US Amateur Radio - General (Element 3, 2023-2027) Practice Test

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US Amateur Radio - General (Element 3, 2023-2027) Practice Test

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1. - G0A01

What is one way that RF energy can affect human body tissue?

Select	Answer
A	It cools body tissue
B	It causes radiation poisoning
C	It causes the blood count to reach a dangerously low level
D	It heats body tissue

2. - G0B12

What is the purpose of a power supply interlock?

Select	Answer
A	To ensure that dangerous voltages are removed if the cabinet is opened
B	To shut off the power supply if too much voltage is produced
C	To shut down the unit if it becomes too hot
D	To prevent unauthorized changes to the circuit that would void the manufacturer’s warranty

3. - G1A10

What portion of the 10-meter band is available for repeater use?

Select	Answer
A	The portion above 29.5 MHz
B	The portion between 28.3 MHz and 28.5 MHz
C	The portion between 28.1 MHz and 28.2 MHz
D	The entire band

4. - G1B01

What 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?

Select	Answer
A	50 feet
B	200 feet
C	250 feet
D	100 feet

5. - G1C05

What is the limit for transmitter power on the 28 MHz band for a General Class control operator?

Select	Answer
A	100 watts PEP output
B	2000 watts PEP output
C	1000 watts PEP output
D	1500 watts PEP output

6. - G1D01

Who may receive partial credit for the elements represented by an expired amateur radio license?

Select	Answer
A	Any person who previously held an amateur license issued by another country, but only if that country has a current reciprocal licensing agreement with the FCC
B	Any person who can demonstrate that they once held an FCC-issued General, Advanced, or Amateur Extra class license that was not revoked by the FCC
C	Only persons who once held an FCC issued Novice, Technician, or Technician Plus license
D	Anyone who held an FCC-issued amateur radio license that expired not less than 5 and not more than 15 years ago

7. - G1E01

Which of the following would disqualify a third party from participating in sending a message via an amateur station?

Select	Answer
A	The third party is speaking in a language other than English
B	The third party’s amateur license has been revoked and not reinstated
C	All these choices are correct
D	The third party is not a US citizen

8. - G2A08

What is the recommended way to break into a phone contact?

Select	Answer
A	Say your call sign once
B	Say “Breaker Breaker”
C	Say “QRZ” several times, followed by your call sign
D	Say “CQ” followed by the call sign of either station

9. - G2B09

Who may be the control operator of an amateur station transmitting in RACES to assist relief operations during a disaster?

Select	Answer
A	Any control operator when normal communication systems are operational
B	A person holding an FCC-issued amateur operator license or an appropriate government official
C	Only a person holding an FCC-issued amateur operator license
D	Only a RACES net control operator

10. - G2C07

When sending CW, what does a “C” mean when added to the RST report?

Select	Answer
A	Chirpy or unstable signal
B	100 percent copy
C	Key clicks
D	Report was read from an S meter rather than estimated

11. - G2D01

What is the Volunteer Monitor Program?

Select	Answer
A	Amateur volunteers who conduct amateur licensing examinations
B	Amateur volunteers who conduct frequency coordination for amateur VHF repeaters
C	Amateur volunteers who use their station equipment to help civil defense organizations in times of emergency
D	Amateur volunteers who are formally enlisted to monitor the airwaves for rules violations

12. - G2E14

What could be wrong if you cannot decode an RTTY or other FSK signal even though it is apparently tuned in properly?

Select	Answer
A	All these choices are correct
B	You may have selected the wrong baud rate
C	The mark and space frequencies may be reversed
D	You may be listening on the wrong sideband

13. - G3A10

What causes HF propagation conditions to vary periodically in a 26- to 28-day cycle?

Select	Answer
A	Long term oscillations in the upper atmosphere
B	Cyclic variation in Earth’s radiation belts
C	The position of the Moon in its orbit
D	Rotation of the Sun’s surface layers around its axis

14. - G3B02

What factors affect the MUF?

Select	Answer
A	Path distance and location
B	All these choices are correct
C	Time of day and season
D	Solar radiation and ionospheric disturbances

15. - G3C01

Which ionospheric region is closest to the surface of Earth?

