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. - G0A11

What precaution should be taken if you install an indoor transmitting antenna?

Select	Answer
A	Position the antenna along the edge of a wall to reduce parasitic radiation
B	Locate the antenna close to your operating position to minimize feed-line radiation
C	Make sure that MPE limits are not exceeded in occupied areas
D	Make sure the antenna is properly shielded

2. - G0B03

Which size of fuse or circuit breaker would be appropriate to use with a circuit that uses AWG number 14 wiring?

Select	Answer
A	20 amperes
B	25 amperes
C	30 amperes
D	15 amperes

3. - G1A03

On which of the following bands is image transmission prohibited?

Select	Answer
A	160 meters
B	30 meters
C	20 meters
D	12 meters

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 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
B	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
C	Only when the foreign country has a formal third-party agreement filed with the FCC
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. - G1C06

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

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

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

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	Anywhere in the band
C	Channels 1 through 4
D	Channels 42 through 45

8. - G2A12

What control is typically adjusted for proper ALC setting on a single sideband transceiver?

Select	Answer
A	Transmit audio or microphone gain
B	Attenuator level
C	Antenna inductance or capacitance
D	RF clipping level

9. - G2B03

What is good amateur practice if propagation changes during a contact creating interference from other stations using the frequency?

Select	Answer
A	Switch to the opposite sideband
B	Advise the interfering stations that you are on the frequency and that you have priority
C	Decrease power and continue to transmit
D	Attempt to resolve the interference problem with the other stations in a mutually acceptable manner

10. - G2C10

What does the Q signal “QRN” mean?

Select	Answer
A	Stop sending
B	Zero beat my signal
C	Send more slowly
D	I am troubled by static

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

12. - G2E01

Which mode is normally used when sending RTTY signals via AFSK with an SSB transmitter?

Select	Answer
A	LSB
B	CW
C	USB
D	DSB

13. - G3A05

What is the solar flux index?

Select	Answer
A	A count of sunspots that is adjusted for solar emissions
B	A measure of solar radiation with a wavelength of 10.7 centimeters
C	Another name for the American sunspot number
D	A measure of the highest frequency that is useful for ionospheric propagation between two points on Earth

14. - G3B05

How does the ionosphere affect radio waves with frequencies below the MUF and above the LUF?

Select	Answer
A	They are refracted back to Earth
B	They are refracted and trapped in the ionosphere to circle Earth
C	They pass through the ionosphere
D	They are amplified by interaction with the ionosphere

15. - G3C04

What does the term “critical angle” mean, as applied to radio wave propagation?

Select	Answer
A	The lowest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions
B	The short path azimuth of a distant station
C	The long path azimuth of a distant station
D	The highest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions

16. - G4A13

What is the purpose of using a receive attenuator?

Select	Answer
A	To reduce excessive audio level on strong signals
B	To prevent receiver overload from strong incoming signals
C	To reduce power consumption when operating from batteries
D	To reduce the transmitter power when driving a linear amplifier

17. - G4B10

Which of the following can be determined with a directional wattmeter?

Select	Answer
A	RF interference
B	Radio wave propagation
C	Antenna front-to-back ratio
D	Standing wave ratio

18. - G4C08

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

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

19. - G4D03

What is the effect of an incorrectly adjusted speech processor?

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

20. - G4E09

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

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

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 decreases
C	As the amplitude of the applied AC increases, the reactance decreases
D	As the frequency of the applied AC increases, the reactance increases

22. - G5B09

What is the RMS voltage of a sine wave with a value of 17 volts peak?

Select	Answer
A	34 volts
B	12 volts
C	24 volts
D	8.5 volts

23. - G5C10

What is the inductance of three 10-millihenry inductors connected in parallel?

Select	Answer
A	30 millihenries
B	3.3 henries
C	3.3 millihenries
D	0.30 henries

24. - G6A01

What is the minimum allowable discharge voltage for maximum life of a standard 12-volt lead-acid battery?

Select	Answer
A	6 volts
B	10.5 volts
C	12 volts
D	8.5 volts

25. - G6B03

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

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

26. - G7A03

Which type of rectifier circuit uses two diodes and a center-tapped transformer?

Select	Answer
A	Half-wave
B	Synchronous
C	Full-wave bridge
D	Full-wave

27. - G7B03

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

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

28. - G7C06

Which of the following is an advantage of a digital signal processing (DSP) filter compared to an analog filter?

Select	Answer
A	Fewer digital components are required
B	Mixing products are greatly reduced
C	The DSP filter is much more effective at VHF frequencies
D	A wide range of filter bandwidths and shapes can be created

29. - G8A01

How is direct binary FSK modulation generated?

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

30. - G8B05

Which intermodulation products are closest to the original signal frequencies?

Select	Answer
A	Odd-order
B	Second harmonics
C	Even-order
D	Intercept point

31. - G8C07

Which of the following narrow-band digital modes can receive signals with very low signal-to-noise ratios?

Select	Answer
A	AMTOR
B	FT8
C	MFSK32
D	MSK144

32. - G9A06

In what units is RF feed line loss usually expressed?

Select	Answer
A	Ohms per 100 feet
B	Ohms per 1,000 feet
C	Decibels per 1,000 feet
D	Decibels per 100 feet

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

34. - G9C04

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

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

35. - G9D02

What is the feed point impedance of an end-fed half-wave antenna?

Select	Answer
A	Very low
B	Very high
C	Approximately 50 ohms
D	Approximately 300 ohms