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. - G0A04

What does “time averaging” mean when evaluating RF radiation exposure?

Select	Answer
A	The average amount of power developed by the transmitter over a specific 24-hour period
B	The total RF exposure averaged over a certain period
C	The total time of the exposure
D	The average time it takes RF radiation to have any long-term effect on the body

2. - G0B05

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

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

3. - G1A04

Which of the following amateur bands is restricted to communication only on specific channels, rather than frequency ranges?

Select	Answer
A	12 meters
B	11 meters
C	30 meters
D	60 meters

4. - G1B07

What are the restrictions on the use of abbreviations or procedural signals in the amateur service?

Select	Answer
A	They may be used if they do not obscure the meaning of a message
B	They are not permitted
C	Only “Q” signals are permitted
D	They are limited to those expressly listed in Part 97 of the FCC rules

5. - G1C06

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

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

6. - G1D09

How long is a Certificate of Successful Completion of Examination (CSCE) valid for exam element credit?

Select	Answer
A	For as long as your current license is valid
B	365 days
C	180 days
D	30 days

7. - G1E09

Under what circumstances are messages that are sent via digital modes exempt from Part 97 third-party rules that apply to other modes of communication?

Select	Answer
A	Under no circumstances
B	When messages are not encrypted
C	When under automatic control
D	When messages are encrypted

8. - G2A08

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

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

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

10. - G2C11

What does the Q signal “QRV” mean?

Select	Answer
A	You are sending too fast
B	I am quitting for the day
C	There is interference on the frequency
D	I am ready to receive

11. - G2D10

What is QRP operation?

Select	Answer
A	Traffic relay procedure net operation
B	Remote piloted model control
C	Low-power transmit operation
D	Transmission using Quick Response Protocol

12. - G2E11

What is the primary purpose of an Amateur Radio Emergency Data Network (AREDN) mesh network?

Select	Answer
A	To provide high-speed data services during an emergency or community event
B	To provide FM repeater coverage in remote areas
C	To provide DX spotting reports to aid contesters and DXers
D	To provide real time propagation data by monitoring amateur radio transmissions worldwide

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	It disrupts communications via satellite more than direct communications
C	It disrupts signals on lower frequencies more than those on higher frequencies
D	None, because only areas on the night side of the Earth are affected

14. - G3B04

Which of the following is a way to determine current propagation on a desired band from your station?

Select	Answer
A	Send a series of dots and listen for echoes
B	Use a network of automated receiving stations on the internet to see where your transmissions are being received
C	All these choices are correct
D	Check the A-index

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

16. - G4A01

What is the purpose of the notch filter found on many HF transceivers?

Select	Answer
A	To remove interfering splatter generated by signals on adjacent frequencies
B	To eliminate receiver interference from impulse noise sources
C	To reduce interference from carriers in the receiver passband
D	To restrict the transmitter voice bandwidth

17. - G4B07

What signals are used to conduct a two-tone test?

Select	Answer
A	Two swept frequency tones
B	Two non-harmonically related audio signals
C	Two audio frequency range square wave signals of equal amplitude
D	Two audio signals of the same frequency shifted 90 degrees

18. - G4C11

What technique helps to minimize RF “hot spots” in an amateur station?

Select	Answer
A	Bonding all equipment enclosures together
B	Building all equipment in a metal enclosure
C	Using surge suppressor power outlets
D	Placing low-pass filters on all feed lines

19. - G4D11

How close to the upper edge of a band’s phone segment should your displayed carrier frequency be when using 3 kHz wide USB?

Select	Answer
A	At least 3 kHz above the edge of the band
B	At least 3 kHz below the edge of the band
C	At least 1 kHz above the edge of the segment
D	At least 1 kHz below the edge of the segment

20. - G4E07

Which of the following may cause receive interference to an HF transceiver installed in a vehicle?

Select	Answer
A	The fuel delivery system
B	All these choices are correct
C	The battery charging system
D	The control computers

21. - G5A09

What unit is used to measure reactance?

Select	Answer
A	Siemens
B	Ampere
C	Farad
D	Ohm

22. - G5B11

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

Select	Answer
A	0.707
B	1.414
C	1.00
D	2.00

23. - G5C04

What is the approximate total resistance of a 100- and a 200-ohm resistor in parallel?

Select	Answer
A	300 ohms
B	150 ohms
C	67 ohms
D	75 ohms

24. - G6A10

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

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

25. - G6B10

How does a ferrite bead or core reduce common-mode RF current on the shield of a coaxial cable?

Select	Answer
A	By creating an out-of-phase current to cancel the common-mode current
B	It converts common-mode current to differential mode current
C	By creating an impedance in the current’s path
D	Ferrites expel magnetic fields

26. - G7A02

Which of the following components are used in a power supply filter network?

Select	Answer
A	All these choices are correct
B	Diodes
C	Transformers and transducers
D	Capacitors and inductors

27. - G7B09

What determines the frequency of an LC oscillator?

Select	Answer
A	The number of stages in the divider
B	The time delay of the lag circuit
C	The inductance and capacitance in the tank circuit
D	The number of stages in the counter

28. - G7C08

Which parameter affects receiver sensitivity?

Select	Answer
A	Input amplifier gain
B	Demodulator stage bandwidth
C	Input amplifier noise figure
D	All these choices are correct

29. - G8A12

What is QPSK modulation?

Select	Answer
A	Modulation using quadra-pole sideband keying to generate spread spectrum signals
B	Modulation in which digital data is transmitted using 0-, 90-, 180- and 270-degrees phase shift to represent pairs of bits
C	Modulation using Fast Fourier Transforms to generate frequencies at the first, second, third, and fourth harmonics of the carrier frequency to improve noise immunity
D	Modulation using quasi-parallel to serial conversion to reduce bandwidth

30. - G8B09

Why is it good to match receiver bandwidth to the bandwidth of the operating mode?

Select	Answer
A	It results in the best signal-to-noise ratio
B	It is required by FCC rules
C	It minimizes power consumption in the receiver
D	It improves impedance matching of the antenna

31. - G8C14

Which of the following describes a waterfall display?

Select	Answer
A	Frequency is horizontal, signal strength is vertical, time is intensity
B	Frequency is horizontal, signal strength is intensity, time is vertical
C	Frequency is vertical, signal strength is horizontal, time is intensity
D	Frequency is vertical, signal strength is intensity, time is horizontal

32. - G9A01

Which of the following factors determine the characteristic impedance of a parallel conductor feed line?

Select	Answer
A	The distance between the centers of the conductors and the length of the line
B	The distance between the centers of the conductors and the radius of the conductors
C	The frequency of the signal and the length of the line
D	The radius of the conductors and the frequency of the signal

33. - G9B09

Which of the following is an advantage of using a horizontally polarized as compared to a vertically polarized HF antenna?

Select	Answer
A	Lower radiation resistance
B	Lower feed point impedance
C	Shorter radials
D	Lower ground losses

34. - G9C04

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

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

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	Opposite the feed point
C	Broadside to the plane of the halo
D	Omnidirectional in the plane of the halo