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. - G0A05

What must you do if an evaluation of your station shows that the RF energy radiated by your station exceeds permissible limits for possible human absorption?

Select	Answer
A	Secure written permission from your neighbors to operate above the controlled MPE limits
B	All these choices are correct
C	File an Environmental Impact Statement (EIS-97) with the FCC
D	Take action to prevent human exposure to the excessive RF fields

2. - G0B05

Which of the following conditions will cause a ground fault circuit interrupter (GFCI) to disconnect AC power?

Select	Answer
A	Current flowing from one or more of the hot wires to the neutral wire
B	Current flowing from one or more of the hot wires directly to ground
C	All these choices are correct
D	Overvoltage on the hot wires

3. - G1A06

Which of the following applies when the FCC rules designate the amateur service as a secondary user on a band?

Select	Answer
A	Amateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station
B	Amateur stations must not cause harmful interference to primary users and must accept interference from primary users
C	Amateur stations may use the band only during emergencies
D	Amateur stations may only operate during specific hours of the day, while primary users are permitted 24-hour use of the band

4. - G1B03

Which of the following is a purpose of a beacon station as identified in the FCC rules?

Select	Answer
A	Observation of propagation and reception
B	Automatic identification of repeaters
C	Transmission of bulletins of general interest to amateur radio licensees
D	All these choices are correct

5. - G1C05

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

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

6. - G1D07

Volunteer Examiners are accredited by what organization?

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

7. - G1E11

On what bands may automatically controlled stations transmitting RTTY or data emissions communicate with other automatically controlled digital stations?

Select	Answer
A	On any band segment where digital operation is permitted
B	Only in the non-phone Extra Class segments of the bands
C	Anywhere in the non-phone segments of the 10-meter or shorter wavelength bands
D	Anywhere in the 6-meter or shorter wavelength bands, and in limited segments of some of the HF bands

8. - G2A10

Which of the following statements is true of VOX operation versus PTT operation?

Select	Answer
A	It occupies less bandwidth
B	It allows “hands free” operation
C	It provides more power output
D	The received signal is more natural sounding

9. - G2B06

How can you avoid harmful interference on an apparently clear frequency before calling CQ on CW or phone?

Select	Answer
A	Send “QSY” on CW or if using phone, announce “the frequency is in use,” then give your call sign and listen for a response
B	Send the letter “V” in Morse code several times and listen for a response, or say “test” several times and listen for a response
C	Listen for 2 minutes before calling CQ
D	Send “QRL?” on CW, followed by your call sign; or, if using phone, ask if the frequency is in use, followed by your call sign

10. - G2C08

What prosign is sent to indicate the end of a formal message when using CW?

Select	Answer
A	SK
B	AR
C	BK
D	KN

11. - G2D01

What is the Volunteer Monitor Program?

Select	Answer
A	Amateur volunteers who conduct amateur licensing examinations
B	Amateur volunteers who conduct frequency coordination for amateur VHF repeaters
C	Amateur volunteers who use their station equipment to help civil defense organizations in times of emergency
D	Amateur volunteers who are formally enlisted to monitor the airwaves for rules violations

12. - G2E04

Which of the following is good practice when choosing a transmitting frequency to answer a station calling CQ using FT8?

Select	Answer
A	Find a clear frequency during the alternate time slot to the calling station
B	Find a clear frequency during the same time slot as the calling station
C	Always call on the station’s frequency
D	Call on any frequency in the waterfall except the station’s frequency

13. - G3A06

What is a geomagnetic storm?

Select	Answer
A	A thunderstorm that affects radio propagation
B	Ripples in the geomagnetic force
C	A temporary disturbance in Earth’s geomagnetic field
D	A sudden drop in the solar flux index

14. - G3B12

Which of the following is typical of the lower HF frequencies during the summer?

Select	Answer
A	Heavy distortion on signals due to photon absorption
B	High levels of atmospheric noise or static
C	Poor propagation at any time of day
D	World-wide propagation during daylight hours

15. - G3C08

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

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

16. - G4A02

What is the benefit of using the opposite or “reverse” sideband when receiving CW?

