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Questions in US Amateur Radio - General (Element 3, 2023-2027)

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NameQuestion Study
G0A01What is one way that RF energy can affect human body tissue?Start
G0A02Which of the following is used to determine RF exposure from a transmitted signal?Start
G0A03How can you determine that your station complies with FCC RF exposure regulations?Start
G0A04What does “time averaging” mean when evaluating RF radiation exposure?Start
G0A05What must you do if an evaluation of your station shows that the RF energy radiated by your station exceeds permissible limits for possible human absorption?Start
G0A06What must you do if your station fails to meet the FCC RF exposure exemption criteria?Start
G0A07What is the effect of modulation duty cycle on RF exposure?Start
G0A08Which of the following steps must an amateur operator take to ensure compliance with RF safety regulations?Start
G0A09What type of instrument can be used to accurately measure an RF field strength?Start
G0A10What should be done if evaluation shows that a neighbor might experience more than the allowable limit of RF exposure from the main lobe of a directional antenna?Start
G0A11What precaution should be taken if you install an indoor transmitting antenna?Start
G0A12What stations are subject to the FCC rules on RF exposure?Start
G0B01Which wire or wires in a four-conductor 240 VAC circuit should be attached to fuses or circuit breakers?Start
G0B02According to the National Electrical Code, what is the minimum wire size that may be used safely for wiring with a 20-ampere circuit breaker?Start
G0B03Which size of fuse or circuit breaker would be appropriate to use with a circuit that uses AWG number 14 wiring?Start
G0B04Where should the station’s lightning protection ground system be located?Start
G0B05Which of the following conditions will cause a ground fault circuit interrupter (GFCI) to disconnect AC power?Start
G0B06Which of the following is covered by the National Electrical Code?Start
G0B07Which of these choices should be observed when climbing a tower using a safety harness?Start
G0B08What should be done before climbing a tower that supports electrically powered devices?Start
G0B09Which of the following is true of an emergency generator installation?Start
G0B10Which of the following is a danger from lead-tin solder?Start
G0B11Which of the following is required for lightning protection ground rods?Start
G0B12What is the purpose of a power supply interlock?Start
G0B13Where should lightning arrestors be located?Start
G1A01On which HF and/or MF amateur bands are there portions where General class licensees cannot transmit?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 only on specific channels, rather than frequency ranges?Start
G1A05On which of the following frequencies are General class licensees prohibited from operating as control operator?Start
G1A06Which of the following applies when the FCC rules designate the amateur service as a secondary user on a band?Start
G1A07On which amateur frequencies in the 10-meter band may stations with a General class control operator transmit CW emissions?Start
G1A08Which HF bands have segments exclusively allocated to Amateur Extra licensees?Start
G1A09Which of the following frequencies is within the General class portion of the 15-meter band?Start
G1A10What portion of the 10-meter band is available for repeater use?Start
G1A11When General class licensees are not permitted to use the entire voice portion of a band, which portion of the voice segment is available to them?Start
G1B01What is the maximum height above ground for an antenna structure not near a public use airport without requiring notification to the FAA and registration with the FCC?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 transmissions is permitted for all amateur stations?Start
G1B05Which of the following one-way transmissions are permitted?Start
G1B06Under what conditions are state and local governments permitted to regulate amateur radio antenna structures?Start
G1B07What are the restrictions on the use of abbreviations or procedural signals in the amateur service?Start
G1B08When is it permissible to communicate with amateur stations in countries outside the areas administered by the Federal Communications Commission?Start
G1B09On what HF frequencies are automatically controlled beacons permitted?Start
G1B10What is the power limit for beacon stations?Start
G1B11Who 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 transmitter power an amateur station may use on 10.140 MHz?Start
G1C02What is the maximum transmitter 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 is required by the FCC rules when operating in the 60-meter band?Start
G1C05What is the limit for transmitter power on the 28 MHz band for a General Class control operator?Start
G1C06What is the limit for transmitter power on the 1.8 MHz band?Start
G1C07What must be done before using a new digital protocol on the air?Start
G1C08What is the maximum symbol rate permitted for RTTY or data emission transmitted at frequencies below 28 MHz?Start
G1C09What is the maximum power limit on the 60-meter band?Start
G1C10What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 10-meter band?Start
G1C11What measurement is specified by FCC rules that regulate maximum power?Start
