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. - G0A06

What must you do if your station fails to meet the FCC RF exposure exemption criteria?

Select	Answer
A	Perform an RF exposure evaluation in accordance with World Meteorological Organization guidelines
B	Use an FCC-approved band-pass filter
C	Contact the FCC for permission to transmit
D	Perform an RF Exposure Evaluation in accordance with FCC OET Bulletin 65

2. - G0B13

Where should lightning arrestors be located?

Select	Answer
A	On the antenna, opposite the feed point
B	In series with each ground lead
C	Where the feed lines enter the building
D	At the closest power pole ground electrode

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

4. - G1B08

When is it permissible to communicate with amateur stations in countries outside the areas administered by the Federal Communications Commission?

Select	Answer
A	Only when the foreign country has a formal third-party agreement filed with the FCC
B	Only when the contact is with amateurs licensed by a country which is a member of the International Amateur Radio Union, or by a territory possessed by such a country
C	Only when the contact is with amateurs licensed by a country which is a member of the United Nations, or by a territory possessed by such a country
D	When the contact is with amateurs in any country except those whose administrations have notified the ITU that they object to such communications

5. - G1C08

What is the maximum symbol rate permitted for RTTY or data emission transmitted at frequencies below 28 MHz?

Select	Answer
A	300 baud
B	19.6 kilobaud
C	1200 baud
D	56 kilobaud

6. - G1D08

Which of the following criteria must be met for a non-US citizen to be an accredited Volunteer Examiner?

Select	Answer
A	The person’s home citizenship must be in ITU region 2
B	None of these choices is correct; a non-US citizen cannot be a Volunteer Examiner
C	The person must be a resident of the US for a minimum of 5 years
D	The person must hold an FCC granted amateur radio license of General class or above

7. - G1E08

What is the maximum PEP output allowed for spread spectrum transmissions?

Select	Answer
A	1500 watts
B	100 watts
C	100 milliwatts
D	10 watts

8. - G2A06

Which of the following is an advantage of using single sideband, as compared to other analog voice modes on the HF amateur bands?

Select	Answer
A	Less subject to interference from atmospheric static crashes
B	Ease of tuning on receive and immunity to impulse noise
C	Less bandwidth used and greater power efficiency
D	Very high-fidelity voice modulation

9. - G2B11

How often may RACES training drills and tests be routinely conducted without special authorization?

Select	Answer
A	No more than 2 hours per week
B	No more than 1 hour per week
C	No more than 1 hour per month
D	No more than 2 hours per month

10. - G2C08

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

Select	Answer
A	KN
B	BK
C	AR
D	SK

11. - G2D08

Why do many amateurs keep a station log?

Select	Answer
A	The FCC requires a log of all international contacts
B	To help with a reply if the FCC requests information about your station
C	The log provides evidence of operation needed to renew a license without retest
D	The FCC requires a log of all international third-party traffic

12. - G2E12

Which of the following describes Winlink?

Select	Answer
A	A wireless network capable of both VHF and HF band operation
B	All of the above
C	A form of Packet Radio
D	An amateur radio wireless network to send and receive email on the internet

13. - G3A06

What is a geomagnetic storm?

Select	Answer
A	A thunderstorm that affects radio propagation
B	A temporary disturbance in Earth’s geomagnetic field
C	Ripples in the geomagnetic force
D	A sudden drop in the solar flux index

14. - G3B06

What usually happens to radio waves with frequencies below the LUF?

Select	Answer
A	They are refracted and trapped in the ionosphere to circle Earth
B	They are refracted back to Earth
C	They pass through the ionosphere
D	They are attenuated before reaching the destination

15. - G3C07

What makes HF scatter signals often sound distorted?

Select	Answer
A	Ground waves are absorbing much of the signal
B	Energy is scattered into the skip zone through several different paths
C	The E region is not present
D	The ionospheric region involved is unstable

16. - G4A10

What is the function of an electronic keyer?

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

17. - G4B12

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

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

18. - G4C08

Which of the following would reduce RF interference caused by common-mode current on an audio cable?

Select	Answer
A	Ground the center conductor of the audio cable causing the interference
B	Place a ferrite choke on the cable
C	Connect the center conductor to the shield of all cables to short circuit the RFI signal
D	Add an additional insulating jacket to the cable

19. - G4D09

What frequency range is occupied by a 3 kHz USB signal with the displayed carrier frequency set to 14.347 MHz?

Select	Answer
A	14.347 MHz to 14.350 MHz
B	14.3455 MHz to 14.3485 MHz
C	14.347 MHz to 14.647 MHz
D	14.344 MHz to 14.347 MHz

20. - G4E04

Why should DC power for a 100-watt HF transceiver not be supplied by a vehicle’s auxiliary power socket?

Select	Answer
A	Drawing more than 50 watts from this socket could cause the engine to overheat
B	The DC polarity of the socket is reversed from the polarity of modern HF transceivers
C	The socket’s wiring may be inadequate for the current drawn by the transceiver
D	The socket is not wired with an RF-shielded power cable

21. - G5A08

What is impedance?

Select	Answer
A	The product of current and reactance
B	The ratio of voltage to current
C	The ratio of current to voltage
D	The product of current and voltage

22. - G5B06

What is the PEP produced by 200 volts peak-to-peak across a 50-ohm dummy load?

Select	Answer
A	100 watts
B	400 watts
C	1.4 watts
D	353.5 watts

23. - G5C04

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

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

24. - G6A09

Which of the following describes MOSFET construction?

Select	Answer
A	The gate is separated from the channel by a thin insulating layer
B	The source is formed by depositing metal on silicon
C	The gate is formed by a back-biased junction
D	The source is separated from the drain by a thin insulating layer

25. - G6B07

Which of the following describes a type N connector?

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

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. - G7B08

How is the efficiency of an RF power amplifier determined?

Select	Answer
A	Divide the DC input power by the DC output power
B	Add the RF input power to the DC output power
C	Divide the RF output power by the DC input power
D	Multiply the RF input power by the reciprocal of the RF output power

28. - G7C09

What is the phase difference between the I and Q RF signals that software-defined radio (SDR) equipment uses for modulation and demodulation?

Select	Answer
A	Zero
B	45 degrees
C	90 degrees
D	180 degrees

29. - G8A06

Which of the following is characteristic of QPSK31?

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

30. - G8B03

What is another term for the mixing of two RF signals?

Select	Answer
A	Frequency inversion
B	Phase inversion
C	Heterodyning
D	Synthesizing

31. - G8C05

In an ARQ mode, what is meant by a NAK response to a transmitted packet?

Select	Answer
A	Packet was received without error
B	Request retransmission of the packet
C	Receiving station connected and ready for transmissions
D	Entire file received correctly

32. - G9A02

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

Select	Answer
A	There is no relationship between transmission line loss and SWR
B	High SWR reduces the relative effect of transmission line loss
C	High SWR increases loss in a lossy transmission line
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	Isotropic
C	Omnidirectional in azimuth
D	Hemispherical

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

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