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. - G0A11

What precaution should be taken if you install an indoor transmitting antenna?

Select	Answer
A	Position the antenna along the edge of a wall to reduce parasitic radiation
B	Make sure the antenna is properly shielded
C	Locate the antenna close to your operating position to minimize feed-line radiation
D	Make sure that MPE limits are not exceeded in occupied areas

2. - G0B11

Which of the following is required for lightning protection ground rods?

Select	Answer
A	They must be bonded together with all other grounds
B	Lightning grounds must be connected to all ungrounded wiring
C	They must be bonded to all buried water and gas lines
D	Bends in ground wires must be made as close as possible to a right angle

3. - G1A03

On which of the following bands is image transmission prohibited?

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

4. - G1B05

Which of the following one-way transmissions are permitted?

Select	Answer
A	All these choices are correct
B	Transmissions to assist with learning the International Morse code
C	Regular transmissions offering equipment for sale, if intended for amateur radio use
D	Unidentified test transmissions of less than 10 seconds in duration

5. - G1C10

What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 10-meter band?

Select	Answer
A	56 kilobaud
B	300 baud
C	19.6 kilobaud
D	1200 baud

6. - G1D07

Volunteer Examiners are accredited by what organization?

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

7. - G1E10

Why should an amateur operator normally avoid transmitting on 14.100, 18.110, 21.150, 24.930 and 28.200 MHz?

Select	Answer
A	A system of automatic digital stations operates on those frequencies
B	A system of propagation beacon stations operates on those frequencies
C	These frequencies are set aside for emergency operations
D	These frequencies are set aside for bulletins from the FCC

8. - G2A01

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

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

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

10. - G2C04

What does the Q signal “QRL?” mean?

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

11. - G2D05

Which of the following indicates that you are looking for an HF contact with any station?

Select	Answer
A	Say “QTC” followed by “this is” and your call sign -- if no answer, change frequency and repeat
B	Sign your call sign once, followed by the words “listening for a call” -- if no answer, change frequency and repeat
C	Repeat “CQ” a few times, followed by “this is,” then your call sign a few times, then pause to listen, repeat as necessary
D	Transmit an unmodulated carried for approximately 10 seconds, followed by “this is” and your call sign, and pause to listen -- repeat as necessary

12. - G2E14

What could be wrong if you cannot decode an RTTY or other FSK signal even though it is apparently tuned in properly?

Select	Answer
A	You may be listening on the wrong sideband
B	All these choices are correct
C	The mark and space frequencies may be reversed
D	You may have selected the wrong baud rate

13. - G3A14

How is long distance radio communication usually affected by the charged particles that reach Earth from solar coronal holes?

Select	Answer
A	HF communication is improved
B	VHF/UHF ducting is disturbed
C	HF communication is disturbed
D	VHF/UHF ducting is improved

14. - G3B06

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

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

15. - G3C09

What type of propagation allows signals to be heard in the transmitting station’s skip zone?

Select	Answer
A	Short-path
B	Chordal hop
C	Faraday rotation
D	Scatter

16. - G4A01

What is the purpose of the notch filter found on many HF transceivers?

Select	Answer
A	To restrict the transmitter voice bandwidth
B	To remove interfering splatter generated by signals on adjacent frequencies
C	To reduce interference from carriers in the receiver passband
D	To eliminate receiver interference from impulse noise sources

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	Transmitter
C	Antenna and feed line
D	Receiver

18. - G4C09

How can the effects of ground loops be minimized?

Select	Answer
A	Avoid using lock washers and star washers when making ground connections
B	Connect all ground conductors in series
C	Bond equipment enclosures together
D	Connect the AC neutral conductor to the ground wire

19. - G4D01

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

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

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

21. - G5A02

What is reactance?

Select	Answer
A	Reinforcement of the flow of alternating current caused by capacitance or inductance
B	Opposition to the flow of alternating current caused by capacitance or inductance
C	Reinforcement of the flow of direct current caused by resistance
D	Opposition to the flow of direct current caused by resistance

22. - G5B11

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

Select	Answer
A	1.414
B	2.00
C	1.00
D	0.707

23. - G5C11

What is the inductance of a circuit with a 20-millihenry inductor connected in series with a 50-millihenry inductor?

Select	Answer
A	70 millihenries
B	14.3 millihenries
C	7 millihenries
D	1,000 millihenries

24. - G6A08

Which of the following is characteristic of low voltage ceramic capacitors?

Select	Answer
A	Comparatively low cost
B	High stability
C	High capacitance for given volume
D	Tight tolerance

25. - G6B01

What determines the performance of a ferrite core at different frequencies?

Select	Answer
A	Its conductivity
B	Its thickness
C	The composition, or “mix,” of materials used
D	The ratio of outer diameter to inner diameter

26. - G7A07

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

Select	Answer
A	A steady DC voltage
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 series of DC pulses at the same frequency as the AC input

27. - G7B08

How is the efficiency of an RF power amplifier determined?

Select	Answer
A	Divide the RF output power by the DC input power
B	Divide the DC input power by the DC output power
C	Multiply the RF input power by the reciprocal of the RF output power
D	Add the RF input power to the DC output power

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	Neper frequency
C	Rolloff frequency
D	Notch frequency

29. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

Select	Answer
A	Phase modulation
B	Single sideband
C	Vestigial sideband
D	Frequency modulation

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	Multiplier
B	Mixer
C	Balanced converter
D	Reactance modulator

31. - G8C04

Which of the following describes Baudot code?

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

32. - G9A10

What standing wave ratio results from connecting a 50-ohm feed line to a 10-ohm resistive load?

Select	Answer
A	1:2
B	1:5
C	2:1
D	5:1

33. - G9B09

Which of the following is an advantage of using a horizontally polarized as compared to a vertically polarized HF antenna?

Select	Answer
A	Lower ground losses
B	Lower radiation resistance
C	Shorter radials
D	Lower feed point impedance

34. - G9C08

What is meant by the “main lobe” of a directive antenna?

Select	Answer
A	The maximum voltage standing wave point on a radiating element
B	The point of maximum current in a radiating antenna element
C	The magnitude of the maximum vertical angle of radiation
D	The direction of maximum radiated field strength from the antenna

35. - G9D07

Which of the following describes a log-periodic antenna?

Select	Answer
A	Impedance varies periodically as a function of frequency
B	SWR varies periodically as a function of boom length
C	Gain varies logarithmically as a function of frequency
D	Element length and spacing vary logarithmically along the boom