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. - G0A12

What stations are subject to the FCC rules on RF exposure?

Select	Answer
A	Only stations transmitting more than 500 watts PEP
B	All stations with a time-averaged transmission of more than one milliwatt
C	Only stations with antennas lower than one wavelength above the ground
D	All commercial stations; amateur radio stations are exempt

2. - G0B10

Which of the following is a danger from lead-tin solder?

Select	Answer
A	RF energy can convert the lead into a poisonous gas
B	High voltages can cause lead-tin solder to disintegrate suddenly
C	Tin in the solder can “cold flow,” causing shorts in the circuit
D	Lead can contaminate food if hands are not washed carefully after handling the solder

3. - G1A10

What portion of the 10-meter band is available for repeater use?

Select	Answer
A	The portion between 28.1 MHz and 28.2 MHz
B	The portion between 28.3 MHz and 28.5 MHz
C	The entire band
D	The portion above 29.5 MHz

4. - G1B05

Which of the following one-way transmissions are permitted?

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

5. - G1C04

Which of the following is required by the FCC rules when operating in the 60-meter band?

Select	Answer
A	You must keep a record of all third-party traffic
B	You must keep a record of the date, time, frequency, power level, and stations worked
C	You must keep a record of the manufacturer of your equipment and the antenna used
D	If you are using an antenna other than a dipole, you must keep a record of the gain of your antenna

6. - G1D08

Which of the following criteria must be met for a non-US citizen to be an accredited Volunteer Examiner?

Select	Answer
A	None of these choices is correct; a non-US citizen cannot be a Volunteer Examiner
B	The person must hold an FCC granted amateur radio license of General class or above
C	The person must be a resident of the US for a minimum of 5 years
D	The person’s home citizenship must be in ITU region 2

7. - G1E12

When may third-party messages be transmitted via remote control?

Select	Answer
A	Under any circumstances in which third party messages are permitted by FCC rules
B	Under no circumstances except for emergencies
C	Only when the message is intended for third parties in areas where licensing is controlled by the FCC
D	Only when the message is intended for licensed radio amateurs

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	Less bandwidth used and greater power efficiency
D	Ease of tuning on receive and immunity to impulse noise

9. - G2B07

Which of the following complies with commonly accepted amateur practice when choosing a frequency on which to initiate a call?

Select	Answer
A	Follow the voluntary band plan
B	Identify your station by transmitting your call sign at least 3 times
C	All these choices are correct
D	Listen on the frequency for at least two minutes to be sure it is clear

10. - G2C06

What does the term “zero beat” mean in CW operation?

Select	Answer
A	Matching the transmit frequency to the frequency of a received signal
B	Matching the speed of the transmitting station
C	Sending without error
D	Operating split to avoid interference on frequency

11. - G2D02

Which of the following are objectives of the Volunteer Monitor Program?

Select	Answer
A	To provide emergency and public safety communications
B	To coordinate repeaters for efficient and orderly spectrum usage
C	To conduct efficient and orderly amateur licensing examinations
D	To encourage amateur radio operators to self-regulate and comply with the rules

12. - G2E10

Which of the following is a way to establish contact with a digital messaging system gateway station?

Select	Answer
A	Send an email to the system control operator
B	Transmit a connect message on the station’s published frequency
C	Send QRL in Morse code
D	Respond when the station broadcasts its SSID

13. - G3A10

What causes HF propagation conditions to vary periodically in a 26- to 28-day cycle?

Select	Answer
A	The position of the Moon in its orbit
B	Rotation of the Sun’s surface layers around its axis
C	Long term oscillations in the upper atmosphere
D	Cyclic variation in Earth’s radiation belts

14. - G3B07

What does LUF stand for?

Select	Answer
A	Lowest Usable Frequency for communications to any point outside a 100-mile radius
B	The Lowest Usable Frequency for communications between two specific points
C	The Lowest Usable Frequency during a 24-hour period
D	Lowest Usable Frequency during the past 60 minutes

15. - G3C08

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

Select	Answer
A	Propagation is via ground waves, which absorb most of the signal 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 ducts in the F region, which absorb most of the energy

16. - G4A07

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

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

17. - G4B05

Why do voltmeters have high input impedance?

