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

2. - G0B07

Which of these choices should be observed when climbing a tower using a safety harness?

Select	Answer
A	Ensure that all heavy tools are securely fastened to the harness
B	Always hold on to the tower with one hand
C	All these choices are correct
D	Confirm that the harness is rated for the weight of the climber and that it is within its allowable service life

3. - G1A09

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

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

4. - G1B01

What is the maximum height above ground for an antenna structure not near a public use airport without requiring notification to the FAA and registration with the FCC?

Select	Answer
A	100 feet
B	250 feet
C	200 feet
D	50 feet

5. - G1C11

What measurement is specified by FCC rules that regulate maximum power?

Select	Answer
A	RMS input to the antenna
B	RMS output from the transmitter
C	PEP output from the transmitter
D	PEP input to the antenna

6. - G1D07

Volunteer Examiners are accredited by what organization?

Select	Answer
A	A Volunteer Examiner Coordinator
B	The Wireless Telecommunications Bureau
C	The Federal Communications Commission
D	The Universal Licensing System

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	They must be for other licensed amateurs
B	They must relate to amateur radio, or remarks of a personal character, or messages relating to emergencies or disaster relief
C	They must relate to emergencies or disaster relief
D	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

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. - G2B05

When selecting an SSB transmitting frequency, what minimum separation should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	Approximately 6 kHz
B	2 kHz to 3 kHz
C	150 Hz to 500 Hz
D	5 Hz to 50 Hz

10. - G2C04

What does the Q signal “QRL?” mean?

Select	Answer
A	“Are you operating full break-in?” or “Can you operate full break-in?”
B	“Are you busy?” or “Is this frequency in use?”
C	“Will you keep the frequency clear?”
D	“Are you listening only for a specific station?”

11. - G2D10

What is QRP operation?

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

12. - G2E02

What is VARA?

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

13. - G3A01

How does a higher sunspot number affect HF propagation?

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

14. - G3B06

What usually happens to radio waves with frequencies below the LUF?

Select	Answer
A	They pass through the ionosphere
B	They are refracted and trapped in the ionosphere to circle Earth
C	They are attenuated before reaching the destination
D	They are refracted back to Earth

15. - G3C08

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

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

16. - G4A10

What is the function of an electronic keyer?

Select	Answer
A	To allow time for switching the antenna from the receiver to the transmitter
B	Automatic transmit/receive switching
C	Computer interface for PSK and RTTY operation
D	Automatic generation of dots and dashes for CW operation

17. - G4B09

When is an analog multimeter preferred to a digital multimeter?

Select	Answer
A	When adjusting circuits for maximum or minimum values
B	When measuring the frequency of an oscillator
C	When high precision is desired
D	When testing logic circuits

18. - G4C06

What is a possible effect of a resonant ground connection?

Select	Answer
A	A ground loop
B	Corrosion of the ground rod
C	High RF voltages on the enclosures of station equipment
D	Overheating of ground straps

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

20. - G4E01

What is the purpose of a capacitance hat on a mobile antenna?

Select	Answer
A	To lower the radiation angle
B	To electrically lengthen a physically short antenna
C	To increase the power handling capacity of a whip antenna
D	To reduce radiation resistance

21. - G5A04

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

Select	Answer
A	Reactance
B	Conductance
C	Reluctance
D	Admittance

22. - G5B09

What is the RMS voltage of a sine wave with a value of 17 volts peak?

Select	Answer
A	34 volts
B	24 volts
C	12 volts
D	8.5 volts

23. - G5C02

What is the output voltage if an input signal is applied to the secondary winding of a 4:1 voltage step-down transformer instead of the primary winding?

Select	Answer
A	The input voltage is divided by 4
B	The input voltage is multiplied by 4
C	Additional resistance must be added in series with the primary to prevent overload
D	Additional resistance must be added in parallel with the secondary to prevent overload

24. - G6A01

What is the minimum allowable discharge voltage for maximum life of a standard 12-volt lead-acid battery?

Select	Answer
A	12 volts
B	8.5 volts
C	10.5 volts
D	6 volts

25. - G6B12

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

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

26. - G7A08

Which of the following is characteristic of a switchmode power supply as compared to a linear power supply?

Select	Answer
A	Fewer circuit components are required
B	Faster switching time makes higher output voltage possible
C	High-frequency operation allows the use of smaller components
D	Inherently more stable

27. - G7B07

Which of the following are basic components of a sine wave oscillator?

Select	Answer
A	An amplifier and a divider
B	A filter and an amplifier operating in a feedback loop
C	A frequency multiplier and a mixer
D	A circulator and a filter operating in a feed-forward loop

28. - G7C06

Which of the following is an advantage of a digital signal processing (DSP) filter compared to an analog filter?

Select	Answer
A	The DSP filter is much more effective at VHF frequencies
B	A wide range of filter bandwidths and shapes can be created
C	Fewer digital components are required
D	Mixing products are greatly reduced

29. - G8A04

What emission is produced by a reactance modulator connected to a transmitter RF amplifier stage?

Select	Answer
A	Amplitude modulation
B	Pulse modulation
C	Phase modulation
D	Multiplex modulation

30. - G8B05

Which intermodulation products are closest to the original signal frequencies?

Select	Answer
A	Second harmonics
B	Odd-order
C	Intercept point
D	Even-order

31. - G8C03

What part of a packet radio frame contains the routing and handling information?

Select	Answer
A	Header
B	Preamble
C	Directory
D	Trailer

32. - G9A02

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

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

33. - G9B01

What is a characteristic of a random-wire HF antenna connected directly to the transmitter?

Select	Answer
A	It produces only vertically polarized radiation
B	It must be longer than 1 wavelength
C	Station equipment may carry significant RF current
D	It is more effective on the lower HF bands than on the higher bands

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 section of 300-ohm twin-lead transmission line used to match a folded dipole antenna
C	A series capacitor selected to cancel the inductive reactance of 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 deploying a capacitance hat
B	By varying its body capacitance
C	By extending and retracting the whip
D	By varying the base loading inductance