US Amateur Radio - General (Element 3, 2023-2027) Practice Test

Anonymous User

US Amateur Radio - General (Element 3, 2023-2027) Practice Test

Logging in (or registering) will help the system to select questions that you need to focus on.

1. - G0A01

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

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

2. - G0B12

What is the purpose of a power supply interlock?

Select	Answer
A	To ensure that dangerous voltages are removed if the cabinet is opened
B	To prevent unauthorized changes to the circuit that would void the manufacturer’s warranty
C	To shut down the unit if it becomes too hot
D	To shut off the power supply if too much voltage is produced

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	11 meters
C	30 meters
D	12 meters

4. - G1B04

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

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

5. - G1C01

What is the maximum transmitter power an amateur station may use on 10.140 MHz?

Select	Answer
A	2000 watts PEP output
B	200 watts PEP output
C	1000 watts PEP output
D	1500 watts PEP output

6. - G1D04

Who must observe the administration of a Technician class license examination?

Select	Answer
A	At least three Volunteer Examiners of General class or higher
B	At least two Volunteer Examiners of Technician class or higher
C	At least three Volunteer Examiners of Technician class
D	At least two Volunteer Examiners of General class or higher

7. - G1E11

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

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

8. - G2A09

Why do most amateur stations use lower sideband on the 160-, 75-, and 40-meter bands?

Select	Answer
A	Lower sideband is more efficient than upper sideband at these frequencies
B	Lower sideband is the only sideband legal on these frequency bands
C	It is commonly accepted amateur practice
D	Because it is fully compatible with an AM detector

9. - G2B03

What is good amateur practice if propagation changes during a contact creating interference from other stations using the frequency?

Select	Answer
A	Advise the interfering stations that you are on the frequency and that you have priority
B	Switch to the opposite sideband
C	Decrease power and continue to transmit
D	Attempt to resolve the interference problem with the other stations in a mutually acceptable manner

10. - G2C05

What is the best speed to use when answering a CQ in Morse code?

Select	Answer
A	The fastest speed at which you are comfortable copying, but no faster than the CQ
B	At the standard calling speed of 10 wpm
C	At the standard calling speed of 5 wpm
D	The fastest speed at which you are comfortable copying, but no slower than the CQ

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	180 degrees from the station’s short-path heading
C	Toward the north
D	Along the gray line

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

13. - G3A07

At what point in the solar cycle does the 20-meter band usually support worldwide propagation during daylight hours?

Select	Answer
A	At any point
B	At the summer solstice
C	Only at the minimum point
D	Only at the maximum point

14. - G3B03

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

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

15. - G3C07

What makes HF scatter signals often sound distorted?

Select	Answer
A	The E region is not present
B	The ionospheric region involved is unstable
C	Ground waves are absorbing much of the signal
D	Energy is scattered into the skip zone through several different paths

16. - G4A13

What is the purpose of using a receive attenuator?

Select	Answer
A	To reduce the transmitter power when driving a linear amplifier
B	To reduce power consumption when operating from batteries
C	To reduce excessive audio level on strong signals
D	To prevent receiver overload from strong incoming signals

17. - G4B12

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

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

18. - G4C12

Why must all metal enclosures of station equipment be grounded?

Select	Answer
A	It ensures that the neutral wire is grounded
B	It ensures that hazardous voltages cannot appear on the chassis
C	It prevents a blown fuse in the event of an internal short circuit
D	It prevents signal overload

19. - G4D06

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

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

20. - G4E11

What precaution should be taken when connecting a solar panel to a lithium iron phosphate battery?

Select	Answer
A	A series resistor must be in place
B	The solar panel must have a charge controller
C	Ground the solar panel outer metal framework
D	Ensure the battery is placed terminals-up

21. - G5A12

What occurs in an LC circuit at resonance?

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

22. - G5B03

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

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

23. - G5C10

What is the inductance of three 10-millihenry inductors connected in parallel?

Select	Answer
A	3.3 henries
B	3.3 millihenries
C	0.30 henries
D	30 millihenries

24. - G6A07

What are the operating points for a bipolar transistor used as a switch?

Select	Answer
A	The active region (between cutoff and saturation)
B	Peak and valley current points
C	Saturation and cutoff
D	Enhancement and depletion modes

25. - G6B01

What determines the performance of a ferrite core at different frequencies?

Select	Answer
A	Its thickness
B	Its conductivity
C	The composition, or “mix,” of materials used
D	The ratio of outer diameter to inner diameter

26. - G7A05

What portion of the AC cycle is converted to DC by a half-wave rectifier?

Select	Answer
A	90 degrees
B	360 degrees
C	180 degrees
D	270 degrees

27. - G7B01

What is the purpose of neutralizing an amplifier?

Select	Answer
A	To eliminate self-oscillations
B	To keep the carrier on frequency
C	To cut off the final amplifier during standby periods
D	To limit the modulation index

28. - G7C03

What is one reason to use an impedance matching transformer at a transmitter output?

Select	Answer
A	To reduce power supply ripple
B	To present the desired impedance to the transmitter and feed line
C	To minimize radiation resistance
D	To minimize transmitter power output

29. - G8A09

What type of modulation is used by FT8?

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

30. - G8B03

What is another term for the mixing of two RF signals?

Select	Answer
A	Phase inversion
B	Synthesizing
C	Frequency inversion
D	Heterodyning

31. - G8C12

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

Select	Answer
A	Viterbi
B	Varicode
C	Volumetric
D	Binary

32. - G9A03

What is the nominal characteristic impedance of “window line” transmission line?

Select	Answer
A	50 ohms
B	75 ohms
C	100 ohms
D	450 ohms

33. - G9B07

How does the feed point impedance of a horizontal 1/2 wave dipole antenna change as the antenna height is reduced to 1/10 wavelength above ground?

Select	Answer
A	It steadily increases
B	It is unaffected by the height above ground
C	It steadily decreases
D	It peaks at about 1/8 wavelength above ground

34. - G9C02

What is the approximate length of the driven element of a Yagi antenna?

Select	Answer
A	1/4 wavelength
B	1 wavelength
C	1/2 wavelength
D	3/4 wavelength

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	Opposite the feed point
C	Omnidirectional in the plane of the halo
D	Broadside to the plane of the halo