Select	Answer
A	It improves the resolution of the readings
B	It improves the frequency response
C	It allows for higher voltages to be safely measured
D	It decreases the loading on circuits being measured

18. - G4C08

Which of the following would reduce RF interference caused by common-mode current on an audio cable?

Select	Answer
A	Connect the center conductor to the shield of all cables to short circuit the RFI signal
B	Ground the center conductor of the audio cable causing the interference
C	Add an additional insulating jacket to the cable
D	Place a ferrite choke on the cable

19. - G4D05

How does a signal that reads 20 dB over S9 compare to one that reads S9 on a receiver, assuming a properly calibrated S meter?

Select	Answer
A	It is 20 times more powerful
B	It is 100 times more powerful
C	It is 20 times less powerful
D	It is 10 times less powerful

20. - G4E04

Why should DC power for a 100-watt HF transceiver not be supplied by a vehicle’s auxiliary power socket?

Select	Answer
A	The DC polarity of the socket is reversed from the polarity of modern HF transceivers
B	The socket is not wired with an RF-shielded power cable
C	Drawing more than 50 watts from this socket could cause the engine to overheat
D	The socket’s wiring may be inadequate for the current drawn by the transceiver

21. - G5A04

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

Select	Answer
A	Admittance
B	Conductance
C	Reluctance
D	Reactance

22. - G5B05

How many watts are consumed when a current of 7.0 milliamperes flows through a 1,250-ohm resistance?

Select	Answer
A	Approximately 11 milliwatts
B	Approximately 11 watts
C	Approximately 61 milliwatts
D	Approximately 61 watts

23. - G5C04

What is the approximate total resistance of a 100- and a 200-ohm resistor in parallel?

Select	Answer
A	67 ohms
B	300 ohms
C	75 ohms
D	150 ohms

24. - G6A11

What happens when an inductor is operated above its self-resonant frequency?

Select	Answer
A	It becomes capacitive
B	Its reactance increases
C	Harmonics are generated
D	Catastrophic failure is likely

25. - G6B08

How is an LED biased when emitting light?

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

26. - G7A08

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

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

27. - G7B03

Which of the following describes the function of a two-input AND gate?

Select	Answer
A	Output is low when either or both inputs are high
B	Output is high when either or both inputs are low
C	Output is high only when both inputs are high
D	Output is low only when both inputs are high

28. - G7C04

How is a product detector used?

Select	Answer
A	Used in test gear to detect spurious mixing products
B	Used in a single sideband receiver to extract the modulated signal
C	Used in an FM receiver to filter out unwanted sidebands
D	Used in transmitter to perform frequency multiplication

29. - G8A02

What is the name of the process that changes the phase angle of an RF signal to convey information?

Select	Answer
A	Phase modulation
B	Phase inversion
C	Phase transformation
D	Phase convolution

30. - G8B13

Which of the following is an odd-order intermodulation product of frequencies F1 and F2?

Select	Answer
A	5F1-3F2
B	All these choices are correct
C	3F1-F2
D	2F1-F2

31. - G8C16

Which of the following provide digital voice modes?

Select	Answer
A	DMR, D-STAR, and SystemFusion
B	WSPR, MFSK16, and EasyPAL
C	Winlink, PACTOR II, and PACTOR III
D	FT8, FT4, and FST4

32. - G9A02

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

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

33. - G9B02

Which of the following is a common way to adjust the feed point impedance of an elevated quarter-wave ground-plane vertical antenna to be approximately 50 ohms?

Select	Answer
A	Coil the radials
B	Slope the radials upward
C	Slope the radials downward
D	Lengthen the radials beyond one wavelength

34. - G9C11

What is a beta or hairpin match?

Select	Answer
A	A shorted transmission line stub placed at the feed point of a Yagi antenna to provide impedance matching
B	A series capacitor selected to cancel the inductive reactance of a folded dipole antenna
C	A 1/4 wavelength section of 75-ohm coax in series with the feed point of a Yagi to provide impedance matching
D	A section of 300-ohm twin-lead transmission line used to match a folded dipole antenna

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