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. - G0A02

Which of the following is used to determine RF exposure from a transmitted signal?

Select	Answer
A	Its duty cycle
B	Its frequency
C	All these choices are correct
D	Its power density

2. - G0B07

Which of these choices should be observed when climbing a tower using a safety harness?

Select	Answer
A	Ensure that all heavy tools are securely fastened to the harness
B	Always hold on to the tower with one hand
C	All these choices are correct
D	Confirm that the harness is rated for the weight of the climber and that it is within its allowable service life

3. - G1A07

On which amateur frequencies in the 10-meter band may stations with a General class control operator transmit CW emissions?

Select	Answer
A	28.025 MHz to 28.300 MHz only
B	The entire band
C	28.000 MHz to 28.300 MHz only
D	28.000 MHz to 28.025 MHz only

4. - G1B09

On what HF frequencies are automatically controlled beacons permitted?

Select	Answer
A	28.20 MHz to 28.30 MHz
B	On any frequency if power is less than 1 watt
C	21.08 MHz to 21.09 MHz
D	On any frequency if transmissions are in Morse code

5. - G1C07

What must be done before using a new digital protocol on the air?

Select	Answer
A	Type-certify equipment to FCC standards
B	Publicly document the technical characteristics of the protocol
C	Obtain an experimental license from the FCC
D	Submit a rule-making proposal to the FCC describing the codes and methods of the technique

6. - G1D01

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

Select	Answer
A	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
B	Anyone who held an FCC-issued amateur radio license that expired not less than 5 and not more than 15 years ago
C	Only persons who once held an FCC issued Novice, Technician, or Technician Plus license
D	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

7. - G1E04

Which of the following conditions require a licensed amateur radio operator to take specific steps to avoid harmful interference to other users or facilities?

Select	Answer
A	All these choices are correct
B	When a station is transmitting spread spectrum emissions
C	When using a band where the Amateur Service is secondary
D	When operating within one mile of an FCC Monitoring Station

8. - G2A10

Which of the following statements is true of VOX operation versus PTT operation?

Select	Answer
A	It allows “hands free” operation
B	It provides more power output
C	The received signal is more natural sounding
D	It occupies less bandwidth

9. - G2B04

When selecting a CW transmitting frequency, what minimum separation from other stations should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	1 kHz to 3 kHz
B	3 kHz to 6 kHz
C	150 Hz to 500 Hz
D	5 Hz to 50 Hz

10. - G2C03

What does it mean when a CW operator sends “KN” at the end of a transmission?

Select	Answer
A	Listening only for a specific station or stations
B	Closing station now
C	Operating full break-in
D	No US stations should call

11. - G2D11

Why are signal reports typically exchanged at the beginning of an HF contact?

Select	Answer
A	To allow each station to operate according to conditions
B	To follow standard radiogram structure
C	To be sure the contact will count for award programs
D	To allow each station to calibrate their frequency display

12. - G2E01

Which mode is normally used when sending RTTY signals via AFSK with an SSB transmitter?

Select	Answer
A	CW
B	DSB
C	USB
D	LSB

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	Rotation of the Sun’s surface layers around its axis
C	Cyclic variation in Earth’s radiation belts
D	The position of the Moon in its orbit

14. - G3B11

What happens to HF propagation when the LUF exceeds the MUF?

Select	Answer
A	Propagation via ordinary skywave communications is not possible over that path
B	HF communications over the path are enhanced
C	Double-hop propagation along the path is more common
D	Propagation over the path on all HF frequencies is enhanced

15. - G3C08

Why are HF scatter signals in the skip zone usually weak?

Select	Answer
A	Propagation is via ground waves, which absorb most of the signal energy
B	Signals are scattered from the magnetosphere, which is not a good reflector
C	Propagation is via ducts in the F region, which absorb most of the energy
D	Only a small part of the signal energy is scattered into the skip zone

16. - G4A10

What is the function of an electronic keyer?

