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. - G0A02

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

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

2. - G0B11

Which of the following is required for lightning protection ground rods?

Select	Answer
A	Lightning grounds must be connected to all ungrounded wiring
B	Bends in ground wires must be made as close as possible to a right angle
C	They must be bonded to all buried water and gas lines
D	They must be bonded together with all other grounds

3. - G1A05

On which of the following frequencies are General class licensees prohibited from operating as control operator?

Select	Answer
A	7.125 MHz to 7.175 MHz
B	21.275 MHz to 21.300 MHz
C	28.000 MHz to 28.025 MHz
D	All these choices are correct

4. - G1B10

What is the power limit for beacon stations?

Select	Answer
A	20 watts PEP output
B	100 watts PEP output
C	10 watts PEP output
D	200 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	5.6 kHz
B	3 kHz
C	2.8 kHz
D	1.8 kHz

6. - G1D08

Which of the following criteria must be met for a non-US citizen to be an accredited Volunteer Examiner?

Select	Answer
A	The person’s home citizenship must be in ITU region 2
B	None of these choices is correct; a non-US citizen cannot be a Volunteer Examiner
C	The person must be a resident of the US for a minimum of 5 years
D	The person must hold an FCC granted amateur radio license of General class or above

7. - G1E09

Under what circumstances are messages that are sent via digital modes exempt from Part 97 third-party rules that apply to other modes of communication?

Select	Answer
A	When under automatic control
B	When messages are not encrypted
C	Under no circumstances
D	When messages are encrypted

8. - G2A04

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

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

9. - G2B06

How can you avoid harmful interference on an apparently clear frequency before calling CQ on CW or phone?

Select	Answer
A	Send the letter “V” in Morse code several times and listen for a response, or say “test” several times and listen for a response
B	Send “QSY” on CW or if using phone, announce “the frequency is in use,” then give your call sign and listen for a response
C	Send “QRL?” on CW, followed by your call sign; or, if using phone, ask if the frequency is in use, followed by your call sign
D	Listen for 2 minutes before calling CQ

10. - G2C08

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

Select	Answer
A	KN
B	BK
C	AR
D	SK

11. - G2D11

Why are signal reports typically exchanged at the beginning of an HF contact?

Select	Answer
A	To allow each station to calibrate their frequency display
B	To follow standard radiogram structure
C	To be sure the contact will count for award programs
D	To allow each station to operate according to conditions

12. - G2E03

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

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

13. - G3A07

At what point in the solar cycle does the 20-meter band usually support worldwide propagation during daylight hours?

Select	Answer
A	Only at the maximum point
B	At any point
C	At the summer solstice
D	Only at the minimum point

14. - G3B12

Which of the following is typical of the lower HF frequencies during the summer?

Select	Answer
A	Heavy distortion on signals due to photon absorption
B	High levels of atmospheric noise or static
C	World-wide propagation during daylight hours
D	Poor propagation at any time of day

15. - G3C09

What type of propagation allows signals to be heard in the transmitting station’s skip zone?

Select	Answer
A	Chordal hop
B	Scatter
C	Short-path
D	Faraday rotation

16. - G4A03

How does a noise blanker work?

Select	Answer
A	By clipping noise peaks
B	By temporarily increasing received bandwidth
C	By reducing receiver gain during a noise pulse
D	By redirecting noise pulses into a filter capacitor

17. - G4B04

What signal source is connected to the vertical input of an oscilloscope when checking the RF envelope pattern of a transmitted signal?

Select	Answer
A	The attenuated RF output of the transmitter
B	An external RF oscillator
C	The transmitter balanced mixer output
D	The local oscillator of the transmitter

18. - G4C07

Why should soldered joints not be used in lightning protection ground connections?

Select	Answer
A	A soldered joint will likely be destroyed by the heat of a lightning strike
B	All these choices are correct
C	Solder flux will prevent a low conductivity connection
D	Solder has too high a dielectric constant to provide adequate lightning protection

19. - G4D06

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

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

20. - G4E06

What is one disadvantage of using a shortened mobile antenna as opposed to a full-size antenna?

Select	Answer
A	Q of the antenna will be very low
B	Short antennas are more likely to cause distortion of transmitted signals
C	Harmonic radiation may increase
D	Operating bandwidth may be very limited

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

22. - G5B03

How many watts of electrical power are consumed if 400 VDC is supplied to an 800-ohm load?

Select	Answer
A	400 watts
B	0.5 watts
C	3200 watts
D	200 watts

23. - G5C06

What is the voltage output of a transformer with a 500-turn primary and a 1500-turn secondary when 120 VAC is applied to the primary?

Select	Answer
A	360 volts
B	40 volts
C	25.5 volts
D	120 volts

24. - G6A04

Which of the following is characteristic of an electrolytic capacitor?

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

25. - G6B11

What is an SMA connector?

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

26. - G7A02

Which of the following components are used in a power supply filter network?

Select	Answer
A	Capacitors and inductors
B	All these choices are correct
C	Diodes
D	Transformers and transducers

27. - G7B08

How is the efficiency of an RF power amplifier determined?

Select	Answer
A	Divide the RF output power by the DC input power
B	Divide the DC input power by the DC output power
C	Multiply the RF input power by the reciprocal of the RF output 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	Q
B	Return loss
C	Insertion loss
D	Ultimate rejection

29. - G8A10

What is meant by the term “flat-topping,” when referring to an amplitude-modulated phone signal?

Select	Answer
A	Signal distortion caused by excessive drive or speech levels
B	The transmitter’s carrier is properly suppressed
C	The transmitter’s automatic level control (ALC) is properly adjusted
D	Signal distortion caused by insufficient collector current

30. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

Select	Answer
A	Symbol rate and bandwidth are not related
B	Lower symbol rates require wider bandwidth
C	Higher symbol rates require wider bandwidth
D	Bandwidth is half the symbol rate

31. - G8C02

Which digital mode is used as a low-power beacon for assessing HF propagation?

Select	Answer
A	PSK31
B	MFSK16
C	SSB-SC
D	WSPR

32. - G9A09

What standing wave ratio results from connecting a 50-ohm feed line to a 200-ohm resistive load?

Select	Answer
A	1:2
B	2:1
C	1:4
D	4:1

33. - G9B09

Which of the following is an advantage of using a horizontally polarized as compared to a vertically polarized HF antenna?

Select	Answer
A	Lower feed point impedance
B	Shorter radials
C	Lower radiation resistance
D	Lower ground losses

34. - G9C11

What is a beta or hairpin match?

Select	Answer
A	A shorted transmission line stub placed at the feed point of a Yagi antenna 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 1/4 wavelength section of 75-ohm coax in series with the feed point of a Yagi to provide impedance matching

35. - G9D02

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

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