vertical antenna system be placed?Start
G9B07How does the feed point impedance of a 1/2 wave dipole antenna change as the antenna is lowered below 1/4 wave above ground?Start
G9B08How does the feed point impedance of a 1/2 wave dipole change as the feed point is moved from the center toward the ends?Start
G9B09Which of the following is an advantage of a horizontally polarized as compared to a vertically polarized HF antenna?Start
G9B10What is the approximate length for a 1/2 wave dipole antenna cut for 14.250 MHz?Start
G9B11What is the approximate length for a 1/2 wave dipole antenna cut for 3.550 MHz?Start
G9B12What is the approximate length for a 1/4 wave vertical antenna cut for 28.5 MHz?Start
G9C01Which of the following would increase the bandwidth of a Yagi antenna?Start
G9C02What is the approximate length of the driven element of a Yagi antenna?Start
G9C03Which statement about a three-element, single-band Yagi antenna is true?Start
G9C04Which statement about a three-element, single-band Yagi antenna is true?Start
G9C05How does increasing boom length and adding directors affect a Yagi antenna?Start
G9C06What configuration of the loops of a two-element quad antenna must be used for the antenna to operate as a beam antenna, assuming one of the elements is used as a reflector?Start
G9C07What does "front-to-back ratio" mean in reference to a Yagi antenna?Start
G9C08What is meant by the "main lobe" of a directive antenna?Start
G9C09How does the gain of two 3-element horizontally polarized Yagi antennas spaced vertically 1/2 wavelength apart typically compare to the gain of a single 3-element Yagi?Start
G9C10Which of the following is a Yagi antenna design variable that could be adjusted to optimize forward gain, front-to-back ratio, or SWR bandwidth?Start
G9C11What is the purpose of a gamma match used with Yagi antennas?Start
G9C12Which of the following is an advantage of using a gamma match for impedance matching of a Yagi antenna to 50 ohm coax feed line?Start
G9C13Approximately how long is each side of the driven element of a quad antenna?Start
G9C14How does the forward gain of a two-element quad antenna compare to the forward gain of a three-element Yagi antenna?Start
G9C15Approximately how long is each side of the reflector element of a quad antenna?Start
G9C16How does the gain of a two-element delta-loop beam compare to the gain of a two-element quad antenna?Start
G9C17Approximately how long is each leg of a symmetrical delta-loop antenna?Start
G9C18What happens when the feed point of a quad antenna of any shape is moved from the midpoint of the top or bottom to the midpoint of either side?Start
G9C19How does antenna gain stated in dBi compare to gain stated in dBd for the same antenna?Start
G9C20What is meant by the terms dBi and dBd when referring to antenna gain?Start
G9D01What does the term NVIS mean as related to antennas?Start
G9D02Which of the following is an advantage of an NVIS antenna?Start
G9D03At what height above ground is an NVIS antenna typically installed?Start
G9D04What is the primary purpose of antenna traps?Start
G9D05What is an advantage of vertical stacking of horizontally polarized Yagi antennas?Start
G9D06Which of the following is an advantage of a log periodic antenna?Start
G9D07Which of the following describes a log periodic antenna?Start
G9D08Why is a Beverage antenna not used for transmitting?Start
G9D09Which of the following is an application for a Beverage antenna?Start
G9D10Which of the following describes a Beverage antenna?Start
G9D11Which of the following is a disadvantage of multiband antennas?Start