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

2. - G0B09

Which of the following is true of an emergency generator installation?

Select	Answer
A	The generator should be operated in a well-ventilated area
B	All these choices are correct
C	Fuel should be stored near the generator for rapid refueling in case of an emergency
D	The generator must be insulated from ground

3. - G1A03

On which of the following bands is image transmission prohibited?

Select	Answer
A	160 meters
B	30 meters
C	20 meters
D	12 meters

4. - G1B07

What are the restrictions on the use of abbreviations or procedural signals in the amateur service?

Select	Answer
A	They are not permitted
B	Only “Q” signals are permitted
C	They are limited to those expressly listed in Part 97 of the FCC rules
D	They may be used if they do not obscure the meaning of a message

5. - G1C05

What is the limit for transmitter power on the 28 MHz band for a General Class control operator?

Select	Answer
A	1500 watts PEP output
B	1000 watts PEP output
C	2000 watts PEP output
D	100 watts PEP output

6. - G1D04

Who must observe the administration of a Technician class license examination?

Select	Answer
A	At least three Volunteer Examiners of Technician class
B	At least three Volunteer Examiners of General class or higher
C	At least two Volunteer Examiners of General class or higher
D	At least two Volunteer Examiners of Technician class or higher

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	No third-party traffic may be transmitted
D	The control operator of the interrogating station must hold an Amateur Extra class license

8. - G2A06

Which of the following is an advantage of using single sideband, as compared to other analog voice modes on the HF amateur bands?

Select	Answer
A	Very high-fidelity voice modulation
B	Less subject to interference from atmospheric static crashes
C	Ease of tuning on receive and immunity to impulse noise
D	Less bandwidth used and greater power efficiency

9. - G2B09

Who may be the control operator of an amateur station transmitting in RACES to assist relief operations during a disaster?

Select	Answer
A	Only a RACES net control operator
B	Any control operator when normal communication systems are operational
C	A person holding an FCC-issued amateur operator license or an appropriate government official
D	Only a person holding an FCC-issued amateur operator license

10. - G2C09

What does the Q signal “QSL” mean?

Select	Answer
A	We have worked before
B	Send slower
C	I have received and understood
D	We have already confirmed the contact

11. - G2D07

Which of the following are examples of the NATO Phonetic Alphabet?

Select	Answer
A	Alpha, Bravo, Charlie, Delta
B	Able, Baker, Charlie, Dog
C	Adam, Boy, Charles, David
D	America, Boston, Canada, Denmark

12. - G2E02

What is VARA?

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

13. - G3A13

What does the A-index measure?

Select	Answer
A	The relative position of sunspots on the surface of the Sun
B	The amount of polarization of the Sun’s electric field
C	The long-term stability of Earth’s geomagnetic field
D	The solar radio flux at Boulder, Colorado

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 below the critical frequency
D	Just above the critical frequency

15. - G3C05

Why is long-distance communication on the 40-, 60-, 80-, and 160-meter bands more difficult during the day?

Select	Answer
A	The D region absorbs signals at these frequencies during daylight hours
B	The F region is unstable during daylight hours
C	The F region absorbs signals at these frequencies during daylight hours
D	The E region is unstable during daylight hours

16. - G4A04

What is the effect on plate current of the correct setting of a vacuum-tube RF power amplifier’s TUNE control?

Select	Answer
A	A pronounced dip
B	A slow, rhythmic oscillation
C	No change will be observed
D	A pronounced peak

17. - G4B12

What effect can strong signals from nearby transmitters have on an antenna analyzer?

Select	Answer
A	Received power that interferes with SWR readings
B	All these choices are correct
C	Generation of harmonics which interfere with frequency readings
D	Desensitization which can cause intermodulation products which interfere with impedance readings

18. - G4C07

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

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

19. - G4D01

What is the purpose of a speech processor in a transceiver?

Select	Answer
A	Increase the apparent loudness of transmitted voice signals
B	Increase transmitter bass response for more natural-sounding SSB signals
C	Prevent distortion of voice signals
D	Decrease high-frequency voice output to prevent out-of-band operation

20. - G4E06

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

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

21. - G5A07

What is the term for the inverse of impedance?

Select	Answer
A	Reluctance
B	Susceptance
C	Admittance
D	Conductance

22. - G5B10

What percentage of power loss is equivalent to a loss of 1 dB?

Select	Answer
A	20.6 percent
B	12.2 percent
C	10.9 percent
D	25.9 percent

23. - G5C07

What transformer turns ratio matches an antenna’s 600-ohm feed point impedance to a 50-ohm coaxial cable?

Select	Answer
A	24 to 1
B	12 to 1
C	3.5 to 1
D	144 to 1

24. - G6A10

Which element of a vacuum tube regulates the flow of electrons between cathode and plate?

Select	Answer
A	Trigger electrode
B	Suppressor grid
C	Screen grid
D	Control grid

25. - G6B07

Which of the following describes a type N connector?

Select	Answer
A	A moisture-resistant RF connector useful to 10 GHz
B	A nickel plated version of the PL-259
C	A low noise figure VHF connector
D	A small bayonet connector used for data circuits

26. - G7A07

What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load?

Select	Answer
A	A series of DC pulses at the same frequency as the AC input
B	A series of DC pulses at twice the frequency of the AC input
C	A sine wave at half the frequency of the AC input
D	A steady DC voltage

27. - G7B11

For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?

Select	Answer
A	All these choices are correct
B	AM
C	SSB
D	FM

28. - G7C13

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

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

29. - G8A01

How is direct binary FSK modulation generated?

Select	Answer
A	By reconfiguring the CW keying input to act as a tone generator
B	By changing an oscillator’s frequency directly with a digital control signal
C	By keying an FM transmitter with a sub-audible tone
D	By using a transceiver’s computer data interface protocol to change frequencies

30. - G8B04

What is the stage in a VHF FM transmitter that generates a harmonic of a lower frequency signal to reach the desired operating frequency?

Select	Answer
A	Reactance modulator
B	Balanced converter
C	Multiplier
D	Mixer

31. - G8C08

Which of the following statements is true about PSK31?

Select	Answer
A	Upper case letters use longer Varicode bit sequences and thus slow down transmission
B	Upper case letters are sent with more power
C	Error correction is used to ensure accurate message reception
D	Higher power is needed as compared to RTTY for similar error rates

32. - G9A04

What causes reflected power at an antenna’s feed point?

Select	Answer
A	Using more transmitter power than the antenna can handle
B	A difference between feed line impedance and antenna feed point impedance
C	Feeding the antenna with unbalanced feed line
D	Operating an antenna at its resonant frequency

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

34. - G9C03

How do the lengths of a three-element Yagi reflector and director compare to that of the driven element?

Select	Answer
A	They are all the same length
B	Relative length depends on the frequency of operation
C	The reflector is shorter, and the director is longer
D	The reflector is longer, and the director is shorter

35. - G9D03

In which direction is the maximum radiation from a VHF/UHF “halo” antenna?

Select	Answer
A	On the same side as the feed point
B	Omnidirectional in the plane of the halo
C	Broadside to the plane of the halo
D	Opposite the feed point