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. - G0A09

What type of instrument can be used to accurately measure an RF field strength?

Select	Answer
A	An SWR meter with a peak-reading function
B	A calibrated field strength meter with a calibrated antenna
C	A receiver with digital signal processing (DSP) noise reduction
D	An oscilloscope with a high-stability crystal marker generator

2. - G0B05

Which of the following conditions will cause a ground fault circuit interrupter (GFCI) to disconnect AC power?

Select	Answer
A	Current flowing from one or more of the hot wires directly to ground
B	Overvoltage on the hot wires
C	All these choices are correct
D	Current flowing from one or more of the hot wires to the neutral wire

3. - G1A09

Which of the following frequencies is within the General class portion of the 15-meter band?

Select	Answer
A	14250 kHz
B	18155 kHz
C	21300 kHz
D	24900 kHz

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	100 feet
B	50 feet
C	200 feet
D	250 feet

5. - G1C06

What is the limit for transmitter power on the 1.8 MHz band?

Select	Answer
A	1500 watts PEP output
B	1200 watts PEP output
C	1000 watts PEP output
D	200 watts PEP output

6. - G1D07

Volunteer Examiners are accredited by what organization?

Select	Answer
A	The Wireless Telecommunications Bureau
B	The Federal Communications Commission
C	A Volunteer Examiner Coordinator
D	The Universal Licensing System

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 using a band where the Amateur Service is secondary
C	When operating within one mile of an FCC Monitoring Station
D	When a station is transmitting spread spectrum emissions

8. - G2A11

Generally, who should respond to a station in the contiguous 48 states calling “CQ DX”?

Select	Answer
A	Only contest stations
B	Any caller is welcome to respond
C	Only stations in Germany
D	Any stations outside the lower 48 states

9. - G2B10

Which of the following is good amateur practice for net management?

Select	Answer
A	All these choices are correct
B	Transmit the full net roster at the beginning of every session
C	Always use multiple sets of phonetics during check-in
D	Have a backup frequency in case of interference or poor conditions

10. - G2C10

What does the Q signal “QRN” mean?

Select	Answer
A	Zero beat my signal
B	Send more slowly
C	Stop sending
D	I am troubled by static

11. - G2D01

What is the Volunteer Monitor Program?

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

12. - G2E05

What is the standard sideband for JT65, JT9, FT4, or FT8 digital signal when using AFSK?

Select	Answer
A	DSB
B	USB
C	LSB
D	SSB

13. - G3A02

What effect does a sudden ionospheric disturbance have on the daytime ionospheric propagation?

Select	Answer
A	It enhances propagation on all HF frequencies
B	None, because only areas on the night side of the Earth are affected
C	It disrupts signals on lower frequencies more than those on higher frequencies
D	It disrupts communications via satellite more than direct communications

14. - G3B09

What is the approximate maximum distance along the Earth’s surface normally covered in one hop using the F2 region?

Select	Answer
A	12,000 miles
B	180 miles
C	1,200 miles
D	2,500 miles

15. - G3C06

What is a characteristic of HF scatter?

Select	Answer
A	Signals have a fluttering sound
B	There are very large, sudden swings in signal strength
C	Scatter propagation occurs only at night
D	Phone signals have high intelligibility

16. - G4A11

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

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

17. - G4B12

What effect can strong signals from nearby transmitters have on an antenna analyzer?

Select	Answer
A	All these choices are correct
B	Received power that interferes with SWR readings
C	Generation of harmonics which interfere with frequency readings
D	Desensitization which can cause intermodulation products which interfere with impedance readings

18. - G4C04

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

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

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

20. - G4E01

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

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

21. - G5A01

What happens when inductive and capacitive reactance are equal in a series LC circuit?

Select	Answer
A	Resonance causes impedance to be very low
B	Impedance is equal to the arithmetic mean of the inductance and capacitance
C	Resonance causes impedance to be very high
D	Impedance is equal to the geometric mean of the inductance and capacitance

22. - G5B10

What percentage of power loss is equivalent to a loss of 1 dB?

Select	Answer
A	25.9 percent
B	10.9 percent
C	20.6 percent
D	12.2 percent

23. - G5C12

What is the capacitance of a 20-microfarad capacitor connected in series with a 50-microfarad capacitor?

Select	Answer
A	1,000 microfarads
B	0.07 microfarads
C	70 microfarads
D	14.3 microfarads

24. - G6A08

Which of the following is characteristic of low voltage ceramic capacitors?

Select	Answer
A	Tight tolerance
B	High stability
C	Comparatively low cost
D	High capacitance for given volume

25. - G6B07

Which of the following describes a type N connector?

Select	Answer
A	A small bayonet connector used for data circuits
B	A nickel plated version of the PL-259
C	A low noise figure VHF connector
D	A moisture-resistant RF connector useful to 10 GHz

26. - G7A08

Which of the following is characteristic of a switchmode power supply as compared to a linear power supply?

Select	Answer
A	High-frequency operation allows the use of smaller components
B	Faster switching time makes higher output voltage possible
C	Inherently more stable
D	Fewer circuit components are required

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	All these choices are correct
D	FM

28. - G7C14

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

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

29. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

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

30. - G8B04

What is the stage in a VHF FM transmitter that generates a harmonic of a lower frequency signal to reach the desired operating frequency?

Select	Answer
A	Mixer
B	Balanced converter
C	Multiplier
D	Reactance modulator

31. - G8C08

Which of the following statements is true about PSK31?

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

32. - G9A11

What is the effect of transmission line loss on SWR measured at the input to the line?

Select	Answer
A	Transmission line loss does not affect the SWR measurement
B	Higher loss increases SWR measured at the input to the line
C	Higher loss reduces SWR measured at the input to the line
D	Higher loss increases the accuracy of SWR measured at the input to the line

33. - G9B12

What is the approximate length for a 1/4 wave monopole antenna cut for 28.5 MHz?

Select	Answer
A	16 feet
B	11 feet
C	21 feet
D	8 feet

34. - G9C04

How does antenna gain in dBi compare to gain stated in dBd for the same antenna?

Select	Answer
A	Gain in dBi is 2.15 dB lower
B	Gain in dBd is 1.25 dBd lower
C	Gain in dBd is 1.25 dBd higher
D	Gain in dBi is 2.15 dB higher

35. - G9D01

Which 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?

Select	Answer
A	A horizontal dipole placed between 1/10 and 1/4 wavelength above the ground
B	A vertical dipole placed at approximately 1/2 wavelength above the ground
C	A horizontal dipole placed at approximately 1/2 wavelength above the ground
D	A vertical antenna placed between 1/4 and 1/2 wavelength above the ground