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

2. - G0B13

Where should lightning arrestors be located?

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

3. - G1A09

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

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

4. - G1B10

What is the power limit for beacon stations?

Select	Answer
A	200 watts PEP output
B	100 watts PEP output
C	10 watts PEP output
D	20 watts PEP output

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	3 kHz
B	2.8 kHz
C	5.6 kHz
D	1.8 kHz

6. - G1D12

When operating a station in South America by remote control over the internet from the US, what regulations apply?

Select	Answer
A	Those of the remote station’s country and the FCC’s third-party regulations
B	Only those of the remote station’s country
C	Only those of the FCC
D	Those of both the remote station’s country and the FCC

7. - G1E01

Which of the following would disqualify a third party from participating in sending a message via an amateur station?

Select	Answer
A	The third party is not a US citizen
B	The third party’s amateur license has been revoked and not reinstated
C	All these choices are correct
D	The third party is speaking in a language other than English

8. - G2A04

Which mode is most commonly used for voice communications on the 17- and 12-meter bands?

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

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

10. - G2C08

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

Select	Answer
A	BK
B	KN
C	SK
D	AR

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

12. - G2E03

What symptoms may result from other signals interfering with a PACTOR or VARA transmission?

Select	Answer
A	All these choices are correct
B	Failure to establish a connection between stations
C	Frequent retries or timeouts
D	Long pauses in message transmission

13. - G3A02

What effect does a sudden ionospheric disturbance have on the daytime ionospheric propagation?

Select	Answer
A	It enhances propagation on all HF frequencies
B	None, because only areas on the night side of the Earth are affected
C	It disrupts communications via satellite more than direct communications
D	It disrupts signals on lower frequencies more than those on higher frequencies

14. - G3B01

What is a characteristic of skywave signals arriving at your location by both short-path and long-path propagation?

Select	Answer
A	A slightly delayed echo might be heard
B	Signal strength increased by 3 dB
C	The signal might be cancelled causing severe attenuation
D	Periodic fading approximately every 10 seconds

15. - G3C05

Why is long-distance communication on the 40-, 60-, 80-, and 160-meter bands more difficult during the day?

Select	Answer
A	The F region absorbs signals at these frequencies during daylight hours
B	The D region absorbs signals at these frequencies during daylight hours
C	The F region is unstable during daylight hours
D	The E region is unstable during daylight hours

16. - G4A01

What is the purpose of the notch filter found on many HF transceivers?

Select	Answer
A	To remove interfering splatter generated by signals on adjacent frequencies
B	To restrict the transmitter voice bandwidth
C	To eliminate receiver interference from impulse noise sources
D	To reduce interference from carriers in the receiver passband

17. - G4B01

What item of test equipment contains horizontal and vertical channel amplifiers?

Select	Answer
A	An oscilloscope
B	An ammeter
C	A signal generator
D	An ohmmeter

18. - G4C12

Why must all metal enclosures of station equipment be grounded?

Select	Answer
A	It prevents a blown fuse in the event of an internal short circuit
B	It ensures that hazardous voltages cannot appear on the chassis
C	It prevents signal overload
D	It ensures that the neutral wire is grounded

19. - G4D07

How much must the power output of a transmitter be raised to change the S meter reading on a distant receiver from S8 to S9?

Select	Answer
A	Approximately 8 times
B	Approximately 4 times
C	Approximately 1.5 times
D	Approximately 2 times

20. - G4E09

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

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

21. - G5A05

How does an inductor react to AC?

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

22. - G5B04

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

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

23. - G5C12

What is the capacitance of a 20-microfarad capacitor connected in series with a 50-microfarad capacitor?

Select	Answer
A	70 microfarads
B	0.07 microfarads
C	14.3 microfarads
D	1,000 microfarads

24. - G6A08

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

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

25. - G6B01

What determines the performance of a ferrite core at different frequencies?

Select	Answer
A	Its thickness
B	Its conductivity
C	The ratio of outer diameter to inner diameter
D	The composition, or “mix,” of materials used

26. - G7A10

Which symbol in figure G7-1 represents a Zener diode?

Select	Answer
A	Symbol 5
B	Symbol 11
C	Symbol 1
D	Symbol 4

27. - G7B11

For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?

Select	Answer
A	SSB
B	All these choices are correct
C	AM
D	FM

28. - G7C03

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

Select	Answer
A	To reduce power supply ripple
B	To minimize transmitter power output
C	To present the desired impedance to the transmitter and feed line
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	Amplitude modulation
B	Multiplex modulation
C	Pulse modulation
D	Phase modulation

30. - G8B08

Why is it important to know the duty cycle of the mode you are using when transmitting?

Select	Answer
A	To prevent overmodulation
B	To allow time for the other station to break in during a transmission
C	To aid in tuning your transmitter
D	Some modes have high duty cycles that could exceed the transmitter’s average power rating

31. - G8C11

How are the two separate frequencies of a Frequency Shift Keyed (FSK) signal identified?

Select	Answer
A	On and off
B	Dot and dash
C	High and low
D	Mark and space

32. - G9A05

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

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

33. - G9B10

What is the approximate length for a 1/2 wave dipole antenna cut for 14.250 MHz?

Select	Answer
A	16 feet
B	33 feet
C	24 feet
D	8 feet

34. - G9C10

Which of the following can be adjusted to optimize forward gain, front-to-back ratio, or SWR bandwidth of a Yagi antenna?

Select	Answer
A	The spacing of each element along the boom
B	The number of elements on the boom
C	All these choices are correct
D	The physical length of the boom

35. - G9D08

How does a “screwdriver” mobile antenna adjust its feed point impedance?

Select	Answer
A	By extending and retracting the whip
B	By varying the base loading inductance
C	By deploying a capacitance hat
D	By varying its body capacitance

Figure G7-1