G1D01Who may receive partial credit for the elements represented by an expired amateur radio license?Start
G1D02What license examinations may you administer as an accredited Volunteer Examiner 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 an unexpired Certificate of Successful Completion of Examination (CSCE) for General class privileges?Start
G1D04Who must observe the administration of a Technician class license examination?Start
G1D05When operating a US station by remote control from outside the country, what license is required of the control operator?Start
G1D06Until an upgrade to General class is shown in the FCC database, when must a Technician licensee identify with “AG” after their call sign?Start
G1D07Volunteer Examiners are accredited by what organization?Start
G1D08Which of the following criteria must be met for a non-US 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
G1D11What action is required to obtain a new General class license after a previously held license has expired and the two-year grace period has passed?Start
G1D12When operating a station in South America by remote control over the internet from the US, what regulations apply?Start
G1E01Which of the following would disqualify a third party from participating in sending a message via an amateur station?Start
G1E02When may a 10-meter repeater retransmit the 2-meter signal from a station that has 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 are the restrictions on messages sent to a third party in a country with which there is a Third-Party Agreement?Start
G1E06The frequency allocations of which ITU region apply to radio amateurs operating in North and South America?Start
G1E07In what part of the 2.4 GHz band may an amateur station communicate with non-licensed Wi-Fi stations?Start
G1E08What is the maximum PEP output allowed for spread spectrum transmissions?Start
G1E09Under 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
G1E10Why should an amateur operator normally avoid transmitting on 14.100, 18.110, 21.150, 24.930 and 28.200 MHz?Start
G1E11On what bands may automatically controlled stations transmitting RTTY or data emissions communicate with other automatically controlled digital stations?Start
G1E12When may third-party messages be transmitted via remote control?Start
G2A01Which mode is most commonly used for voice communications on frequencies of 14 MHz or higher?Start
G2A02Which mode is most commonly used for voice communications on the 160-, 75-, and 40-meter bands?Start
G2A03Which mode 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- 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 of using single sideband, as compared to other analog voice modes on the HF amateur bands?Start
G2A07Which of the following statements is true of single sideband (SSB)?Start
G2A08What is the recommended way to break into a phone contact?Start
G2A09Why do most amateur stations use lower sideband on the 160-, 75-, and 40-meter bands?Start
G2A10Which of the following statements is true of VOX operation versus PTT operation?Start
G2A11Generally, who should respond to a station in the contiguous 48 states calling “CQ DX”?Start
G2A12What control is typically adjusted for proper ALC setting on a single sideband transceiver?Start
G2B01Which of the following is true concerning access to frequencies?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
G2B03What is good amateur practice if propagation changes during a contact creating interference from other stations using the frequency?Start
G2B04When selecting a CW transmitting frequency, what minimum separation from other stations should be used to minimize interference to stations on adjacent frequencies?Start
G2B05When selecting an SSB transmitting frequency, what minimum separation should be used to minimize interference to stations on adjacent frequencies?Start
G2B06How can you avoid harmful interference on an apparently clear frequency before calling CQ on CW or phone?Start
G2B07Which of the following complies with commonly accepted amateur practice when choosing a frequency on which to initiate a call?Start
G2B08What is the voluntary band plan restriction for US stations transmitting within the 48 contiguous states in the 50.1 MHz to 50.125 MHz band segment?Start
G2B09Who may be the control operator of an amateur station transmitting in RACES to assist relief operations during a disaster?Start
G2B10Which of the following is good amateur practice for net management?Start
G2B11How often may RACES training drills and tests be routinely conducted without special authorization?Start
G2C01Which of the following describes full break-in CW operation (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 Volunteer Monitor Program?Start
G2D02Which of the following are objectives of the Volunteer Monitor Program?Start
G2D03What procedure may be used by Volunteer Monitors to localize a station whose continuous carrier is holding a repeater on in their area?Start
G2D04Which of the following describes an azimuthal projection map?Start
G2D05Which of the following indicates that you are looking for an HF contact with any station?Start
G2D06How is a directional antenna pointed when making a “long-path” contact with another station?Start
G2D07Which of the following are examples of the NATO Phonetic Alphabet?Start
G2D08Why do many amateurs keep a station log?Start
G2D09Which of the following is required when participating in a contest on HF frequencies?Start
