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. - G0A01

What is one way that RF energy can affect human body tissue?

Select	Answer
A	It heats body tissue
B	It causes the blood count to reach a dangerously low level
C	It cools body tissue
D	It causes radiation poisoning

2. - G0B10

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

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

3. - G1A08

Which HF bands have segments exclusively allocated to Amateur Extra licensees?

Select	Answer
A	80 meters, 40 meters, 20 meters, and 15 meters
B	60 meters, 30 meters, 17 meters, and 12 meters
C	All HF bands except 160 meters and 10 meters
D	All HF bands

4. - G1B05

Which of the following one-way transmissions are permitted?

Select	Answer
A	Transmissions to assist with learning the International Morse code
B	All these choices are correct
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. - G1C05

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

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

6. - G1D03

On which of the following band segments may you operate if you are a Technician class operator and have an unexpired Certificate of Successful Completion of Examination (CSCE) for General class privileges?

Select	Answer
A	On any General or Technician class band segment except 30 meters and 60 meters
B	Only the Technician band segments until your upgrade is posted in the FCC database
C	On any General or Technician class band segment
D	Only on the Technician band segments until you have a receipt for the FCC application fee payment

7. - G1E12

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

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

8. - G2A10

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

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

9. - G2B04

When selecting a CW transmitting frequency, what minimum separation from other stations should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	1 kHz to 3 kHz
B	3 kHz to 6 kHz
C	5 Hz to 50 Hz
D	150 Hz to 500 Hz

10. - G2C01

Which of the following describes full break-in CW operation (QSK)?

Select	Answer
A	Breaking stations send the Morse code prosign “BK”
B	An operator must activate a manual send/receive switch before and after every transmission
C	Transmitting stations can receive between code characters and elements
D	Automatic keyers, instead of hand keys, are used to send Morse code

11. - G2D01

What is the Volunteer Monitor Program?

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

12. - G2E01

Which mode is normally used when sending RTTY signals via AFSK with an SSB transmitter?

Select	Answer
A	LSB
B	CW
C	DSB
D	USB

13. - G3A11

How long does it take a coronal mass ejection to affect radio propagation on Earth?

Select	Answer
A	14 days
B	28 days
C	4 to 8 minutes
D	15 hours to several days

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 critical frequency
C	Just below the critical frequency
D	Just above the LUF

15. - G3C02

What is meant by the term “critical frequency” at a given incidence angle?

Select	Answer
A	The frequency at which the signal-to-noise ratio approaches unity
B	The highest frequency which is refracted back to Earth
C	The lowest frequency which is refracted back to Earth
D	The frequency at which the signal-to-noise ratio is 6 dB

16. - G4A07

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

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

17. - G4B12

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

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

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	Using a balun to feed an unbalanced antenna
C	Arcing at a poor electrical connection
D	Not using a balun or line isolator to feed balanced antennas

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 the apparent loudness of transmitted voice signals
C	Prevent distortion of voice signals
D	Increase transmitter bass response for more natural-sounding SSB signals

20. - G4E02

What is the purpose of a corona ball on an HF mobile antenna?

Select	Answer
A	To reduce RF voltage discharge from the tip of the antenna while transmitting
B	To reduce the chance of damage if the antenna should strike an object
C	To narrow the operating bandwidth of the antenna
D	To increase the “Q” of the antenna

21. - G5A12

What occurs in an LC circuit at resonance?

Select	Answer
A	Current and voltage are equal
B	The circuit radiates all its energy in the form of radio waves
C	Resistance is cancelled
D	Inductive reactance and capacitive reactance cancel

22. - G5B04

How many watts of electrical power are consumed by a 12 VDC light bulb that draws 0.2 amperes?

Select	Answer
A	24 watts
B	2.4 watts
C	60 watts
D	6 watts

23. - G5C09

What is the capacitance of three 100-microfarad capacitors connected in series?

Select	Answer
A	300 microfarads
B	3.0 microfarads
C	0.33 microfarads
D	33.3 microfarads

24. - G6A04

Which of the following is characteristic of an electrolytic capacitor?

Select	Answer
A	High capacitance for a given volume
B	Inexpensive RF capacitor
C	Much less leakage than any other type
D	Tight tolerance

25. - G6B08

How is an LED biased when emitting light?

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

26. - G7A04

What is characteristic of a half-wave rectifier in a power supply?

Select	Answer
A	Only one diode is required
B	The ripple frequency is twice that of a full-wave rectifier
C	The output voltage is two times the peak input voltage
D	More current can be drawn from the half-wave rectifier

27. - G7B05

How many states does a 3-bit binary counter have?

Select	Answer
A	3
B	8
C	16
D	6

28. - G7C02

What output is produced by a balanced modulator?

Select	Answer
A	Frequency modulated RF
B	Audio extracted from the modulation signal
C	Audio with equalized frequency response
D	Double-sideband modulated RF

29. - G8A03

What is the name of the process that changes the instantaneous frequency of an RF wave to convey information?

Select	Answer
A	Frequency transformation
B	Frequency convolution
C	Frequency conversion
D	Frequency modulation

30. - G8B06

What is the total bandwidth of an FM phone transmission having 5 kHz deviation and 3 kHz modulating frequency?

Select	Answer
A	8 kHz
B	5 kHz
C	3 kHz
D	16 kHz

31. - G8C06

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

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

32. - G9A09

What standing wave ratio results from connecting a 50-ohm feed line to a 200-ohm resistive load?

Select	Answer
A	2:1
B	1:4
C	4:1
D	1:2

33. - G9B12

What is the approximate length for a 1/4 wave monopole antenna cut for 28.5 MHz?

Select	Answer
A	16 feet
B	8 feet
C	11 feet
D	21 feet

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 series capacitor selected to cancel the inductive reactance of a folded dipole antenna
C	A shorted transmission line stub placed at the feed point of a Yagi antenna to provide impedance matching
D	A section of 300-ohm twin-lead transmission line used to match a folded dipole antenna

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	Opposite the feed point
D	Broadside to the plane of the halo