Select	Answer
A	To allow time for switching the antenna from the receiver to the transmitter
B	Automatic generation of dots and dashes for CW operation
C	Computer interface for PSK and RTTY operation
D	Automatic transmit/receive switching

17. - G4B08

What transmitter performance parameter does a two-tone test analyze?

Select	Answer
A	Linearity
B	Percentage of frequency modulation
C	Percentage of carrier phase shift
D	Percentage of suppression of the carrier and undesired sideband for SSB

18. - G4C03

What sound is heard from an audio device experiencing RF interference from a single sideband phone transmitter?

Select	Answer
A	Clearly audible speech
B	Distorted speech
C	On-and-off humming or clicking
D	A steady hum whenever the transmitter is on the air

19. - G4D05

How does a signal that reads 20 dB over S9 compare to one that reads S9 on a receiver, assuming a properly calibrated S meter?

Select	Answer
A	It is 20 times more powerful
B	It is 10 times less powerful
C	It is 20 times less powerful
D	It is 100 times more powerful

20. - G4E01

What is the purpose of a capacitance hat on a mobile antenna?

Select	Answer
A	To electrically lengthen a physically short antenna
B	To increase the power handling capacity of a whip antenna
C	To reduce radiation resistance
D	To lower the radiation angle

21. - G5A09

What unit is used to measure reactance?

Select	Answer
A	Siemens
B	Ampere
C	Ohm
D	Farad

22. - G5B07

What value of an AC signal produces the same power dissipation in a resistor as a DC voltage of the same value?

Select	Answer
A	The RMS value
B	The peak-to-peak value
C	The reciprocal of the RMS value
D	The peak value

23. - G5C02

What 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?

Select	Answer
A	The input voltage is multiplied by 4
B	Additional resistance must be added in series with the primary to prevent overload
C	The input voltage is divided by 4
D	Additional resistance must be added in parallel with the secondary to prevent overload

24. - G6A12

What is the primary purpose of a screen grid in a vacuum tube?

Select	Answer
A	To increase efficiency
B	To increase the control grid resistance
C	To decrease plate resistance
D	To reduce grid-to-plate capacitance

25. - G6B12

Which of these connector types is commonly used for low frequency or dc signal connections to a transceiver?

Select	Answer
A	BNC
B	RCA Phono
C	Type N
D	PL-259

26. - G7A05

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

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

27. - G7B03

Which of the following describes the function of a two-input AND gate?

Select	Answer
A	Output is high when either or both inputs are low
B	Output is low only when both inputs are high
C	Output is low when either or both inputs are high
D	Output is high only when both inputs are high

28. - G7C14

The bandwidth of a band-pass filter is measured between what two frequencies?

Select	Answer
A	Cutoff and rolloff
B	Pole and zero
C	Upper and lower half-power
D	Image and harmonic

29. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

Select	Answer
A	Phase modulation
B	Single sideband
C	Vestigial sideband
D	Frequency modulation

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 sum and difference
D	The arithmetic product

31. - G8C08

Which of the following statements is true about PSK31?

Select	Answer
A	Higher power is needed as compared to RTTY for similar error rates
B	Upper case letters are sent with more power
C	Upper case letters use longer Varicode bit sequences and thus slow down transmission
D	Error correction is used to ensure accurate message reception

32. - G9A02

What is the relationship between high standing wave ratio (SWR) and transmission line loss?

Select	Answer
A	High SWR increases loss in a lossy transmission line
B	There is no relationship between transmission line loss and SWR
C	High SWR reduces the relative effect of transmission line loss
D	High SWR makes it difficult to measure transmission line loss

33. - G9B03

Which of the following best describes the radiation pattern of a quarter-wave ground-plane vertical antenna?

Select	Answer
A	Bi-directional in azimuth
B	Omnidirectional in azimuth
C	Isotropic
D	Hemispherical

34. - G9C05

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

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

35. - G9D03

In which direction is the maximum radiation from a VHF/UHF “halo” antenna?

Select	Answer
A	On the same side as the feed point
B	Omnidirectional in the plane of the halo
C	Opposite the feed point
D	Broadside to the plane of the halo