G2D10What is QRP operation?Start
G2D11Why are signal reports typically exchanged at the beginning of an HF contact?Start
G2E01Which mode is normally used when sending RTTY signals via AFSK with an SSB transmitter?Start
G2E02What is VARA?Start
G2E03What symptoms may result from other signals interfering with a PACTOR or VARA transmission?Start
G2E04Which of the following is good practice when choosing a transmitting frequency to answer a station calling CQ using FT8?Start
G2E05What is the standard sideband for JT65, JT9, FT4, or FT8 digital signal when using AFSK?Start
G2E06What is the most common frequency shift for RTTY emissions in the amateur HF bands?Start
G2E07Which of the following is required when using FT8?Start
G2E08In what segment of the 20-meter band are most digital mode 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 the primary purpose of an Amateur Radio Emergency Data Network (AREDN) mesh network?Start
G2E12Which of the following describes Winlink?Start
G2E13What is another name for a Winlink Remote Message Server?Start
G2E14What could be wrong if you cannot decode an RTTY or other FSK signal even though it is apparently tuned in properly?Start
G2E15Which of the following is a common location for FT8?Start
G3A01How does a higher sunspot number affect HF propagation?Start
G3A02What effect does a sudden ionospheric disturbance have on the daytime ionospheric propagation?Start
G3A03Approximately how long does it take the increased ultraviolet and X-ray radiation from a solar flare to affect radio propagation on Earth?Start
G3A04Which of the following are the least reliable bands 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
G3A08How can a geomagnetic storm affect HF propagation?Start
G3A09How can high geomagnetic activity benefit radio communications?Start
G3A10What causes HF propagation conditions to vary periodically in a 26- to 28-day cycle?Start
G3A11How long does it take a coronal mass ejection to affect radio propagation on Earth?Start
G3A12What does the K-index measure?Start
G3A13What does the A-index measure?Start
G3A14How is long distance radio communication usually affected by the charged particles that reach Earth from solar coronal holes?Start
G3B01What is a characteristic of skywave signals arriving at your location by both short-path and long-path propagation?Start
G3B02What factors affect the MUF?Start
G3B03Which frequency will have the least attenuation for long-distance skip propagation?Start
G3B04Which of the following is a way to determine current propagation on a desired band from your station?Start
G3B05How does the ionosphere affect radio waves with frequencies below the MUF and above the LUF?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 normally covered in one hop using the F2 region?Start
G3B10What is the approximate maximum distance along the Earth’s surface normally covered in one hop using the E region?Start
G3B11What happens to HF propagation when the LUF exceeds the MUF?Start
G3B12Which of the following is typical of the lower HF frequencies during the summer?Start
G3C01Which ionospheric region is closest to the surface of Earth?Start
G3C02What is meant by the term “critical frequency” at a given incidence angle?Start
G3C03Why is skip propagation via the F2 region longer than that via the other ionospheric regions?Start
G3C04What does the term “critical angle” mean, as applied to radio wave propagation?Start
G3C05Why is long-distance communication on the 40-, 60-, 80-, and 160-meter bands more difficult during the day?Start
G3C06What is a characteristic of HF scatter?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 propagation allows signals to be heard in the transmitting station’s skip zone?Start
G3C10What is near vertical incidence skywave (NVIS) propagation?Start
G3C11Which ionospheric region is the most absorbent of signals below 10 MHz during daylight hours?Start
G4A01What is the purpose of the notch filter found on many HF transceivers?Start
G4A02What is the benefit of using the opposite or “reverse” sideband when receiving CW?Start
G4A03How does a noise blanker work?Start
G4A04What is the effect on plate current of the correct setting of a vacuum-tube RF power amplifier’s TUNE control?Start
G4A05Why is automatic level control (ALC) used with an RF power amplifier?Start
G4A06What is the purpose of an antenna tuner?Start
G4A07What happens as a receiver’s noise reduction control level is increased?Start
G4A08What is the correct adjustment for the LOAD or COUPLING control of a vacuum tube RF power amplifier?Start
G4A09What is the purpose of delaying RF output after activating a transmitter’s keying line to an external amplifier?Start
G4A10What is the function of an electronic keyer?Start
G4A11Why should the ALC system be inactive when transmitting AFSK data signals?Start
G4A12Which of the following is a common use of the dual-VFO feature on a transceiver?Start
G4A13What is the purpose of using a receive attenuator?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 for 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 do voltmeters have high input impedance?Start
G4B06What is an advantage of a digital multimeter as compared to an analog multimeter?Start
G4B07What signals are used to conduct a two-tone test?Start
G4B08What transmitter performance parameter does a two-tone test analyze?Start
