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. - G0A09

What type of instrument can be used to accurately measure an RF field strength?

Select	Answer
A	An oscilloscope with a high-stability crystal marker generator
B	A calibrated field strength meter with a calibrated antenna
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	20 amperes
B	15 amperes
C	30 amperes
D	25 amperes

3. - G1A07

On which amateur frequencies in the 10-meter band may stations with a General class control operator transmit CW emissions?

Select	Answer
A	28.025 MHz to 28.300 MHz only
B	28.000 MHz to 28.300 MHz only
C	28.000 MHz to 28.025 MHz only
D	The entire band

4. - G1B06

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

Select	Answer
A	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
B	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
C	Under no circumstances, FCC rules take priority
D	Only when such structures exceed 50 feet in height and are clearly visible 1,000 feet from the structure

5. - G1C07

What must be done before using a new digital protocol on the air?

Select	Answer
A	Obtain an experimental license from the FCC
B	Publicly document the technical characteristics of the protocol
C	Submit a rule-making proposal to the FCC describing the codes and methods of the technique
D	Type-certify equipment to FCC standards

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. - G1E12

When may third-party messages be transmitted via remote control?

Select	Answer
A	Only when the message is intended for third parties in areas where licensing is controlled by the FCC
B	Under no circumstances except for emergencies
C	Only when the message is intended for licensed radio amateurs
D	Under any circumstances in which third party messages are permitted by FCC rules

8. - G2A03

Which mode is most commonly used for SSB voice communications in the VHF and UHF bands?

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

9. - G2B07

Which of the following complies with commonly accepted amateur practice when choosing a frequency on which to initiate a call?

Select	Answer
A	All these choices are correct
B	Listen on the frequency for at least two minutes to be sure it is clear
C	Identify your station by transmitting your call sign at least 3 times
D	Follow the voluntary band plan

10. - G2C02

What should you do if a CW station sends “QRS?”

Select	Answer
A	Repeat everything twice
B	Change frequency
C	Send slower
D	Increase your power

11. - G2D11

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

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

12. - G2E10

Which of the following is a way to establish contact with a digital messaging system gateway station?

Select	Answer
A	Respond when the station broadcasts its SSID
B	Transmit a connect message on the station’s published frequency
C	Send QRL in Morse code
D	Send an email to the system control operator

13. - G3A01

How does a higher sunspot number affect HF propagation?

Select	Answer
A	A zero sunspot number indicates undisturbed conditions
B	Higher sunspot numbers generally indicate a greater probability of good propagation at higher frequencies
C	Lower sunspot numbers generally indicate greater probability of sporadic E propagation
D	A zero sunspot number indicates that radio propagation is not possible on any band

14. - G3B03

Which frequency will have the least attenuation for long-distance skip propagation?

Select	Answer
A	Just above the LUF
B	Just below the MUF
C	Just above the critical frequency
D	Just below the critical frequency

15. - G3C08

Why are HF scatter signals in the skip zone usually weak?

Select	Answer
A	Propagation is via ground waves, which absorb most of the signal energy
B	Signals are scattered from the magnetosphere, which is not a good reflector
C	Propagation is via ducts in the F region, which absorb most of the energy
D	Only a small part of the signal energy is scattered into the skip zone

16. - G4A03

How does a noise blanker work?

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

17. - G4B05

Why do voltmeters have high input impedance?

Select	Answer
A	It decreases the loading on circuits being measured
B	It improves the frequency response
C	It allows for higher voltages to be safely measured
D	It improves the resolution of the readings

18. - G4C12

Why must all metal enclosures of station equipment be grounded?

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

19. - G4D05

How does a signal that reads 20 dB over S9 compare to one that reads S9 on a receiver, assuming a properly calibrated S meter?

Select	Answer
A	It is 10 times less powerful
B	It is 20 times less powerful
C	It is 100 times more powerful
D	It is 20 times more powerful

20. - G4E10

Why should a series diode be connected between a solar panel and a storage battery that is being charged by the panel?

Select	Answer
A	To prevent discharge of the battery through the panel during times of low or no illumination
B	To prevent overload by regulating the charging voltage
C	To limit the current flowing from the panel to a safe value
D	To prevent damage to the battery due to excessive voltage at high illumination levels

21. - G5A04

Which of the following is opposition to the flow of alternating current in a capacitor?

Select	Answer
A	Reluctance
B	Reactance
C	Conductance
D	Admittance

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	3200 watts
C	0.5 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	120 volts
D	25.5 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	Inexpensive RF capacitor
D	Tight tolerance

25. - G6B08

How is an LED biased when emitting light?

Select	Answer
A	At the Zener voltage
B	Forward biased
C	In the tunnel-effect region
D	Reverse biased

26. - G7A13

Which symbol in Figure G7-1 represents a tapped inductor?

Select	Answer
A	Symbol 11
B	Symbol 6
C	Symbol 7
D	Symbol 1

27. - G7B01

What is the purpose of neutralizing an amplifier?

Select	Answer
A	To keep the carrier on frequency
B	To cut off the final amplifier during standby periods
C	To limit the modulation index
D	To eliminate self-oscillations

28. - G7C07

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

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

29. - G8A13

What is a link budget?

Select	Answer
A	The sum of antenna gains minus system losses
B	The difference between transmit power and receiver sensitivity
C	The sum of transmit power and antenna gains minus system losses as seen at the receiver
D	The financial costs associated with operating a radio link

30. - G8B03

What is another term for the mixing of two RF signals?

Select	Answer
A	Phase inversion
B	Frequency inversion
C	Synthesizing
D	Heterodyning

31. - G8C01

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

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

32. - G9A02

What is the relationship between high standing wave ratio (SWR) and transmission line loss?

Select	Answer
A	High SWR makes it difficult to measure transmission line loss
B	High SWR increases loss in a lossy transmission line
C	High SWR reduces the relative effect of transmission line loss
D	There is no relationship between transmission line loss and SWR

33. - G9B03

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

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

34. - G9C04

How does antenna gain in dBi compare to gain stated in dBd for the same antenna?

Select	Answer
A	Gain in dBi is 2.15 dB lower
B	Gain in dBi is 2.15 dB higher
C	Gain in dBd is 1.25 dBd lower
D	Gain in dBd is 1.25 dBd higher

35. - G9D11

Which of the following is a disadvantage of multiband antennas?

Select	Answer
A	They have poor harmonic rejection
B	They must be fed with open wire line
C	They present low impedance on all design frequencies
D	They must be used with an antenna tuner

Figure G7-1