US Amateur Radio - General (Element 3, 2023-2027) Practice Test

Anonymous User

US Amateur Radio - General (Element 3, 2023-2027) Practice Test

Logging in (or registering) will help the system to select questions that you need to focus on.

1. - G0A02

Which of the following is used to determine RF exposure from a transmitted signal?

Select	Answer
A	Its duty cycle
B	All these choices are correct
C	Its power density
D	Its frequency

2. - G0B10

Which of the following is a danger from lead-tin solder?

Select	Answer
A	Lead can contaminate food if hands are not washed carefully after handling the solder
B	RF energy can convert the lead into a poisonous gas
C	High voltages can cause lead-tin solder to disintegrate suddenly
D	Tin in the solder can “cold flow,” causing shorts in the circuit

3. - G1A02

On which of the following bands is phone operation prohibited?

Select	Answer
A	160 meters
B	17 meters
C	30 meters
D	12 meters

4. - G1B10

What is the power limit for beacon stations?

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

5. - G1C11

What measurement is specified by FCC rules that regulate maximum power?

Select	Answer
A	RMS input to the antenna
B	PEP output from the transmitter
C	RMS output from the transmitter
D	PEP input to the antenna

6. - G1D02

What license examinations may you administer as an accredited Volunteer Examiner holding a General class operator license?

Select	Answer
A	Amateur Extra, General, and Technician
B	None, only Amateur Extra class licensees may be accredited
C	Technician only
D	General and Technician

7. - G1E11

On what bands may automatically controlled stations transmitting RTTY or data emissions communicate with other automatically controlled digital stations?

Select	Answer
A	Anywhere in the non-phone segments of the 10-meter or shorter wavelength bands
B	Only in the non-phone Extra Class segments of the bands
C	On any band segment where digital operation is permitted
D	Anywhere in the 6-meter or shorter wavelength bands, and in limited segments of some of the HF bands

8. - G2A04

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

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

9. - G2B11

How often may RACES training drills and tests be routinely conducted without special authorization?

Select	Answer
A	No more than 1 hour per month
B	No more than 2 hours per month
C	No more than 2 hours per week
D	No more than 1 hour per week

10. - G2C03

What does it mean when a CW operator sends “KN” at the end of a transmission?

Select	Answer
A	Closing station now
B	Operating full break-in
C	Listening only for a specific station or stations
D	No US stations should call

11. - G2D01

What is the Volunteer Monitor Program?

Select	Answer
A	Amateur volunteers who conduct frequency coordination for amateur VHF repeaters
B	Amateur volunteers who are formally enlisted to monitor the airwaves for rules violations
C	Amateur volunteers who conduct amateur licensing examinations
D	Amateur volunteers who use their station equipment to help civil defense organizations in times of emergency

12. - G2E08

In what segment of the 20-meter band are most digital mode operations commonly found?

Select	Answer
A	Between 14.070 MHz and 14.100 MHz
B	At the bottom of the slow-scan TV segment, near 14.230 MHz
C	At the top of the SSB phone segment, near 14.325 MHz
D	In the middle of the CW segment, near 14.100 MHz

13. - G3A14

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

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

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 Maximum Usable Frequency for communications between two points
D	The Minimum Usable Frequency during a 24-hour period

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

16. - G4A13

What is the purpose of using a receive attenuator?

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

17. - G4B01

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

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

18. - G4C10

What could be a symptom caused by a ground loop in your station’s audio connections?

Select	Answer
A	An item of station equipment starts to draw excessive amounts of current
B	The SWR reading for one or more antennas is suddenly very high
C	You receive reports of harmonic interference from your station
D	You receive reports of “hum” on your station’s transmitted signal

19. - G4D11

How close to the upper edge of a band’s phone segment should your displayed carrier frequency be when using 3 kHz wide USB?

Select	Answer
A	At least 1 kHz above the edge of the segment
B	At least 3 kHz above the edge of the band
C	At least 3 kHz below the edge of the band
D	At least 1 kHz below the edge of the segment

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. - G5A08

What is impedance?

Select	Answer
A	The ratio of current to voltage
B	The ratio of voltage to current
C	The product of current and voltage
D	The product of current and reactance

22. - G5B06

What is the PEP produced by 200 volts peak-to-peak across a 50-ohm dummy load?

Select	Answer
A	100 watts
B	353.5 watts
C	1.4 watts
D	400 watts

23. - G5C09

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

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

24. - G6A05

What is the approximate forward threshold voltage of a silicon junction diode?

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

25. - G6B11

What is an SMA connector?

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

26. - G7A08

Which of the following is characteristic of a switchmode power supply as compared to a linear power supply?

Select	Answer
A	Inherently more stable
B	Fewer circuit components are required
C	Faster switching time makes higher output voltage possible
D	High-frequency operation allows the use of smaller components

27. - G7B08

How is the efficiency of an RF power amplifier determined?

Select	Answer
A	Divide the DC input power by the DC output power
B	Multiply the RF input power by the reciprocal of the RF output power
C	Divide the RF output power by the DC input power
D	Add the RF input power to the DC output power

28. - G7C07

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

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

29. - G8A06

Which of the following is characteristic of QPSK31?

Select	Answer
A	Its encoding provides error correction
B	All these choices are correct
C	Its bandwidth is approximately the same as BPSK31
D	It is sideband sensitive

30. - G8B12

What process combines two signals in a non-linear circuit to produce unwanted spurious outputs?

Select	Answer
A	Rolloff
B	Heterodyning
C	Intermodulation
D	Detection

31. - G8C01

On what band do amateurs share channels with the unlicensed Wi-Fi service?

Select	Answer
A	902 MHz
B	432 MHz
C	10.7 GHz
D	2.4 GHz

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

33. - G9B06

Where should the radial wires of a ground-mounted vertical antenna system be placed?

Select	Answer
A	On the surface or buried a few inches below the ground
B	As high as possible above the ground
C	Parallel to the antenna element
D	At the center of the antenna

34. - G9C09

In free space, how does the gain of two three-element, horizontally polarized Yagi antennas spaced vertically 1/2 wavelength apart typically compare to the gain of a single three-element Yagi?

Select	Answer
A	Approximately 3 dB higher
B	Approximately 6 dB higher
C	Approximately 1.5 dB higher
D	Approximately 9 dB higher

35. - G9D07

Which of the following describes a log-periodic antenna?

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