G4B09When is an analog multimeter preferred to a digital multimeter?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 effect can strong signals from nearby transmitters have on an antenna analyzer?Start
G4B13Which of the following can be measured with an antenna analyzer?Start
G4C01Which of the following might be useful in reducing RF interference to audio frequency circuits?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 experiencing RF interference from a single sideband phone transmitter?Start
G4C04What sound is heard from an audio device experiencing RF interference from a CW transmitter?Start
G4C05What is a possible cause of high voltages that produce RF burns?Start
G4C06What is a possible effect of a resonant ground connection?Start
G4C07Why should soldered joints not be used in lightning protection ground connections?Start
G4C08Which of the following would reduce RF interference caused by common-mode current on an audio cable?Start
G4C09How can the effects of ground loops be minimized?Start
G4C10What could be a symptom caused by a ground loop in your station’s audio connections?Start
G4C11What technique helps to minimize RF “hot spots” in an amateur station?Start
G4C12Why must all metal enclosures of station equipment be grounded?Start
G4D01What is the purpose of a speech processor in a transceiver?Start
G4D02How does a speech processor affect a single sideband phone signal?Start
G4D03What is the effect 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
G4D06How much change in signal strength is typically represented by one S unit?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 a band’s phone segment should your displayed carrier frequency be when using 3 kHz wide LSB?Start
G4D11How close to the upper edge of a band’s phone segment 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 an 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 should DC power for a 100-watt HF transceiver not be supplied by a vehicle’s auxiliary power socket?Start
G4E05Which of the following most limits an HF mobile installation?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 receive interference to an HF transceiver installed in a vehicle?Start
G4E08In what configuration are the individual cells in a solar panel connected together?Start
G4E09What is the approximate open-circuit voltage from a fully illuminated silicon photovoltaic cell?Start
G4E10Why should a series diode be connected between a solar panel and a storage battery that is being charged by the panel?Start
G4E11What precaution should be taken when connecting a solar panel to a lithium iron phosphate battery?Start
G5A01What happens when inductive and capacitive reactance are equal in a series LC circuit?Start
G5A02What is reactance?Start
G5A03Which of the following is opposition to the flow of alternating current in an inductor?Start
G5A04Which of the following is 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 is the term for the inverse of impedance?Start
G5A08What is impedance?Start
G5A09What unit is used to measure reactance?Start
G5A10Which of the following devices can be used for impedance matching at radio frequencies?Start
G5A11What letter is used to represent reactance?Start
G5A12What occurs in an LC circuit at resonance?Start
G5B01What dB change represents a factor of two increase or decrease in power?Start
G5B02How does the total current relate to the individual currents in a circuit of parallel resistors?Start
G5B03How many watts of electrical power are consumed if 400 VDC is supplied to an 800-ohm load?Start
G5B04How many watts of electrical power are consumed by a 12 VDC light bulb that draws 0.2 amperes?Start
G5B05How many watts are consumed when a current of 7.0 milliamperes flows through a 1,250-ohm resistance?Start
G5B06What is the PEP produced by 200 volts peak-to-peak across a 50-ohm dummy load?Start
G5B07What value of an AC signal produces the same power dissipation in a resistor as a DC voltage of the same value?Start
G5B08What is the peak-to-peak voltage of a sine wave with an RMS voltage of 120 volts?Start
G5B09What is the RMS voltage of a sine wave with a value of 17 volts peak?Start
G5B10What percentage of power loss is equivalent to a loss of 1 dB?Start
G5B11What is the ratio of PEP to average power for an unmodulated carrier?Start
G5B12What is the RMS voltage across a 50-ohm dummy load dissipating 1200 watts?Start
G5B13What is the output PEP of an unmodulated carrier if the average power is 1060 watts?Start
G5B14What is the output PEP of 500 volts peak-to-peak across a 50-ohm load?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 is the output voltage if an input signal is applied to the secondary winding of a 4:1 voltage step-down transformer instead of the primary winding?Start
G5C03What is the total resistance of a 10-, a 20-, and a 50-ohm resistor connected in parallel?Start
G5C04What is the approximate total resistance of a 100- and a 200-ohm resistor in parallel?Start
G5C05Why is the primary winding wire of a voltage step-up transformer usually a larger size than that of the secondary winding?Start
G5C06What is the voltage output of a transformer with a 500-turn primary and a 1500-turn secondary when 120 VAC is applied to the primary?Start
G5C07What transformer turns ratio matches an antenna’s 600-ohm feed point impedance to a 50-ohm coaxial cable?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 circuit with 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
