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

2. - G0B02

According to the National Electrical Code, what is the minimum wire size that may be used safely for wiring with a 20-ampere circuit breaker?

Select	Answer
A	AWG number 8
B	AWG number 16
C	AWG number 20
D	AWG number 12

3. - G1A10

What portion of the 10-meter band is available for repeater use?

Select	Answer
A	The entire band
B	The portion between 28.1 MHz and 28.2 MHz
C	The portion above 29.5 MHz
D	The portion between 28.3 MHz and 28.5 MHz

4. - G1B10

What is the power limit for beacon stations?

Select	Answer
A	200 watts PEP output
B	100 watts PEP output
C	20 watts PEP output
D	10 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 all third-party traffic
B	You must keep a record of the date, time, frequency, power level, and stations worked
C	You must keep a record of the manufacturer of your equipment and the antenna used
D	If you are using an antenna other than a dipole, you must keep a record of the gain of your antenna

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 must hold an FCC granted amateur radio license of General class or above
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’s home citizenship must be in ITU region 2

7. - G1E11

On what bands may automatically controlled stations transmitting RTTY or data emissions communicate with other automatically controlled digital stations?

Select	Answer
A	Anywhere in the non-phone segments of the 10-meter or shorter wavelength bands
B	On any band segment where digital operation is permitted
C	Anywhere in the 6-meter or shorter wavelength bands, and in limited segments of some of the HF bands
D	Only in the non-phone Extra Class segments of the bands

8. - G2A02

Which mode is most commonly used for voice communications on the 160-, 75-, and 40-meter bands?

Select	Answer
A	Upper sideband
B	Lower sideband
C	Double sideband
D	Suppressed sideband

9. - G2B09

Who may be the control operator of an amateur station transmitting in RACES to assist relief operations during a disaster?

Select	Answer
A	Only a person holding an FCC-issued amateur operator license
B	Any control operator when normal communication systems are operational
C	A person holding an FCC-issued amateur operator license or an appropriate government official
D	Only a RACES net control operator

10. - G2C01

Which of the following describes full break-in CW operation (QSK)?

Select	Answer
A	Transmitting stations can receive between code characters and elements
B	Automatic keyers, instead of hand keys, are used to send Morse code
C	An operator must activate a manual send/receive switch before and after every transmission
D	Breaking stations send the Morse code prosign “BK”

11. - G2D03

What procedure may be used by Volunteer Monitors to localize a station whose continuous carrier is holding a repeater on in their area?

Select	Answer
A	Compare vertical and horizontal signal strengths on the input frequency
B	Compare signal strengths between the input and output of the repeater
C	Compare beam headings on the repeater input from their home locations with that of other Volunteer Monitors
D	All these choices are correct

12. - G2E05

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

Select	Answer
A	SSB
B	DSB
C	USB
D	LSB

13. - G3A01

How does a higher sunspot number affect HF propagation?

Select	Answer
A	A zero sunspot number indicates that radio propagation is not possible on any band
B	Lower sunspot numbers generally indicate greater probability of sporadic E propagation
C	A zero sunspot number indicates undisturbed conditions
D	Higher sunspot numbers generally indicate a greater probability of good propagation at higher frequencies

14. - G3B07

What does LUF stand for?

Select	Answer
A	The Lowest Usable Frequency for communications between two specific points
B	Lowest Usable Frequency during the past 60 minutes
C	Lowest Usable Frequency for communications to any point outside a 100-mile radius
D	The Lowest Usable Frequency during a 24-hour period

15. - G3C08

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

Select	Answer
A	Only a small part of the signal energy is scattered into the skip zone
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	Propagation is via ground waves, which absorb most of the signal energy

16. - G4A06

What is the purpose of an antenna tuner?

Select	Answer
A	All these choices are correct
B	Reduce the SWR in the feed line to the antenna
C	Increase power transfer from the transmitter to the feed line
D	Reduce the power dissipation in the feedline to the antenna

17. - G4B11

Which of the following must be connected to an antenna analyzer when it is being used for SWR measurements?

Select	Answer
A	Antenna and feed line
B	Receiver
C	Transmitter
D	All these choices are correct

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. - 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	14.344 MHz to 14.347 MHz
C	14.347 MHz to 14.647 MHz
D	14.3455 MHz to 14.3485 MHz

20. - G4E09

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

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

21. - G5A11

What letter is used to represent reactance?

Select	Answer
A	Z
B	B
C	X
D	Y

22. - G5B04

How many watts of electrical power are consumed by a 12 VDC light bulb that draws 0.2 amperes?

Select	Answer
A	2.4 watts
B	6 watts
C	60 watts
D	24 watts

23. - G5C07

What transformer turns ratio matches an antenna’s 600-ohm feed point impedance to a 50-ohm coaxial cable?

Select	Answer
A	3.5 to 1
B	12 to 1
C	144 to 1
D	24 to 1

24. - G6A11

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

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

25. - G6B07

Which of the following describes a type N connector?

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

26. - G7A04

What is characteristic of a half-wave rectifier in a power supply?

Select	Answer
A	Only one diode is required
B	The output voltage is two times the peak input voltage
C	More current can be drawn from the half-wave rectifier
D	The ripple frequency is twice that of a full-wave rectifier

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	Multiply the RF input power by the reciprocal of the RF output power
C	Divide the RF output power by the DC input power
D	Add the RF input power to the DC output power

28. - G7C02

What output is produced by a balanced modulator?

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

29. - G8A01

How is direct binary FSK modulation generated?

Select	Answer
A	By changing an oscillator’s frequency directly with a digital control signal
B	By reconfiguring the CW keying input to act as a tone generator
C	By using a transceiver’s computer data interface protocol to change frequencies
D	By keying an FM transmitter with a sub-audible tone

30. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

Select	Answer
A	Higher symbol rates require wider bandwidth
B	Bandwidth is half the symbol rate
C	Lower symbol rates require wider bandwidth
D	Symbol rate and bandwidth are not related

31. - G8C01

On what band do amateurs share channels with the unlicensed Wi-Fi service?

Select	Answer
A	2.4 GHz
B	902 MHz
C	10.7 GHz
D	432 MHz

32. - G9A05

How does the attenuation of coaxial cable change with increasing frequency?

Select	Answer
A	Attenuation decreases
B	Attenuation increases
C	Attenuation follows Marconi’s Law of Attenuation
D	Attenuation is independent of frequency

33. - G9B08

How does the feed point impedance of a 1/2 wave dipole change as the feed point is moved from the center toward the ends?

Select	Answer
A	It steadily increases
B	It steadily decreases
C	It is unaffected by the location of the feed point
D	It peaks at about 1/8 wavelength from the end

34. - G9C09

In free space, how does the gain of two three-element, horizontally polarized Yagi antennas spaced vertically 1/2 wavelength apart typically compare to the gain of a single three-element Yagi?

Select	Answer
A	Approximately 1.5 dB higher
B	Approximately 9 dB higher
C	Approximately 3 dB higher
D	Approximately 6 dB higher

35. - G9D06

Which of the following is an advantage of a log-periodic antenna?

Select	Answer
A	Polarization diversity
B	Wide bandwidth
C	Harmonic suppression
D	Higher gain per element than a Yagi antenna