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. - 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	25 amperes
B	30 amperes
C	15 amperes
D	20 amperes

3. - G1A01

On which HF and/or MF amateur bands are there portions where General class licensees cannot transmit?

Select	Answer
A	160 meters, 60 meters, 15 meters, and 12 meters
B	60 meters, 30 meters, 17 meters, and 12 meters
C	80 meters, 20 meters, 15 meters, and 10 meters
D	80 meters, 40 meters, 20 meters, and 15 meters

4. - G1B10

What is the power limit for beacon stations?

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

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	If you are using an antenna other than a dipole, you must keep a record of the gain of your antenna
C	You must keep a record of the manufacturer of your equipment and the antenna used
D	You must keep a record of the date, time, frequency, power level, and stations worked

6. - G1D09

How long is a Certificate of Successful Completion of Examination (CSCE) valid for exam element credit?

Select	Answer
A	180 days
B	30 days
C	For as long as your current license is valid
D	365 days

7. - G1E11

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

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

8. - G2A01

Which mode is most commonly used for voice communications on frequencies of 14 MHz or higher?

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

9. - G2B09

Who may be the control operator of an amateur station transmitting in RACES to assist relief operations during a disaster?

Select	Answer
A	A person holding an FCC-issued amateur operator license or an appropriate government official
B	Only a RACES net control operator
C	Only a person holding an FCC-issued amateur operator license
D	Any control operator when normal communication systems are operational

10. - G2C03

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

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

11. - G2D08

Why do many amateurs keep a station log?

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

12. - G2E02

What is VARA?

Select	Answer
A	A digital protocol used with Winlink
B	A radio direction finding system used on VHF and UHF
C	A low signal-to-noise digital mode used for EME (moonbounce)
D	A DX spotting system using a network of software defined radios

13. - G3A05

What is the solar flux index?

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

14. - G3B07

What does LUF stand for?

Select	Answer
A	Lowest Usable Frequency for communications to any point outside a 100-mile radius
B	The Lowest Usable Frequency during a 24-hour period
C	The Lowest Usable Frequency for communications between two specific points
D	Lowest Usable Frequency during the past 60 minutes

15. - G3C01

Which ionospheric region is closest to the surface of Earth?

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

16. - G4A06

What is the purpose of an antenna tuner?

Select	Answer
A	Increase power transfer from the transmitter to the feed line
B	Reduce the power dissipation in the feedline to the antenna
C	Reduce the SWR in the feed line to the antenna
D	All these choices are correct

17. - G4B10

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

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

18. - G4C11

What technique helps to minimize RF “hot spots” in an amateur station?

Select	Answer
A	Building all equipment in a metal enclosure
B	Using surge suppressor power outlets
C	Placing low-pass filters on all feed lines
D	Bonding all equipment enclosures together

19. - G4D06

How much change in signal strength is typically represented by one S unit?

Select	Answer
A	6 dB
B	15 dB
C	18 dB
D	12 dB

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	Q of the antenna will be very low
C	Harmonic radiation may increase
D	Short antennas are more likely to cause distortion of transmitted signals

21. - G5A02

What is reactance?

Select	Answer
A	Reinforcement of the flow of alternating current caused by capacitance or inductance
B	Opposition to the flow of direct current caused by resistance
C	Opposition to the flow of alternating current caused by capacitance or inductance
D	Reinforcement of the flow of direct current caused by resistance

22. - G5B07

What value of an AC signal produces the same power dissipation in a resistor as a DC voltage of the same value?

Select	Answer
A	The RMS value
B	The reciprocal of the RMS value
C	The peak value
D	The peak-to-peak value

23. - G5C14

Which of the following components should be added to an inductor to increase the inductance?

Select	Answer
A	An inductor in series
B	A capacitor in parallel
C	An inductor in parallel
D	A capacitor in series

24. - G6A07

What are the operating points for a bipolar transistor used as a switch?

Select	Answer
A	The active region (between cutoff and saturation)
B	Saturation and cutoff
C	Enhancement and depletion modes
D	Peak and valley current points

25. - G6B12

Which of these connector types is commonly used for low frequency or dc signal connections to a transceiver?

Select	Answer
A	RCA Phono
B	Type N
C	PL-259
D	BNC

26. - G7A06

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

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

27. - G7B11

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

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

28. - G7C01

What circuit is used to select one of the sidebands from a balanced modulator?

Select	Answer
A	Filter
B	IF amplifier
C	RF amplifier
D	Carrier oscillator

29. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

Select	Answer
A	Phase modulation
B	Frequency modulation
C	Single sideband
D	Vestigial sideband

30. - G8B12

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

Select	Answer
A	Intermodulation
B	Detection
C	Rolloff
D	Heterodyning

31. - G8C06

What action results from a failure to exchange information due to excessive transmission attempts when using an ARQ mode?

Select	Answer
A	The connection is dropped
B	Packets will be routed incorrectly
C	The checksum overflows
D	Encoding reverts to the default character set

32. - G9A01

Which of the following factors determine the characteristic impedance of a parallel conductor feed line?

Select	Answer
A	The radius of the conductors and the frequency of the signal
B	The frequency of the signal and the length of the line
C	The distance between the centers of the conductors and the radius of the conductors
D	The distance between the centers of the conductors and the length of the line

33. - G9B03

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

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

34. - G9C11

What is a beta or hairpin match?

Select	Answer
A	A 1/4 wavelength section of 75-ohm coax in series with the feed point of a Yagi to provide impedance matching
B	A series capacitor selected to cancel the inductive reactance of a folded dipole antenna
C	A section of 300-ohm twin-lead transmission line used to match a folded dipole antenna
D	A shorted transmission line stub placed at the feed point of a Yagi antenna to provide impedance matching

35. - G9D08

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

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