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

2. - G0B08

What should be done before climbing a tower that supports electrically powered devices?

Select	Answer
A	Unground the base of the tower
B	All these choices are correct
C	Notify the electric company that a person will be working on the tower
D	Make sure all circuits that supply power to the tower are locked out and tagged

3. - G1A08

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

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

4. - G1B09

On what HF frequencies are automatically controlled beacons permitted?

Select	Answer
A	On any frequency if power is less than 1 watt
B	On any frequency if transmissions are in Morse code
C	28.20 MHz to 28.30 MHz
D	21.08 MHz to 21.09 MHz

5. - G1C05

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

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

6. - G1D12

When operating a station in South America by remote control over the internet from the US, what regulations apply?

Select	Answer
A	Those of both the remote station’s country and the FCC
B	Only those of the remote station’s country
C	Only those of the FCC
D	Those of the remote station’s country and the FCC’s third-party regulations

7. - G1E12

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

Select	Answer
A	Under no circumstances except for emergencies
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	Only when the message is intended for licensed radio amateurs

8. - G2A03

Which mode is most commonly used for SSB voice communications in the VHF and UHF bands?

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

9. - G2B01

Which of the following is true concerning access to frequencies?

Select	Answer
A	Except during emergencies, no amateur station has priority access to any frequency
B	Contest operations should yield to non-contest use of frequencies
C	QSOs in progress have priority
D	Nets have priority

10. - G2C11

What does the Q signal “QRV” mean?

Select	Answer
A	I am ready to receive
B	There is interference on the frequency
C	I am quitting for the day
D	You are sending too fast

11. - G2D06

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

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

12. - G2E11

What is the primary purpose of an Amateur Radio Emergency Data Network (AREDN) mesh network?

Select	Answer
A	To provide real time propagation data by monitoring amateur radio transmissions worldwide
B	To provide DX spotting reports to aid contesters and DXers
C	To provide high-speed data services during an emergency or community event
D	To provide FM repeater coverage in remote areas

13. - G3A06

What is a geomagnetic storm?

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

14. - G3B03

Which frequency will have the least attenuation for long-distance skip propagation?

Select	Answer
A	Just above the critical frequency
B	Just below the critical frequency
C	Just above the LUF
D	Just below the MUF

15. - G3C04

What does the term “critical angle” mean, as applied to radio wave propagation?

Select	Answer
A	The highest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions
B	The short path azimuth of a distant station
C	The long path azimuth of a distant station
D	The lowest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions

16. - G4A11

Why should the ALC system be inactive when transmitting AFSK data signals?

Select	Answer
A	ALC will invert the modulation of the AFSK mode
B	The ALC action distorts the signal
C	All these choices are correct
D	When using digital modes, too much ALC activity can cause the transmitter to overheat

17. - G4B09

When is an analog multimeter preferred to a digital multimeter?

Select	Answer
A	When measuring the frequency of an oscillator
B	When testing logic circuits
C	When high precision is desired
D	When adjusting circuits for maximum or minimum values

18. - G4C04

What sound is heard from an audio device experiencing RF interference from a CW transmitter?

Select	Answer
A	A chirpy CW signal
B	Severely distorted audio
C	On-and-off humming or clicking
D	A CW signal at a nearly pure audio frequency

19. - G4D04

What does an S meter measure?

Select	Answer
A	Received signal strength
B	Carrier suppression
C	Transmitter power output
D	Impedance

20. - G4E07

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

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

21. - G5A02

What is reactance?

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

22. - G5B03

How many watts of electrical power are consumed if 400 VDC is supplied to an 800-ohm load?

Select	Answer
A	3200 watts
B	0.5 watts
C	400 watts
D	200 watts

23. - G5C04

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

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

24. - G6A09

Which of the following describes MOSFET construction?

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

25. - G6B10

How does a ferrite bead or core reduce common-mode RF current on the shield of a coaxial cable?

Select	Answer
A	By creating an out-of-phase current to cancel the common-mode current
B	It converts common-mode current to differential mode current
C	By creating an impedance in the current’s path
D	Ferrites expel magnetic fields

26. - G7A09

Which symbol in figure G7-1 represents a field effect transistor?

Select	Answer
A	Symbol 1
B	Symbol 5
C	Symbol 2
D	Symbol 4

27. - G7B02

Which of these classes of amplifiers has the highest efficiency?

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

28. - G7C10

What is an advantage of using I-Q modulation with software-defined radios (SDRs)?

Select	Answer
A	Automatic conversion of the signal from digital to analog
B	Minimum detectible signal level is reduced
C	The need for high resolution analog-to-digital converters is eliminated
D	All types of modulation can be created with appropriate processing

29. - G8A05

What type of modulation varies the instantaneous power level of the RF signal?

Select	Answer
A	Frequency modulation
B	Power modulation
C	Amplitude modulation
D	Phase modulation

30. - G8B07

What is the frequency deviation for a 12.21 MHz reactance modulated oscillator in a 5 kHz deviation, 146.52 MHz FM phone transmitter?

Select	Answer
A	60 kHz
B	416.7 Hz
C	5 kHz
D	101.75 Hz

31. - G8C08

Which of the following statements is true about PSK31?

Select	Answer
A	Upper case letters use longer Varicode bit sequences and thus slow down transmission
B	Error correction is used to ensure accurate message reception
C	Higher power is needed as compared to RTTY for similar error rates
D	Upper case letters are sent with more power

32. - G9A07

What must be done to prevent standing waves on a feed line connected to an antenna?

Select	Answer
A	The feed line must be an odd number of electrical quarter wavelengths long
B	The antenna feed point must be at DC ground potential
C	The antenna feed point impedance must be matched to the characteristic impedance of the feed line
D	The feed line must be an even number of physical half wavelengths long

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

34. - G9C08

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

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

35. - G9D02

What is the feed point impedance of an end-fed half-wave antenna?

Select	Answer
A	Approximately 300 ohms
B	Very low
C	Approximately 50 ohms
D	Very high

Figure G7-1