Select	Answer
A	Interference from impulse noise will be eliminated
B	Accidental out-of-band operation can be prevented
C	More stations can be accommodated within a given signal passband
D	It may be possible to reduce or eliminate interference from other signals

17. - G4B12

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

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

18. - G4C02

Which of the following could be a cause of interference covering a wide range of frequencies?

Select	Answer
A	Lack of rectification of the transmitter’s signal in power conductors
B	Not using a balun or line isolator to feed balanced antennas
C	Arcing at a poor electrical connection
D	Using a balun to feed an unbalanced antenna

19. - G4D06

How much change in signal strength is typically represented by one S unit?

Select	Answer
A	12 dB
B	15 dB
C	18 dB
D	6 dB

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

21. - G5A01

What happens when inductive and capacitive reactance are equal in a series LC circuit?

Select	Answer
A	Impedance is equal to the arithmetic mean of the inductance and capacitance
B	Resonance causes impedance to be very high
C	Impedance is equal to the geometric mean of the inductance and capacitance
D	Resonance causes impedance to be very low

22. - G5B06

What is the PEP produced by 200 volts peak-to-peak across a 50-ohm dummy load?

Select	Answer
A	400 watts
B	100 watts
C	1.4 watts
D	353.5 watts

23. - G5C08

What is the equivalent capacitance of two 5.0-nanofarad capacitors and one 750-picofarad capacitor connected in parallel?

Select	Answer
A	1,733 picofarads
B	3,583 picofarads
C	576.9 nanofarads
D	10.750 nanofarads

24. - G6A09

Which of the following describes MOSFET construction?

Select	Answer
A	The source is formed by depositing metal on silicon
B	The gate is formed by a back-biased junction
C	The source is separated from the drain by a thin insulating layer
D	The gate is separated from the channel by a thin insulating layer

25. - G6B06

What kind of device is an integrated circuit operational amplifier?

Select	Answer
A	Digital
B	Programmable Logic
C	Analog
D	MMIC

26. - G7A07

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

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

27. - G7B02

Which of these classes of amplifiers has the highest efficiency?

Select	Answer
A	Class C
B	Class B
C	Class AB
D	Class A

28. - G7C11

Which of these functions is performed by software in a software-defined radio (SDR)?

Select	Answer
A	Filtering
B	Modulation
C	Detection
D	All these choices are correct

29. - G8A12

What is QPSK modulation?

Select	Answer
A	Modulation using quadra-pole sideband keying to generate spread spectrum signals
B	Modulation using Fast Fourier Transforms to generate frequencies at the first, second, third, and fourth harmonics of the carrier frequency to improve noise immunity
C	Modulation using quasi-parallel to serial conversion to reduce bandwidth
D	Modulation in which digital data is transmitted using 0-, 90-, 180- and 270-degrees phase shift to represent pairs of bits

30. - G8B13

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

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

31. - G8C06

What action results from a failure to exchange information due to excessive transmission attempts when using an ARQ mode?

Select	Answer
A	The connection is dropped
B	Encoding reverts to the default character set
C	The checksum overflows
D	Packets will be routed incorrectly

32. - G9A11

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

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

33. - G9B04

What is the radiation pattern of a dipole antenna in free space in a plane containing the conductor?

Select	Answer
A	It is a figure-eight off both ends of the antenna
B	It has a pair of lobes on one side of the antenna and a single lobe on the other side
C	It is a figure-eight at right angles to the antenna
D	It is a circle (equal radiation in all directions)

34. - G9C09

In free space, how does the gain of two three-element, horizontally polarized Yagi antennas spaced vertically 1/2 wavelength apart typically compare to the gain of a single three-element Yagi?

Select	Answer
A	Approximately 9 dB higher
B	Approximately 1.5 dB higher
C	Approximately 6 dB higher
D	Approximately 3 dB higher

35. - G9D06

Which of the following is an advantage of a log-periodic antenna?

Select	Answer
A	Polarization diversity
B	Wide bandwidth
C	Higher gain per element than a Yagi antenna
D	Harmonic suppression