G6A01What is the minimum allowable discharge voltage for maximum life of a standard 12-volt lead-acid battery?Start
G6A02What is an advantage of batteries with low internal resistance?Start
G6A03What is the approximate forward threshold voltage of a germanium diode?Start
G6A04Which of the following is characteristic of an electrolytic capacitor?Start
G6A05What is the approximate forward threshold voltage of a silicon junction diode?Start
G6A06Why should wire-wound resistors not be used in RF circuits?Start
G6A07What are the operating points for a bipolar transistor used as a switch?Start
G6A08Which of the following is characteristic of low voltage ceramic capacitors?Start
G6A09Which of the following describes MOSFET construction?Start
G6A10Which element of a vacuum tube regulates the flow of electrons between cathode and plate?Start
G6A11What happens when an inductor is operated above its self-resonant frequency?Start
G6A12What is the primary purpose of a screen grid in a vacuum tube?Start
G6B01What determines the performance of a ferrite core at different frequencies?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 a typical upper frequency limit for low SWR operation of 50-ohm BNC connectors?Start
G6B05What is an advantage of using a ferrite core toroidal inductor?Start
G6B06What kind of device is an integrated circuit operational amplifier?Start
G6B07Which of the following describes a type N connector?Start
G6B08How is an LED biased when emitting light?Start
G6B10How does a ferrite bead or core reduce common-mode RF current on the shield of a coaxial cable?Start
G6B11What is an SMA connector?Start
G6B12Which of these connector types is commonly used for low frequency or dc signal connections to a transceiver?Start
G7A01What is the function of a power supply bleeder resistor?Start
G7A02Which of the following components are used in a power supply filter network?Start
G7A03Which type of rectifier circuit uses two diodes and a center-tapped transformer?Start
G7A04What is characteristic of a half-wave rectifier in a 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 characteristic 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 solid core transformer?Start
G7A13Which symbol in Figure G7-1 represents a tapped inductor?Start
G7B01What is the purpose of neutralizing an amplifier?Start
G7B02Which of these classes of amplifiers has the highest efficiency?Start
G7B03Which of the following describes the function of a two-input AND gate?Start
G7B04In a Class A amplifier, what percentage of the time does the amplifying device conduct?Start
G7B05How many states does a 3-bit binary counter have?Start
G7B06What is a shift register?Start
G7B07Which of the following are basic components of a sine wave oscillator?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 describes a linear amplifier?Start
G7B11For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?Start
G7C01What circuit is used to select one of the sidebands from a balanced modulator?Start
G7C02What output is produced by a balanced modulator?Start
G7C03What is one reason to use an impedance matching transformer at a transmitter output?Start
G7C04How is a product detector used?Start
G7C05Which of the following is characteristic of a direct digital synthesizer (DDS)?Start
G7C06Which of the following is an advantage of a digital signal processing (DSP) filter compared to an analog filter?Start
G7C07What term specifies a filter’s attenuation inside its passband?Start
G7C08Which parameter affects receiver sensitivity?Start
G7C09What is the phase difference between the I and Q RF signals that software-defined radio (SDR) equipment uses for modulation and demodulation?Start
G7C10What is an advantage of using I-Q modulation with software-defined radios (SDRs)?Start
G7C11Which of these functions is performed by software in a software-defined radio (SDR)?Start
G7C12What is the frequency above which a low-pass filter’s output power is less than half the input power?Start
G7C13What term specifies a filter’s maximum ability to reject signals outside its passband?Start
G7C14The bandwidth of a band-pass filter is measured between what two frequencies?Start
G8A01How is direct binary FSK modulation generated?Start
G8A02What is the name of the process that changes the phase angle of an RF signal 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
G8A06Which of the following is characteristic of QPSK31?Start
G8A07Which of the following phone emissions uses the narrowest bandwidth?Start
G8A08Which of the following is an effect of overmodulation?Start
G8A09What type of modulation is used by FT8?Start
G8A10What is meant by the term “flat-topping,” when referring to an amplitude-modulated phone signal?Start
G8A11What is the modulation envelope of an AM signal?Start
G8A12What is QPSK modulation?Start
G8A13What is a link budget?Start
G8A14What is link margin?Start
G8B01Which mixer input is varied or tuned to convert signals of different frequencies to an intermediate frequency (IF)?Start
G8B02What is the term for interference from a signal at twice the IF frequency from the desired signal?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
G8B05Which intermodulation products are closest to the original signal frequencies?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
G8B11What combination of a mixer’s Local Oscillator (LO) and RF input frequencies is found in the output?Start
