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

2. - G0B11

Which of the following is required for lightning protection ground rods?

Select	Answer
A	They must be bonded to all buried water and gas lines
B	Lightning grounds must be connected to all ungrounded wiring
C	They must be bonded together with all other grounds
D	Bends in ground wires must be made as close as possible to a right angle

3. - G1A08

Which HF bands have segments exclusively allocated to Amateur Extra licensees?

Select	Answer
A	All HF bands
B	60 meters, 30 meters, 17 meters, and 12 meters
C	80 meters, 40 meters, 20 meters, and 15 meters
D	All HF bands except 160 meters and 10 meters

4. - G1B10

What is the power limit for beacon stations?

Select	Answer
A	20 watts PEP output
B	10 watts PEP output
C	100 watts PEP output
D	200 watts PEP output

5. - G1C04

Which of the following is required by the FCC rules when operating in the 60-meter band?

Select	Answer
A	You must keep a record of the manufacturer of your equipment and the antenna used
B	You must keep a record of all third-party traffic
C	You must keep a record of the date, time, frequency, power level, and stations worked
D	If you are using an antenna other than a dipole, you must keep a record of the gain of your antenna

6. - G1D02

What license examinations may you administer as an accredited Volunteer Examiner holding a General class operator license?

Select	Answer
A	None, only Amateur Extra class licensees may be accredited
B	Technician only
C	Amateur Extra, General, and Technician
D	General and Technician

7. - G1E10

Why should an amateur operator normally avoid transmitting on 14.100, 18.110, 21.150, 24.930 and 28.200 MHz?

Select	Answer
A	A system of propagation beacon stations operates on those frequencies
B	These frequencies are set aside for bulletins from the FCC
C	These frequencies are set aside for emergency operations
D	A system of automatic digital stations operates on those frequencies

8. - G2A07

Which of the following statements is true of single sideband (SSB)?

Select	Answer
A	Only one sideband and the carrier are transmitted; the other sideband is suppressed
B	Only one sideband is transmitted; the other sideband and carrier are suppressed
C	SSB is the only voice mode authorized on the 160-, 75-, and 40-meter amateur bands
D	SSB is the only voice mode authorized on the 20-, 15-, and 10-meter amateur bands

9. - G2B07

Which of the following complies with commonly accepted amateur practice when choosing a frequency on which to initiate a call?

Select	Answer
A	Follow the voluntary band plan
B	Identify your station by transmitting your call sign at least 3 times
C	All these choices are correct
D	Listen on the frequency for at least two minutes to be sure it is clear

10. - G2C08

What prosign is sent to indicate the end of a formal message when using CW?

Select	Answer
A	AR
B	KN
C	BK
D	SK

11. - G2D09

Which of the following is required when participating in a contest on HF frequencies?

Select	Answer
A	Identify your station according to normal FCC regulations
B	Submit a log to the contest sponsor
C	All these choices are correct
D	Send a QSL card to the stations worked, or QSL via Logbook of The World

12. - G2E02

What is VARA?

Select	Answer
A	A low signal-to-noise digital mode used for EME (moonbounce)
B	A digital protocol used with Winlink
C	A DX spotting system using a network of software defined radios
D	A radio direction finding system used on VHF and UHF

13. - G3A11

How long does it take a coronal mass ejection to affect radio propagation on Earth?

Select	Answer
A	28 days
B	4 to 8 minutes
C	15 hours to several days
D	14 days

14. - G3B05

How does the ionosphere affect radio waves with frequencies below the MUF and above the LUF?

Select	Answer
A	They are refracted and trapped in the ionosphere to circle Earth
B	They are amplified by interaction with the ionosphere
C	They pass through the ionosphere
D	They are refracted back to Earth

15. - G3C05

Why is long-distance communication on the 40-, 60-, 80-, and 160-meter bands more difficult during the day?

Select	Answer
A	The F region is unstable during daylight hours
B	The F region absorbs signals at these frequencies during daylight hours
C	The E region is unstable during daylight hours
D	The D region absorbs signals at these frequencies during daylight hours

16. - G4A11

Why should the ALC system be inactive when transmitting AFSK data signals?

Select	Answer
A	When using digital modes, too much ALC activity can cause the transmitter to overheat
B	The ALC action distorts the signal
C	All these choices are correct
D	ALC will invert the modulation of the AFSK mode

17. - G4B08

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

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

18. - G4C04

What sound is heard from an audio device experiencing RF interference from a CW transmitter?

Select	Answer
A	A CW signal at a nearly pure audio frequency
B	On-and-off humming or clicking
C	Severely distorted audio
D	A chirpy CW signal

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

20. - G4E09

What is the approximate open-circuit voltage from a fully illuminated silicon photovoltaic cell?

Select	Answer
A	0.5 VDC
B	0.2 VDC
C	1.38 VDC
D	0.02 VDC

21. - G5A11

What letter is used to represent reactance?

Select	Answer
A	Y
B	Z
C	X
D	B

22. - G5B11

What is the ratio of PEP to average power for an unmodulated carrier?

Select	Answer
A	0.707
B	1.00
C	1.414
D	2.00

23. - G5C05

Why is the primary winding wire of a voltage step-up transformer usually a larger size than that of the secondary winding?

Select	Answer
A	To ensure that the volume of the primary winding is equal to the volume of the secondary winding
B	To prevent parasitic oscillations due to resistive losses in the primary
C	To improve the coupling between the primary and secondary
D	To accommodate the higher current of the primary

24. - G6A11

What happens when an inductor is operated above its self-resonant frequency?

Select	Answer
A	It becomes capacitive
B	Harmonics are generated
C	Catastrophic failure is likely
D	Its reactance increases

25. - G6B08

How is an LED biased when emitting light?

Select	Answer
A	Reverse biased
B	Forward biased
C	In the tunnel-effect region
D	At the Zener voltage

26. - G7A06

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

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

27. - G7B05

How many states does a 3-bit binary counter have?

Select	Answer
A	3
B	6
C	8
D	16

28. - G7C02

What output is produced by a balanced modulator?

Select	Answer
A	Audio with equalized frequency response
B	Audio extracted from the modulation signal
C	Frequency modulated RF
D	Double-sideband modulated RF

29. - G8A06

Which of the following is characteristic of QPSK31?

Select	Answer
A	All these choices are correct
B	Its encoding provides error correction
C	Its bandwidth is approximately the same as BPSK31
D	It is sideband sensitive

30. - G8B02

What is the term for interference from a signal at twice the IF frequency from the desired signal?

Select	Answer
A	Mixer interference
B	Intermediate interference
C	Image response
D	Quadrature response

31. - G8C04

Which of the following describes Baudot code?

Select	Answer
A	A code using SELCAL and LISTEN
B	A 5-bit code with additional start and stop bits
C	A 7-bit code with start, stop, and parity bits
D	A code using error detection and correction

32. - G9A02

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

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

33. - G9B04

What is the radiation pattern of a dipole antenna in free space in a plane containing the conductor?

Select	Answer
A	It is a figure-eight off both ends of the antenna
B	It is a figure-eight at right angles to the antenna
C	It is a circle (equal radiation in all directions)
D	It has a pair of lobes on one side of the antenna and a single lobe on the other side

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	Beamwidth increases
C	Gain increases
D	Resonant frequency is lower

35. - G9D02

What is the feed point impedance of an end-fed half-wave antenna?

Select	Answer
A	Approximately 300 ohms
B	Approximately 50 ohms
C	Very low
D	Very high