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

2. - G0B06

Which of the following is covered by the National Electrical Code?

Select	Answer
A	Acceptable bandwidth limits
B	Acceptable modulation limits
C	RF exposure limits of the human body
D	Electrical safety of the station

3. - G1A03

On which of the following bands is image transmission prohibited?

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

4. - G1B06

Under what conditions are state and local governments permitted to regulate amateur radio antenna structures?

Select	Answer
A	Only when such structures exceed 50 feet in height and are clearly visible 1,000 feet from the structure
B	Under no circumstances, FCC rules take priority
C	Amateur Service communications must be reasonably accommodated, and regulations must constitute the minimum practical to accommodate a legitimate purpose of the state or local entity
D	At any time and to any extent necessary to accomplish a legitimate purpose of the state or local entity, provided that proper filings are made with the FCC

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

7. - G1E08

What is the maximum PEP output allowed for spread spectrum transmissions?

Select	Answer
A	100 watts
B	100 milliwatts
C	10 watts
D	1500 watts

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	Antenna inductance or capacitance
C	RF clipping level
D	Attenuator 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	Attempt to resolve the interference problem with the other stations in a mutually acceptable manner
C	Advise the interfering stations that you are on the frequency and that you have priority
D	Decrease power and continue to transmit

10. - G2C08

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

Select	Answer
A	AR
B	KN
C	BK
D	SK

11. - G2D08

Why do many amateurs keep a station log?

Select	Answer
A	The FCC requires a log of all international contacts
B	To help with a reply if the FCC requests information about your station
C	The FCC requires a log of all international third-party traffic
D	The log provides evidence of operation needed to renew a license without retest

12. - G2E01

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

Select	Answer
A	USB
B	CW
C	DSB
D	LSB

13. - G3A14

How is long distance radio communication usually affected by the charged particles that reach Earth from solar coronal holes?

Select	Answer
A	HF communication is improved
B	VHF/UHF ducting is disturbed
C	HF communication is disturbed
D	VHF/UHF ducting is improved

14. - G3B04

Which of the following is a way to determine current propagation on a desired band from your station?

Select	Answer
A	Use a network of automated receiving stations on the internet to see where your transmissions are being received
B	All these choices are correct
C	Send a series of dots and listen for echoes
D	Check the A-index

15. - G3C01

Which ionospheric region is closest to the surface of Earth?

Select	Answer
A	The E region
B	The F2 region
C	The D region
D	The F1 region

16. - G4A02

What is the benefit of using the opposite or “reverse” sideband when receiving CW?

Select	Answer
A	More stations can be accommodated within a given signal passband
B	It may be possible to reduce or eliminate interference from other signals
C	Accidental out-of-band operation can be prevented
D	Interference from impulse noise will be eliminated

17. - G4B10

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

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

18. - G4C02

Which of the following could be a cause of interference covering a wide range of frequencies?

Select	Answer
A	Lack of rectification of the transmitter’s signal in power conductors
B	Using a balun to feed an unbalanced antenna
C	Arcing at a poor electrical connection
D	Not using a balun or line isolator to feed balanced antennas

19. - G4D03

What is the effect of an incorrectly adjusted speech processor?

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

20. - G4E01

What is the purpose of a capacitance hat on a mobile antenna?

Select	Answer
A	To increase the power handling capacity of a whip antenna
B	To lower the radiation angle
C	To reduce radiation resistance
D	To electrically lengthen a physically short antenna

21. - G5A07

What is the term for the inverse of impedance?

Select	Answer
A	Susceptance
B	Admittance
C	Reluctance
D	Conductance

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	2.4 watts
C	6 watts
D	24 watts

23. - G5C09

What is the capacitance of three 100-microfarad capacitors connected in series?

Select	Answer
A	33.3 microfarads
B	300 microfarads
C	0.33 microfarads
D	3.0 microfarads

24. - G6A04

Which of the following is characteristic of an electrolytic capacitor?

Select	Answer
A	High capacitance for a given volume
B	Much less leakage than any other type
C	Tight tolerance
D	Inexpensive RF capacitor

25. - G6B11

What is an SMA connector?

Select	Answer
A	A connector designed for serial multiple access signals
B	A type of push-on connector intended for high-voltage applications
C	A small threaded connector suitable for signals up to several GHz
D	A type-S to type-M adaptor

26. - G7A05

What portion of the AC cycle is converted to DC by a half-wave rectifier?

Select	Answer
A	360 degrees
B	90 degrees
C	270 degrees
D	180 degrees

27. - G7B04

In a Class A amplifier, what percentage of the time does the amplifying device conduct?

Select	Answer
A	Less than 50%
B	More than 50% but less than 100%
C	50%
D	100%

28. - G7C13

What term specifies a filter’s maximum ability to reject signals outside its passband?

Select	Answer
A	Insertion loss
B	Rolloff
C	Notch depth
D	Ultimate rejection

29. - G8A02

What is the name of the process that changes the phase angle of an RF signal to convey information?

Select	Answer
A	Phase modulation
B	Phase transformation
C	Phase inversion
D	Phase convolution

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	Image response
C	Mixer interference
D	Quadrature response

31. - G8C12

Which type of code is used for sending characters in a PSK31 signal?

Select	Answer
A	Volumetric
B	Binary
C	Viterbi
D	Varicode

32. - G9A11

What is the effect of transmission line loss on SWR measured at the input to the line?

Select	Answer
A	Higher loss increases SWR measured at the input to the line
B	Transmission line loss does not affect the SWR measurement
C	Higher loss increases the accuracy of SWR measured at the input to the line
D	Higher loss reduces SWR measured at the input to the line

33. - G9B03

Which of the following best describes the radiation pattern of a quarter-wave ground-plane vertical antenna?

Select	Answer
A	Bi-directional in azimuth
B	Omnidirectional in azimuth
C	Hemispherical
D	Isotropic

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

35. - G9D07

Which of the following describes a log-periodic antenna?

Select	Answer
A	SWR varies periodically as a function of boom length
B	Element length and spacing vary logarithmically along the boom
C	Gain varies logarithmically as a function of frequency
D	Impedance varies periodically as a function of frequency