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. - G0A01

What is one way that RF energy can affect human body tissue?

Select	Answer
A	It causes the blood count to reach a dangerously low level
B	It heats body tissue
C	It causes radiation poisoning
D	It cools body tissue

2. - G0B08

What should be done before climbing a tower that supports electrically powered devices?

Select	Answer
A	Notify the electric company that a person will be working on the tower
B	Unground the base of the tower
C	Make sure all circuits that supply power to the tower are locked out and tagged
D	All these choices are correct

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	28.000 MHz to 28.025 MHz
C	21.275 MHz to 21.300 MHz
D	All these choices are correct

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	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	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	Under no circumstances, FCC rules take priority

5. - G1C01

What is the maximum transmitter power an amateur station may use on 10.140 MHz?

Select	Answer
A	2000 watts PEP output
B	1000 watts PEP output
C	200 watts PEP output
D	1500 watts PEP output

6. - G1D10

What is the minimum age that one must be to qualify as an accredited Volunteer Examiner?

Select	Answer
A	18 years
B	21 years
C	16 years
D	There is no age limit

7. - G1E03

What is required to conduct communications with a digital station operating under automatic control outside the automatic control band segments?

Select	Answer
A	The station initiating the contact must be under local or remote control
B	The interrogating transmission must be made by another automatically controlled station
C	The control operator of the interrogating station must hold an Amateur Extra class license
D	No third-party traffic may be transmitted

8. - G2A08

What is the recommended way to break into a phone contact?

Select	Answer
A	Say “CQ” followed by the call sign of either station
B	Say “QRZ” several times, followed by your call sign
C	Say “Breaker Breaker”
D	Say your call sign once

9. - G2B02

What is the first thing you should do if you are communicating with another amateur station and hear a station in distress break in?

Select	Answer
A	Immediately cease all transmissions
B	Immediately decrease power to avoid interfering with the station in distress
C	Acknowledge the station in distress and determine what assistance may be needed
D	Inform your local emergency coordinator

10. - G2C01

Which of the following describes full break-in CW operation (QSK)?

Select	Answer
A	Automatic keyers, instead of hand keys, are used to send Morse code
B	Transmitting stations can receive between code characters and elements
C	An operator must activate a manual send/receive switch before and after every transmission
D	Breaking stations send the Morse code prosign “BK”

11. - G2D09

Which of the following is required when participating in a contest on HF frequencies?

Select	Answer
A	Submit a log to the contest sponsor
B	All these choices are correct
C	Identify your station according to normal FCC regulations
D	Send a QSL card to the stations worked, or QSL via Logbook of The World

12. - G2E15

Which of the following is a common location for FT8?

Select	Answer
A	Anywhere in the voice portion of the band
B	Anywhere in the CW portion of the band
C	Approximately 14.074 MHz to 14.077 MHz
D	Approximately 14.110 MHz to 14.113 MHz

13. - G3A04

Which of the following are the least reliable bands for long-distance communications during periods of low solar activity?

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

14. - G3B03

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

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

15. - G3C10

What is near vertical incidence skywave (NVIS) propagation?

Select	Answer
A	Double hop propagation near the LUF
B	Short distance MF or HF propagation at high elevation angles
C	Propagation near the MUF
D	Long path HF propagation at sunrise and sunset

16. - G4A09

What is the purpose of delaying RF output after activating a transmitter’s keying line to an external amplifier?

Select	Answer
A	To prevent key clicks on CW
B	To allow time for the amplifier to switch the antenna between the transceiver and the amplifier output
C	To allow time for the amplifier power supply to reach operating level
D	To prevent transient overmodulation

17. - G4B11

Which of the following must be connected to an antenna analyzer when it is being used for SWR measurements?

Select	Answer
A	All these choices are correct
B	Receiver
C	Antenna and feed line
D	Transmitter

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	Placing low-pass filters on all feed lines
C	Using surge suppressor power outlets
D	Bonding all equipment enclosures together

19. - G4D02

How does a speech processor affect a single sideband phone signal?

Select	Answer
A	It increases peak power
B	It reduces intermodulation distortion
C	It increases average power
D	It reduces harmonic distortion

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

21. - G5A12

What occurs in an LC circuit at resonance?

Select	Answer
A	Resistance is cancelled
B	The circuit radiates all its energy in the form of radio waves
C	Current and voltage are equal
D	Inductive reactance and capacitive reactance cancel

22. - G5B11

What is the ratio of PEP to average power for an unmodulated carrier?

Select	Answer
A	2.00
B	1.414
C	1.00
D	0.707

23. - G5C09

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

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

24. - G6A03

What is the approximate forward threshold voltage of a germanium diode?

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

25. - G6B08

How is an LED biased when emitting light?

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

26. - G7A02

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

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

27. - G7B09

What determines the frequency of an LC oscillator?

Select	Answer
A	The number of stages in the divider
B	The time delay of the lag circuit
C	The inductance and capacitance in the tank circuit
D	The number of stages in the counter

28. - G7C12

What is the frequency above which a low-pass filter’s output power is less than half the input power?

Select	Answer
A	Cutoff frequency
B	Rolloff frequency
C	Notch frequency
D	Neper frequency

29. - G8A13

What is a link budget?

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

30. - G8B02

What is the term for interference from a signal at twice the IF frequency from the desired signal?

Select	Answer
A	Quadrature response
B	Image response
C	Intermediate interference
D	Mixer interference

31. - G8C04

Which of the following describes Baudot code?

Select	Answer
A	A 7-bit code with start, stop, and parity bits
B	A 5-bit code with additional start and stop bits
C	A code using SELCAL and LISTEN
D	A code using error detection and correction

32. - G9A06

In what units is RF feed line loss usually expressed?

Select	Answer
A	Ohms per 100 feet
B	Ohms per 1,000 feet
C	Decibels per 1,000 feet
D	Decibels per 100 feet

33. - G9B08

How does the feed point impedance of a 1/2 wave dipole change as the feed point is moved from the center toward the ends?

Select	Answer
A	It steadily decreases
B	It peaks at about 1/8 wavelength from the end
C	It steadily increases
D	It is unaffected by the location of the feed point

34. - G9C05

What is the primary effect of increasing boom length and adding directors to a Yagi antenna?

Select	Answer
A	Resonant frequency is lower
B	Beamwidth increases
C	Gain increases
D	Front-to-back ratio decreases

35. - G9D01

Which of the following antenna types will be most effective as a near vertical incidence skywave (NVIS) antenna for short-skip communications on 40 meters during the day?

Select	Answer
A	A vertical dipole placed at approximately 1/2 wavelength above the ground
B	A horizontal dipole placed between 1/10 and 1/4 wavelength above the ground
C	A horizontal dipole placed at approximately 1/2 wavelength above the ground
D	A vertical antenna placed between 1/4 and 1/2 wavelength above the ground