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. - G0A04

What does “time averaging” mean when evaluating RF radiation exposure?

Select	Answer
A	The total RF exposure averaged over a certain period
B	The total time of the exposure
C	The average amount of power developed by the transmitter over a specific 24-hour period
D	The average time it takes RF radiation to have any long-term effect on the body

2. - G0B09

Which of the following is true of an emergency generator installation?

Select	Answer
A	Fuel should be stored near the generator for rapid refueling in case of an emergency
B	The generator must be insulated from ground
C	All these choices are correct
D	The generator should be operated in a well-ventilated area

3. - G1A02

On which of the following bands is phone operation prohibited?

Select	Answer
A	17 meters
B	12 meters
C	160 meters
D	30 meters

4. - G1B11

Who or what determines “good engineering and good amateur practice,” as applied to the operation of an amateur station in all respects not covered by the Part 97 rules?

Select	Answer
A	The IEEE
B	The FCC
C	The control operator
D	The ITU

5. - G1C01

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

Select	Answer
A	1500 watts PEP output
B	1000 watts PEP output
C	2000 watts PEP output
D	200 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 Technician class
B	At least two Volunteer Examiners of General class or higher
C	At least two Volunteer Examiners of Technician class or higher
D	At least three Volunteer Examiners of General class or higher

7. - G1E03

What is required to conduct communications with a digital station operating under automatic control outside the automatic control band segments?

Select	Answer
A	The interrogating transmission must be made by another automatically controlled station
B	The station initiating the contact must be under local or remote control
C	The control operator of the interrogating station must hold an Amateur Extra class license
D	No third-party traffic may be transmitted

8. - G2A06

Which of the following is an advantage of using single sideband, as compared to other analog voice modes on the HF amateur bands?

Select	Answer
A	Very high-fidelity voice modulation
B	Ease of tuning on receive and immunity to impulse noise
C	Less bandwidth used and greater power efficiency
D	Less subject to interference from atmospheric static crashes

9. - G2B07

Which of the following complies with commonly accepted amateur practice when choosing a frequency on which to initiate a call?

Select	Answer
A	All these choices are correct
B	Listen on the frequency for at least two minutes to be sure it is clear
C	Follow the voluntary band plan
D	Identify your station by transmitting your call sign at least 3 times

10. - G2C06

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

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

11. - G2D04

Which of the following describes an azimuthal projection map?

Select	Answer
A	A map that shows true bearings and distances from a specific location
B	A map that shows the number of degrees longitude that an amateur satellite appears to move westward at the equator with each orbit
C	A map that shows accurate land masses
D	A map that shows the angle at which an amateur satellite crosses the equator

12. - G2E01

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

Select	Answer
A	DSB
B	USB
C	CW
D	LSB

13. - G3A13

What does the A-index measure?

Select	Answer
A	The amount of polarization of the Sun’s electric field
B	The long-term stability of Earth’s geomagnetic field
C	The relative position of sunspots on the surface of the Sun
D	The solar radio flux at Boulder, Colorado

14. - G3B03

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

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

15. - G3C01

Which ionospheric region is closest to the surface of Earth?

Select	Answer
A	The F1 region
B	The E region
C	The F2 region
D	The D region

16. - G4A01

What is the purpose of the notch filter found on many HF transceivers?

Select	Answer
A	To reduce interference from carriers in the receiver passband
B	To remove interfering splatter generated by signals on adjacent frequencies
C	To eliminate receiver interference from impulse noise sources
D	To restrict the transmitter voice bandwidth

17. - G4B08

What transmitter performance parameter does a two-tone test analyze?

Select	Answer
A	Percentage of carrier phase shift
B	Linearity
C	Percentage of suppression of the carrier and undesired sideband for SSB
D	Percentage of frequency modulation

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

19. - G4D07

How much must the power output of a transmitter be raised to change the S meter reading on a distant receiver from S8 to S9?

Select	Answer
A	Approximately 2 times
B	Approximately 1.5 times
C	Approximately 4 times
D	Approximately 8 times

20. - G4E05

Which of the following most limits an HF mobile installation?

Select	Answer
A	“Picket fencing”
B	The wire gauge of the DC power line to the transceiver
C	FCC rules limiting mobile output power on the 75-meter band
D	Efficiency of the electrically short antenna

21. - G5A06

How does a capacitor react to AC?

Select	Answer
A	As the amplitude of the applied AC increases, the reactance increases
B	As the frequency of the applied AC increases, the reactance decreases
C	As the amplitude of the applied AC increases, the reactance decreases
D	As the frequency of the applied AC increases, the reactance increases

22. - G5B08

What is the peak-to-peak voltage of a sine wave with an RMS voltage of 120 volts?

Select	Answer
A	240.0 volts
B	169.7 volts
C	84.8 volts
D	339.4 volts

23. - G5C09

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

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

24. - G6A09

Which of the following describes MOSFET construction?

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

25. - G6B01

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

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

26. - G7A04

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

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

27. - G7B04

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

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

28. - G7C02

What output is produced by a balanced modulator?

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

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 modulation
B	Frequency conversion
C	Frequency convolution
D	Frequency transformation

30. - G8B11

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

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

31. - G8C04

Which of the following describes Baudot code?

Select	Answer
A	A code using error detection and correction
B	A 5-bit code with additional start and stop bits
C	A code using SELCAL and LISTEN
D	A 7-bit code with start, stop, and parity bits

32. - G9A10

What standing wave ratio results from connecting a 50-ohm feed line to a 10-ohm resistive load?

Select	Answer
A	1:2
B	5:1
C	1:5
D	2:1

33. - G9B01

What is a characteristic of a random-wire HF antenna connected directly to the transmitter?

Select	Answer
A	Station equipment may carry significant RF current
B	It must be longer than 1 wavelength
C	It is more effective on the lower HF bands than on the higher bands
D	It produces only vertically polarized radiation

34. - G9C05

What is the primary effect of increasing boom length and adding directors to a Yagi antenna?

Select	Answer
A	Gain increases
B	Resonant frequency is lower
C	Front-to-back ratio decreases
D	Beamwidth increases

35. - G9D05

What is an advantage of vertically stacking horizontally polarized Yagi antennas?

Select	Answer
A	It allows simultaneous vertical and horizontal polarization
B	It narrows the main lobe in azimuth
C	It narrows the main lobe in elevation
D	It allows quick selection of vertical or horizontal polarization