Select	Answer
A	The F2 region
B	The D region
C	The F1 region
D	The E region

16. - G4A13

What is the purpose of using a receive attenuator?

Select	Answer
A	To reduce the transmitter power when driving a linear amplifier
B	To reduce excessive audio level on strong signals
C	To prevent receiver overload from strong incoming signals
D	To reduce power consumption when operating from batteries

17. - G4B11

Which of the following must be connected to an antenna analyzer when it is being used for SWR measurements?

Select	Answer
A	Antenna and feed line
B	Transmitter
C	All these choices are correct
D	Receiver

18. - G4C01

Which of the following might be useful in reducing RF interference to audio frequency circuits?

Select	Answer
A	Forward-biased diode
B	Bypass inductor
C	Reverse-biased diode
D	Bypass capacitor

19. - G4D03

What is the effect of an incorrectly adjusted speech processor?

Select	Answer
A	Excessive background noise
B	Distorted speech
C	All these choices are correct
D	Excess intermodulation products

20. - G4E06

What is one disadvantage of using a shortened mobile antenna as opposed to a full-size antenna?

Select	Answer
A	Harmonic radiation may increase
B	Operating bandwidth may be very limited
C	Q of the antenna will be very low
D	Short antennas are more likely to cause distortion of transmitted signals

21. - G5A10

Which of the following devices can be used for impedance matching at radio frequencies?

Select	Answer
A	All these choices are correct
B	A Pi-network
C	A length of transmission line
D	A transformer

22. - G5B12

What is the RMS voltage across a 50-ohm dummy load dissipating 1200 watts?

Select	Answer
A	173 volts
B	692 volts
C	346 volts
D	245 volts

23. - G5C13

Which of the following components should be added to a capacitor to increase the capacitance?

Select	Answer
A	A capacitor in series
B	A capacitor in parallel
C	An inductor in parallel
D	An inductor in series

24. - G6A10

Which element of a vacuum tube regulates the flow of electrons between cathode and plate?

Select	Answer
A	Suppressor grid
B	Screen grid
C	Control grid
D	Trigger electrode

25. - G6B04

What is a typical upper frequency limit for low SWR operation of 50-ohm BNC connectors?

Select	Answer
A	4 GHz
B	50 MHz
C	40 GHz
D	500 MHz

26. - G7A06

What portion of the AC cycle is converted to DC by a full-wave rectifier?

Select	Answer
A	90 degrees
B	360 degrees
C	180 degrees
D	270 degrees

27. - G7B11

For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?

Select	Answer
A	SSB
B	AM
C	FM
D	All these choices are correct

28. - G7C05

Which of the following is characteristic of a direct digital synthesizer (DDS)?

Select	Answer
A	Pure sine wave output
B	Extremely narrow tuning range
C	Variable output frequency with the stability of a crystal oscillator
D	Relatively high-power output

29. - G8A09

What type of modulation is used by FT8?

Select	Answer
A	8-tone frequency shift keying
B	8-bit direct sequence spread spectrum
C	Amplitude compressed AM
D	Vestigial sideband

30. - G8B11

What combination of a mixer’s Local Oscillator (LO) and RF input frequencies is found in the output?

Select	Answer
A	The ratio
B	The average
C	The arithmetic product
D	The sum and difference

31. - G8C03

What part of a packet radio frame contains the routing and handling information?

Select	Answer
A	Directory
B	Trailer
C	Header
D	Preamble

32. - G9A06

In what units is RF feed line loss usually expressed?

Select	Answer
A	Decibels per 100 feet
B	Ohms per 100 feet
C	Decibels per 1,000 feet
D	Ohms per 1,000 feet

33. - G9B11

What is the approximate length for a 1/2 wave dipole antenna cut for 3.550 MHz?

Select	Answer
A	132 feet
B	42 feet
C	263 feet
D	84 feet

34. - G9C05

What is the primary effect of increasing boom length and adding directors to a Yagi antenna?

Select	Answer
A	Front-to-back ratio decreases
B	Gain increases
C	Beamwidth increases
D	Resonant frequency is lower

35. - G9D11

Which of the following is a disadvantage of multiband antennas?

Select	Answer
A	They present low impedance on all design frequencies
B	They must be fed with open wire line
C	They have poor harmonic rejection
D	They must be used with an antenna tuner