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

2. - G0B01

Which wire or wires in a four-conductor 240 VAC circuit should be attached to fuses or circuit breakers?

Select	Answer
A	Only the hot wires
B	All wires
C	Only the ground wire
D	Only the neutral wire

3. - G1A01

On which HF and/or MF amateur bands are there portions where General class licensees cannot transmit?

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

4. - G1B02

With which of the following conditions must beacon stations comply?

Select	Answer
A	All these choices are correct
B	The frequency must be coordinated with the National Beacon Organization
C	No more than one beacon station may transmit in the same band from the same station location
D	The frequency must be posted on the internet or published in a national periodical

5. - G1C07

What must be done before using a new digital protocol on the air?

Select	Answer
A	Type-certify equipment to FCC standards
B	Obtain an experimental license from the FCC
C	Publicly document the technical characteristics of the protocol
D	Submit a rule-making proposal to the FCC describing the codes and methods of the technique

6. - G1D10

What is the minimum age that one must be to qualify as an accredited Volunteer Examiner?

Select	Answer
A	18 years
B	16 years
C	There is no age limit
D	21 years

7. - G1E02

When may a 10-meter repeater retransmit the 2-meter signal from a station that has a Technician class control operator?

Select	Answer
A	Only if the 10-meter repeater control operator holds at least a General class license
B	Under no circumstances
C	Only if the station on 10-meters is operating under a Special Temporary Authorization allowing such retransmission
D	Only during an FCC-declared general state of communications emergency

8. - G2A08

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

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

9. - G2B05

When selecting an SSB transmitting frequency, what minimum separation should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	5 Hz to 50 Hz
B	Approximately 6 kHz
C	2 kHz to 3 kHz
D	150 Hz to 500 Hz

10. - G2C11

What does the Q signal “QRV” mean?

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

11. - G2D05

Which of the following indicates that you are looking for an HF contact with any station?

Select	Answer
A	Repeat “CQ” a few times, followed by “this is,” then your call sign a few times, then pause to listen, repeat as necessary
B	Sign your call sign once, followed by the words “listening for a call” -- if no answer, change frequency and repeat
C	Say “QTC” followed by “this is” and your call sign -- if no answer, change frequency and repeat
D	Transmit an unmodulated carried for approximately 10 seconds, followed by “this is” and your call sign, and pause to listen -- repeat as necessary

12. - G2E12

Which of the following describes Winlink?

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

13. - G3A08

How can a geomagnetic storm affect HF propagation?

Select	Answer
A	Improve high-latitude HF propagation
B	Degrade high-latitude HF propagation
C	Degrade ground wave propagation
D	Improve ground wave propagation

14. - G3B06

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

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

15. - G3C10

What is near vertical incidence skywave (NVIS) propagation?

Select	Answer
A	Long path HF propagation at sunrise and sunset
B	Short distance MF or HF propagation at high elevation angles
C	Double hop propagation near the LUF
D	Propagation near the MUF

16. - G4A04

What is the effect on plate current of the correct setting of a vacuum-tube RF power amplifier’s TUNE control?

Select	Answer
A	A pronounced dip
B	No change will be observed
C	A pronounced peak
D	A slow, rhythmic oscillation

17. - G4B11

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

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

18. - G4C11

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

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

19. - G4D01

What is the purpose of a speech processor in a transceiver?

Select	Answer
A	Increase transmitter bass response for more natural-sounding SSB signals
B	Decrease high-frequency voice output to prevent out-of-band operation
C	Increase the apparent loudness of transmitted voice signals
D	Prevent distortion of voice signals

20. - G4E02

What is the purpose of a corona ball on an HF mobile antenna?

Select	Answer
A	To reduce RF voltage discharge from the tip of the antenna while transmitting
B	To narrow the operating bandwidth of the antenna
C	To increase the “Q” of the antenna
D	To reduce the chance of damage if the antenna should strike an object

21. - G5A10

Which of the following devices can be used for impedance matching at radio frequencies?

Select	Answer
A	A transformer
B	All these choices are correct
C	A length of transmission line
D	A Pi-network

22. - G5B07

What value of an AC signal produces the same power dissipation in a resistor as a DC voltage of the same value?

Select	Answer
A	The reciprocal of the RMS value
B	The RMS value
C	The peak-to-peak value
D	The peak value

23. - G5C02

What is the output voltage if an input signal is applied to the secondary winding of a 4:1 voltage step-down transformer instead of the primary winding?

Select	Answer
A	Additional resistance must be added in parallel with the secondary to prevent overload
B	Additional resistance must be added in series with the primary to prevent overload
C	The input voltage is divided by 4
D	The input voltage is multiplied by 4

24. - G6A08

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

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

25. - G6B12

Which of these connector types is commonly used for low frequency or dc signal connections to a transceiver?

Select	Answer
A	Type N
B	RCA Phono
C	PL-259
D	BNC

26. - G7A04

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

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

27. - G7B09

What determines the frequency of an LC oscillator?

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

28. - G7C07

What term specifies a filter’s attenuation inside its passband?

Select	Answer
A	Q
B	Insertion loss
C	Ultimate rejection
D	Return loss

29. - G8A09

What type of modulation is used by FT8?

Select	Answer
A	Vestigial sideband
B	8-tone frequency shift keying
C	8-bit direct sequence spread spectrum
D	Amplitude compressed AM

30. - G8B02

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

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

31. - G8C06

What action results from a failure to exchange information due to excessive transmission attempts when using an ARQ mode?

Select	Answer
A	The checksum overflows
B	The connection is dropped
C	Encoding reverts to the default character set
D	Packets will be routed incorrectly

32. - G9A07

What must be done to prevent standing waves on a feed line connected to an antenna?

Select	Answer
A	The feed line must be an even number of physical half wavelengths long
B	The feed line must be an odd number of electrical quarter wavelengths long
C	The antenna feed point must be at DC ground potential
D	The antenna feed point impedance must be matched to the characteristic impedance of the feed line

33. - G9B07

How does the feed point impedance of a horizontal 1/2 wave dipole antenna change as the antenna height is reduced to 1/10 wavelength above ground?

Select	Answer
A	It steadily decreases
B	It peaks at about 1/8 wavelength above ground
C	It is unaffected by the height above ground
D	It steadily increases

34. - G9C03

How do the lengths of a three-element Yagi reflector and director compare to that of the driven element?

Select	Answer
A	They are all the same length
B	The reflector is longer, and the director is shorter
C	The reflector is shorter, and the director is longer
D	Relative length depends on the frequency of operation

35. - G9D12

What is the common name of a dipole with a single central support?

Select	Answer
A	Lazy H
B	Sloper
C	Inverted V
D	Inverted L