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. - G0A04

What does “time averaging” mean when evaluating RF radiation exposure?

Select	Answer
A	The average amount of power developed by the transmitter over a specific 24-hour period
B	The total RF exposure averaged over a certain period
C	The total time of the exposure
D	The average time it takes RF radiation to have any long-term effect on the body

2. - G0B12

What is the purpose of a power supply interlock?

Select	Answer
A	To ensure that dangerous voltages are removed if the cabinet is opened
B	To shut down the unit if it becomes too hot
C	To shut off the power supply if too much voltage is produced
D	To prevent unauthorized changes to the circuit that would void the manufacturer’s warranty

3. - G1A09

Which of the following frequencies is within the General class portion of the 15-meter band?

Select	Answer
A	14250 kHz
B	18155 kHz
C	24900 kHz
D	21300 kHz

4. - G1B09

On what HF frequencies are automatically controlled beacons permitted?

Select	Answer
A	28.20 MHz to 28.30 MHz
B	21.08 MHz to 21.09 MHz
C	On any frequency if transmissions are in Morse code
D	On any frequency if power is less than 1 watt

5. - G1C07

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

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

6. - G1D06

Until an upgrade to General class is shown in the FCC database, when must a Technician licensee identify with “AG” after their call sign?

Select	Answer
A	A special identifier is not required if their General class license application has been filed with the FCC
B	Whenever they operate using Technician frequency privileges
C	Whenever they operate on any amateur frequency
D	Whenever they operate using General class frequency privileges

7. - G1E05

What are the restrictions on messages sent to a third party in a country with which there is a Third-Party Agreement?

Select	Answer
A	The message must be limited to no longer than 1 minute in duration and the name of the third party must be recorded in the station log
B	They must relate to amateur radio, or remarks of a personal character, or messages relating to emergencies or disaster relief
C	They must be for other licensed amateurs
D	They must relate to emergencies or disaster relief

8. - G2A01

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

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

9. - G2B10

Which of the following is good amateur practice for net management?

Select	Answer
A	Always use multiple sets of phonetics during check-in
B	All these choices are correct
C	Have a backup frequency in case of interference or poor conditions
D	Transmit the full net roster at the beginning of every session

10. - G2C11

What does the Q signal “QRV” mean?

Select	Answer
A	There is interference on the frequency
B	You are sending too fast
C	I am ready to receive
D	I am quitting for the day

11. - G2D10

What is QRP operation?

Select	Answer
A	Traffic relay procedure net operation
B	Transmission using Quick Response Protocol
C	Remote piloted model control
D	Low-power transmit operation

12. - G2E02

What is VARA?

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

13. - G3A09

How can high geomagnetic activity benefit radio communications?

Select	Answer
A	Increases signal strength for HF signals passing through the polar regions
B	Improve HF long path propagation
C	Creates auroras that can reflect VHF signals
D	Reduce long delayed echoes

14. - G3B01

What is a characteristic of skywave signals arriving at your location by both short-path and long-path propagation?

Select	Answer
A	Periodic fading approximately every 10 seconds
B	Signal strength increased by 3 dB
C	The signal might be cancelled causing severe attenuation
D	A slightly delayed echo might be heard

15. - G3C06

What is a characteristic of HF scatter?

Select	Answer
A	Scatter propagation occurs only at night
B	There are very large, sudden swings in signal strength
C	Signals have a fluttering sound
D	Phone signals have high intelligibility

16. - G4A07

What happens as a receiver’s noise reduction control level is increased?

Select	Answer
A	Received frequency may become unstable
B	Received signals may become distorted
C	Received frequency may shift several kHz
D	CW signals may become severely attenuated

17. - G4B10

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

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

18. - G4C11

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

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

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 below the edge of the band
C	At least 1 kHz below the edge of the segment
D	At least 3 kHz above the edge of the band

20. - G4E08

In what configuration are the individual cells in a solar panel connected together?

Select	Answer
A	Shunt
B	Bypass
C	Series-parallel
D	Full-wave bridge

21. - G5A04

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

Select	Answer
A	Admittance
B	Reactance
C	Conductance
D	Reluctance

22. - G5B11

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

Select	Answer
A	2.00
B	0.707
C	1.414
D	1.00

23. - G5C13

Which of the following components should be added to a capacitor to increase the capacitance?

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

24. - G6A03

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

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

25. - G6B03

Which of the following is an advantage of CMOS integrated circuits compared to TTL integrated circuits?

Select	Answer
A	Better suited for power supply regulation
B	High power handling capability
C	Low power consumption
D	Better suited for RF amplification

26. - G7A12

Which symbol in Figure G7-1 represents a solid core transformer?

Select	Answer
A	Symbol 7
B	Symbol 4
C	Symbol 6
D	Symbol 1

27. - G7B09

What determines the frequency of an LC oscillator?

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

28. - G7C13

What term specifies a filter’s maximum ability to reject signals outside its passband?

Select	Answer
A	Notch depth
B	Rolloff
C	Ultimate rejection
D	Insertion loss

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

30. - G8B06

What is the total bandwidth of an FM phone transmission having 5 kHz deviation and 3 kHz modulating frequency?

Select	Answer
A	16 kHz
B	5 kHz
C	8 kHz
D	3 kHz

31. - G8C07

Which of the following narrow-band digital modes can receive signals with very low signal-to-noise ratios?

Select	Answer
A	FT8
B	MFSK32
C	MSK144
D	AMTOR

32. - G9A11

What is the effect of transmission line loss on SWR measured at the input to the line?

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

33. - G9B07

How does the feed point impedance of a horizontal 1/2 wave dipole antenna change as the antenna height is reduced to 1/10 wavelength above ground?

Select	Answer
A	It steadily decreases
B	It steadily increases
C	It peaks at about 1/8 wavelength above ground
D	It is unaffected by the height above ground

34. - G9C01

Which of the following would increase the bandwidth of a Yagi antenna?

Select	Answer
A	Tapered-diameter elements
B	Loading coils in series with the element
C	Larger-diameter elements
D	Closer element spacing

35. - G9D02

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

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

Figure G7-1