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

2. - G0B07

Which of these choices should be observed when climbing a tower using a safety harness?

Select	Answer
A	Ensure that all heavy tools are securely fastened to the harness
B	Always hold on to the tower with one hand
C	All these choices are correct
D	Confirm that the harness is rated for the weight of the climber and that it is within its allowable service life

3. - G1A04

Which of the following amateur bands is restricted to communication only on specific channels, rather than frequency ranges?

Select	Answer
A	60 meters
B	12 meters
C	30 meters
D	11 meters

4. - G1B04

Which of the following transmissions is permitted for all amateur stations?

Select	Answer
A	Automatic retransmission of other amateur signals by any amateur station
B	Occasional retransmission of weather and propagation forecast information from US government stations
C	Unidentified transmissions of less than 10 seconds duration for test purposes only
D	Encrypted messages, if not intended to facilitate a criminal act

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	1000 watts PEP output
C	100 watts PEP output
D	1500 watts PEP output

6. - G1D07

Volunteer Examiners are accredited by what organization?

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

7. - G1E12

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

Select	Answer
A	Under no circumstances except for emergencies
B	Under any circumstances in which third party messages are permitted by FCC rules
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. - G2A04

Which mode is most commonly used for voice communications on the 17- and 12-meter bands?

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

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

10. - G2C09

What does the Q signal “QSL” mean?

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

11. - G2D06

How is a directional antenna pointed when making a “long-path” contact with another station?

Select	Answer
A	Along the gray line
B	Toward the rising sun
C	Toward the north
D	180 degrees from the station’s short-path heading

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	The mark and space frequencies may be reversed
C	You may have selected the wrong baud rate
D	All these choices are correct

13. - G3A11

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

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

14. - G3B05

How does the ionosphere affect radio waves with frequencies below the MUF and above the LUF?

Select	Answer
A	They are refracted back to Earth
B	They are amplified by interaction with the ionosphere
C	They are refracted and trapped in the ionosphere to circle Earth
D	They pass through the ionosphere

15. - G3C06

What is a characteristic of HF scatter?

Select	Answer
A	Phone signals have high intelligibility
B	Signals have a fluttering sound
C	Scatter propagation occurs only at night
D	There are very large, sudden swings in signal strength

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	It may be possible to reduce or eliminate interference from other signals
C	Accidental out-of-band operation can be prevented
D	More stations can be accommodated within a given signal passband

17. - G4B07

What signals are used to conduct a two-tone test?

Select	Answer
A	Two swept frequency tones
B	Two non-harmonically related audio signals
C	Two audio signals of the same frequency shifted 90 degrees
D	Two audio frequency range square wave signals of equal amplitude

18. - G4C11

What technique helps to minimize RF “hot spots” in an amateur station?

Select	Answer
A	Placing low-pass filters on all feed lines
B	Using surge suppressor power outlets
C	Building all equipment in a metal enclosure
D	Bonding all equipment enclosures together

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 10 times less powerful
C	It is 100 times more powerful
D	It is 20 times less powerful

20. - G4E07

Which of the following may cause receive interference to an HF transceiver installed in a vehicle?

Select	Answer
A	All these choices are correct
B	The fuel delivery system
C	The battery charging system
D	The control computers

21. - G5A10

Which of the following devices can be used for impedance matching at radio frequencies?

Select	Answer
A	A length of transmission line
B	All these choices are correct
C	A transformer
D	A Pi-network

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 61 milliwatts
B	Approximately 61 watts
C	Approximately 11 milliwatts
D	Approximately 11 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	150 ohms
D	75 ohms

24. - G6A03

What is the approximate forward threshold voltage of a germanium diode?

Select	Answer
A	0.7 volts
B	0.1 volt
C	1.0 volts
D	0.3 volts

25. - G6B06

What kind of device is an integrated circuit operational amplifier?

Select	Answer
A	Programmable Logic
B	MMIC
C	Analog
D	Digital

26. - G7A08

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

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

27. - G7B04

In a Class A amplifier, what percentage of the time does the amplifying device conduct?

Select	Answer
A	More than 50% but less than 100%
B	100%
C	50%
D	Less than 50%

28. - G7C07

What term specifies a filter’s attenuation inside its passband?

Select	Answer
A	Q
B	Ultimate rejection
C	Insertion loss
D	Return loss

29. - G8A09

What type of modulation is used by FT8?

Select	Answer
A	8-bit direct sequence spread spectrum
B	8-tone frequency shift keying
C	Vestigial sideband
D	Amplitude compressed AM

30. - G8B11

What combination of a mixer’s Local Oscillator (LO) and RF input frequencies is found in the output?

Select	Answer
A	The average
B	The sum and difference
C	The ratio
D	The arithmetic product

31. - G8C12

Which type of code is used for sending characters in a PSK31 signal?

Select	Answer
A	Volumetric
B	Viterbi
C	Varicode
D	Binary

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. - G9B08

How does the feed point impedance of a 1/2 wave dipole change as the feed point is moved from the center toward the ends?

Select	Answer
A	It steadily decreases
B	It is unaffected by the location of the feed point
C	It peaks at about 1/8 wavelength from the end
D	It steadily increases

34. - G9C12

Which of the following is a characteristic of using a gamma match with a Yagi antenna?

Select	Answer
A	It is useful for matching multiband antennas
B	All these choices are correct
C	It does not require the driven element to be insulated from the boom
D	It does not require any inductors or capacitors

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