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. - G0A10

What should be done if evaluation shows that a neighbor might experience more than the allowable limit of RF exposure from the main lobe of a directional antenna?

Select	Answer
A	Take precautions to ensure that the antenna cannot be pointed in their direction when they are present
B	Use an antenna with a higher front-to-back ratio
C	All these choices are correct
D	Change to a non-polarized antenna with higher gain

2. - G0B01

Which wire or wires in a four-conductor 240 VAC circuit should be attached to fuses or circuit breakers?

Select	Answer
A	Only the neutral wire
B	Only the ground wire
C	All wires
D	Only the hot wires

3. - G1A03

On which of the following bands is image transmission prohibited?

Select	Answer
A	160 meters
B	12 meters
C	30 meters
D	20 meters

4. - G1B09

On what HF frequencies are automatically controlled beacons permitted?

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

5. - G1C06

What is the limit for transmitter power on the 1.8 MHz band?

Select	Answer
A	1000 watts PEP output
B	200 watts PEP output
C	1500 watts PEP output
D	1200 watts PEP output

6. - G1D09

How long is a Certificate of Successful Completion of Examination (CSCE) valid for exam element credit?

Select	Answer
A	365 days
B	30 days
C	For as long as your current license is valid
D	180 days

7. - G1E09

Under what circumstances are messages that are sent via digital modes exempt from Part 97 third-party rules that apply to other modes of communication?

Select	Answer
A	When messages are not encrypted
B	When under automatic control
C	Under no circumstances
D	When messages are encrypted

8. - G2A09

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

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

9. - G2B05

When selecting an SSB transmitting frequency, what minimum separation should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	150 Hz to 500 Hz
B	2 kHz to 3 kHz
C	5 Hz to 50 Hz
D	Approximately 6 kHz

10. - G2C06

What does the term “zero beat” mean in CW operation?

Select	Answer
A	Matching the speed of the transmitting station
B	Operating split to avoid interference on frequency
C	Matching the transmit frequency to the frequency of a received signal
D	Sending without error

11. - G2D07

Which of the following are examples of the NATO Phonetic Alphabet?

Select	Answer
A	Alpha, Bravo, Charlie, Delta
B	Adam, Boy, Charles, David
C	Able, Baker, Charlie, Dog
D	America, Boston, Canada, Denmark

12. - G2E13

What is another name for a Winlink Remote Message Server?

Select	Answer
A	Terminal Node Controller
B	RJ-45
C	Gateway
D	Printer/Server

13. - G3A06

What is a geomagnetic storm?

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

14. - G3B08

What does MUF stand for?

Select	Answer
A	The Maximum Usable Frequency for communications between two points
B	The Minimum Usable Frequency during a 24-hour period
C	The Maximum Usable Frequency during a 24-hour period
D	The Minimum Usable Frequency for communications between two points

15. - G3C04

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

Select	Answer
A	The long path azimuth of a distant station
B	The short path azimuth of a distant station
C	The lowest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions
D	The highest 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	The ALC action distorts the signal
B	All these choices are correct
C	ALC will invert the modulation of the AFSK mode
D	When using digital modes, too much ALC activity can cause the transmitter to overheat

17. - G4B12

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

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

18. - G4C12

Why must all metal enclosures of station equipment be grounded?

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

19. - G4D09

What frequency range is occupied by a 3 kHz USB signal with the displayed carrier frequency set to 14.347 MHz?

Select	Answer
A	14.347 MHz to 14.647 MHz
B	14.3455 MHz to 14.3485 MHz
C	14.344 MHz to 14.347 MHz
D	14.347 MHz to 14.350 MHz

20. - G4E03

Which of the following direct, fused power connections would be the best for a 100-watt HF mobile installation?

Select	Answer
A	To the battery using insulated heavy duty balanced transmission line
B	To the alternator or generator using insulated heavy duty balanced transmission line
C	To the alternator or generator using heavy-gauge wire
D	To the battery using heavy-gauge wire

21. - G5A11

What letter is used to represent reactance?

Select	Answer
A	Y
B	B
C	Z
D	X

22. - G5B07

What value of an AC signal produces the same power dissipation in a resistor as a DC voltage of the same value?

Select	Answer
A	The reciprocal of the RMS value
B	The RMS value
C	The peak value
D	The peak-to-peak value

23. - G5C13

Which of the following components should be added to a capacitor to increase the capacitance?

Select	Answer
A	An inductor in parallel
B	A capacitor in parallel
C	An inductor in series
D	A capacitor in series

24. - G6A04

Which of the following is characteristic of an electrolytic capacitor?

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

25. - G6B12

Which of these connector types is commonly used for low frequency or dc signal connections to a transceiver?

Select	Answer
A	RCA Phono
B	BNC
C	PL-259
D	Type N

26. - G7A01

What is the function of a power supply bleeder resistor?

Select	Answer
A	It removes shock hazards from the induction coils
B	It discharges the filter capacitors when power is removed
C	It acts as a fuse for excess voltage
D	It eliminates ground loop current

27. - G7B06

What is a shift register?

Select	Answer
A	An array of operational amplifiers used for tri-state arithmetic operations
B	An analog mixer
C	A digital mixer
D	A clocked array of circuits that passes data in steps along the array

28. - G7C10

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

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

29. - G8A13

What is a link budget?

Select	Answer
A	The sum of transmit power and antenna gains minus system losses as seen at the receiver
B	The difference between transmit power and receiver sensitivity
C	The financial costs associated with operating a radio link
D	The sum of antenna gains minus system losses

30. - G8B03

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

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

31. - G8C08

Which of the following statements is true about PSK31?

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

32. - G9A07

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

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

33. - G9B05

How does antenna height affect the azimuthal radiation pattern of a horizontal dipole HF antenna at elevation angles higher than about 45 degrees?

Select	Answer
A	If the antenna is less than 1/2 wavelength high, the azimuthal pattern is almost omnidirectional
B	Antenna height has no effect on the pattern
C	If the antenna is less than 1/2 wavelength high, radiation off the ends of the wire is eliminated
D	If the antenna is too high, the pattern becomes unpredictable

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

35. - G9D12

What is the common name of a dipole with a single central support?

Select	Answer
A	Lazy H
B	Inverted V
C	Inverted L
D	Sloper