G8B12What process combines two signals in a non-linear circuit to produce unwanted spurious outputs?Start
G8B13Which of the following is an odd-order intermodulation product of frequencies F1 and F2?Start
G8C01On what band do amateurs share channels with the unlicensed Wi-Fi service?Start
G8C02Which digital mode is used as a low-power beacon for assessing HF propagation?Start
G8C03What part of a packet radio frame contains the routing and handling information?Start
G8C04Which of the following describes Baudot code?Start
G8C05In an ARQ mode, what is meant by a NAK response to a transmitted packet?Start
G8C06What action results from a failure to exchange information due to excessive transmission attempts when using an ARQ mode?Start
G8C07Which of the following narrow-band digital modes can receive signals with very low signal-to-noise ratios?Start
G8C08Which of the following statements is true about PSK31?Start
G8C09Which is true of mesh network microwave nodes?Start
G8C10How does forward error correction (FEC) allow the receiver to correct data errors?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
G8C13What is indicated on a waterfall display by one or more vertical lines on either side of a data mode or RTTY signal?Start
G8C14Which of the following describes a waterfall display?Start
G8C15What does an FT8 signal report of +3 mean?Start
G8C16Which of the following provide digital voice modes?Start
G9A01Which of the following factors determine the characteristic impedance of a parallel conductor feed line?Start
G9A02What is the relationship between high standing wave ratio (SWR) and transmission line loss?Start
G9A03What is the nominal characteristic impedance of “window line” transmission line?Start
G9A04What causes reflected power at an antenna’s feed point?Start
G9A05How does the attenuation of coaxial cable change with increasing frequency?Start
G9A06In what units is RF feed line loss usually expressed?Start
G9A07What must be done to prevent standing waves on a feed line connected to an antenna?Start
G9A08If the SWR on an antenna feed line is 5:1, and a matching network at the transmitter end of the feed line is adjusted to present a 1:1 SWR to the transmitter, what is the resulting SWR on the feed line?Start
G9A09What standing wave ratio results from connecting a 50-ohm feed line to a 200-ohm resistive load?Start
G9A10What standing wave ratio results from connecting a 50-ohm feed line to a 10-ohm resistive load?Start
G9A11What is the effect of transmission line loss on SWR measured at the input to the line?Start
G9B01What is a characteristic of a random-wire HF antenna connected directly to the transmitter?Start
G9B02Which of the following is a common way to adjust the feed point impedance of an elevated quarter-wave ground-plane vertical antenna to be approximately 50 ohms?Start
G9B03Which of the following best describes the radiation pattern of a quarter-wave ground-plane vertical antenna?Start
G9B04What is the radiation pattern of a dipole antenna in free space in a plane containing the conductor?Start
G9B05How does antenna height affect the azimuthal radiation pattern of a horizontal dipole HF antenna at elevation angles higher than about 45 degrees?Start
G9B06Where should the radial wires of a ground-mounted vertical antenna system be placed?Start
G9B07How does the feed point impedance of a horizontal 1/2 wave dipole antenna change as the antenna height is reduced to 1/10 wavelength 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 using 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 monopole 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
G9C03How do the lengths of a three-element Yagi reflector and director compare to that of the driven element?Start
G9C04How does antenna gain in dBi compare to gain stated in dBd for the same antenna?Start
G9C05What is the primary effect of increasing boom length and adding directors to a Yagi antenna?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
G9C09In free space, how does the gain of two three-element, horizontally polarized Yagi antennas spaced vertically 1/2 wavelength apart typically compare to the gain of a single three-element Yagi?Start
G9C10Which of the following can be adjusted to optimize forward gain, front-to-back ratio, or SWR bandwidth of a Yagi antenna?Start
G9C11What is a beta or hairpin match?Start
G9C12Which of the following is a characteristic of using a gamma match with a Yagi antenna?Start
G9D01Which of the following antenna types will be most effective as a near vertical incidence skywave (NVIS) antenna for short-skip communications on 40 meters during the day?Start
G9D02What is the feed point impedance of an end-fed half-wave antenna?Start
G9D03In which direction is the maximum radiation from a VHF/UHF “halo” antenna?Start
G9D04What is the primary function of antenna traps?Start
G9D05What is an advantage of vertically stacking 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
G9D08How does a “screwdriver” mobile antenna adjust its feed point impedance?Start
G9D09What is the primary use of a Beverage antenna?Start
G9D10In which direction or directions does an electrically small loop (less than 1/10 wavelength in circumference) have nulls in its radiation pattern?Start
G9D11Which of the following is a disadvantage of multiband antennas?Start
G9D12What is the common name of a dipole with a single central support?Start