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

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 16
B	AWG number 20
C	AWG number 12
D	AWG number 8

3. - G1A09

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

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

4. - G1B03

Which of the following is a purpose of a beacon station as identified in the FCC rules?

Select	Answer
A	Transmission of bulletins of general interest to amateur radio licensees
B	Automatic identification of repeaters
C	All these choices are correct
D	Observation of propagation and reception

5. - G1C03

What is the maximum bandwidth permitted by FCC rules for amateur radio stations transmitting on USB frequencies in the 60-meter band?

Select	Answer
A	1.8 kHz
B	5.6 kHz
C	2.8 kHz
D	3 kHz

6. - G1D05

When operating a US station by remote control from outside the country, what license is required of the control operator?

Select	Answer
A	A license from the foreign country and a special remote station permit from the FCC
B	Only an appropriate US operator/primary license and a special remote station permit from the FCC
C	A US operator/primary station license
D	Only a license from the foreign country, as long as the call sign includes identification of portable operation in the US

7. - G1E07

In what part of the 2.4 GHz band may an amateur station communicate with non-licensed Wi-Fi stations?

Select	Answer
A	No part
B	Channels 1 through 4
C	Channels 42 through 45
D	Anywhere in the band

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

9. - G2B04

When selecting a CW transmitting frequency, what minimum separation from other stations should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	5 Hz to 50 Hz
B	3 kHz to 6 kHz
C	150 Hz to 500 Hz
D	1 kHz to 3 kHz

10. - G2C07

When sending CW, what does a “C” mean when added to the RST report?

Select	Answer
A	100 percent copy
B	Report was read from an S meter rather than estimated
C	Key clicks
D	Chirpy or unstable signal

11. - G2D10

What is QRP operation?

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

12. - G2E05

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

Select	Answer
A	DSB
B	SSB
C	LSB
D	USB

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. - G3B08

What does MUF stand for?

Select	Answer
A	The Minimum Usable Frequency for communications between two points
B	The Maximum Usable Frequency during a 24-hour period
C	The Minimum Usable Frequency during a 24-hour period
D	The Maximum Usable Frequency for communications between two points

15. - G3C09

What type of propagation allows signals to be heard in the transmitting station’s skip zone?

Select	Answer
A	Scatter
B	Short-path
C	Chordal hop
D	Faraday rotation

16. - G4A05

Why is automatic level control (ALC) used with an RF power amplifier?

Select	Answer
A	To increase overall efficiency
B	To reduce harmonic radiation
C	To prevent excessive drive
D	To balance the transmitter audio frequency response

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	Antenna and feed line
C	Transmitter
D	Receiver

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	Add an additional insulating jacket to the cable
C	Connect the center conductor to the shield of all cables to short circuit the RFI signal
D	Place a ferrite choke on the cable

19. - G4D03

What is the effect of an incorrectly adjusted speech processor?

Select	Answer
A	All these choices are correct
B	Excess intermodulation products
C	Excessive background noise
D	Distorted speech

20. - G4E06

What is one disadvantage of using a shortened mobile antenna as opposed to a full-size antenna?

Select	Answer
A	Operating bandwidth may be very limited
B	Short antennas are more likely to cause distortion of transmitted signals
C	Q of the antenna will be very low
D	Harmonic radiation may increase

21. - G5A06

How does a capacitor react to AC?

Select	Answer
A	As the amplitude of the applied AC increases, the reactance increases
B	As the frequency of the applied AC increases, the reactance increases
C	As the amplitude of the applied AC increases, the reactance decreases
D	As the frequency of the applied AC increases, the reactance decreases

22. - G5B02

How does the total current relate to the individual currents in a circuit of parallel resistors?

Select	Answer
A	It is the sum of the reciprocal of each individual voltage drop
B	It equals the sum of the currents through each branch
C	It decreases as more parallel branches are added to the circuit
D	It equals the average of the branch currents

23. - G5C06

What is the voltage output of a transformer with a 500-turn primary and a 1500-turn secondary when 120 VAC is applied to the primary?

Select	Answer
A	25.5 volts
B	40 volts
C	360 volts
D	120 volts

24. - G6A03

What is the approximate forward threshold voltage of a germanium diode?

Select	Answer
A	0.3 volts
B	1.0 volts
C	0.1 volt
D	0.7 volts

25. - G6B03

Which of the following is an advantage of CMOS integrated circuits compared to TTL integrated circuits?

Select	Answer
A	Low power consumption
B	High power handling capability
C	Better suited for RF amplification
D	Better suited for power supply regulation

26. - G7A11

Which symbol in figure G7-1 represents an NPN junction transistor?

Select	Answer
A	Symbol 7
B	Symbol 2
C	Symbol 11
D	Symbol 1

27. - G7B03

Which of the following describes the function of a two-input AND gate?

Select	Answer
A	Output is low only when both inputs are high
B	Output is low when either or both inputs are high
C	Output is high only when both inputs are high
D	Output is high when either or both inputs are low

28. - G7C03

What is one reason to use an impedance matching transformer at a transmitter output?

Select	Answer
A	To present the desired impedance to the transmitter and feed line
B	To minimize transmitter power output
C	To reduce power supply ripple
D	To minimize radiation resistance

29. - G8A04

What emission is produced by a reactance modulator connected to a transmitter RF amplifier stage?

Select	Answer
A	Phase modulation
B	Multiplex modulation
C	Amplitude modulation
D	Pulse modulation

30. - G8B11

What combination of a mixer’s Local Oscillator (LO) and RF input frequencies is found in the output?

Select	Answer
A	The arithmetic product
B	The ratio
C	The sum and difference
D	The average

31. - G8C16

Which of the following provide digital voice modes?

Select	Answer
A	Winlink, PACTOR II, and PACTOR III
B	FT8, FT4, and FST4
C	DMR, D-STAR, and SystemFusion
D	WSPR, MFSK16, and EasyPAL

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 radius of the conductors
B	The frequency of the signal and the length of the line
C	The radius of the conductors and the frequency of the signal
D	The distance between the centers of the conductors and the length of the 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 peaks at about 1/8 wavelength above ground
B	It is unaffected by the height above ground
C	It steadily decreases
D	It steadily increases

34. - G9C05

What is the primary effect of increasing boom length and adding directors to a Yagi antenna?

Select	Answer
A	Gain increases
B	Resonant frequency is lower
C	Beamwidth increases
D	Front-to-back ratio decreases

35. - G9D04

What is the primary function of antenna traps?

Select	Answer
A	To prevent out-of-band operation
B	To provide balanced feed point impedance
C	To enable multiband operation
D	To notch spurious frequencies

Figure G7-1