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. - G0A01

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

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

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	All these choices are correct
C	The generator should be operated in a well-ventilated area
D	The generator must be insulated from ground

3. - G1A03

On which of the following bands is image transmission prohibited?

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

4. - G1B01

What is the maximum height above ground for an antenna structure not near a public use airport without requiring notification to the FAA and registration with the FCC?

Select	Answer
A	50 feet
B	100 feet
C	200 feet
D	250 feet

5. - G1C08

What is the maximum symbol rate permitted for RTTY or data emission transmitted at frequencies below 28 MHz?

Select	Answer
A	300 baud
B	19.6 kilobaud
C	56 kilobaud
D	1200 baud

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 three Volunteer Examiners of Technician class
C	At least two Volunteer Examiners of Technician class or higher
D	At least two Volunteer Examiners of General class or higher

7. - G1E02

When may a 10-meter repeater retransmit the 2-meter signal from a station that has a Technician class control operator?

Select	Answer
A	Only during an FCC-declared general state of communications emergency
B	Only if the station on 10-meters is operating under a Special Temporary Authorization allowing such retransmission
C	Only if the 10-meter repeater control operator holds at least a General class license
D	Under no circumstances

8. - G2A01

Which mode is most commonly used for voice communications on frequencies of 14 MHz or higher?

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

9. - G2B11

How often may RACES training drills and tests be routinely conducted without special authorization?

Select	Answer
A	No more than 1 hour per month
B	No more than 2 hours per week
C	No more than 1 hour per week
D	No more than 2 hours per month

10. - G2C07

When sending CW, what does a “C” mean when added to the RST report?

Select	Answer
A	Chirpy or unstable signal
B	Report was read from an S meter rather than estimated
C	Key clicks
D	100 percent copy

11. - G2D02

Which of the following are objectives of the Volunteer Monitor Program?

Select	Answer
A	To provide emergency and public safety communications
B	To conduct efficient and orderly amateur licensing examinations
C	To coordinate repeaters for efficient and orderly spectrum usage
D	To encourage amateur radio operators to self-regulate and comply with the rules

12. - G2E03

What symptoms may result from other signals interfering with a PACTOR or VARA transmission?

Select	Answer
A	Frequent retries or timeouts
B	Long pauses in message transmission
C	Failure to establish a connection between stations
D	All these choices are correct

13. - G3A12

What does the K-index measure?

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

14. - G3B08

What does MUF stand for?

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

15. - G3C05

Why is long-distance communication on the 40-, 60-, 80-, and 160-meter bands more difficult during the day?

Select	Answer
A	The D region absorbs signals at these frequencies during daylight hours
B	The F region is unstable during daylight hours
C	The F region absorbs signals at these frequencies during daylight hours
D	The E region is unstable during daylight hours

16. - G4A08

What is the correct adjustment for the LOAD or COUPLING control of a vacuum tube RF power amplifier?

Select	Answer
A	Desired power output without exceeding maximum allowable plate current
B	Minimum SWR on the antenna
C	Highest plate voltage while minimizing grid current
D	Minimum plate current without exceeding maximum allowable grid current

17. - G4B04

What signal source is connected to the vertical input of an oscilloscope when checking the RF envelope pattern of a transmitted signal?

Select	Answer
A	The attenuated RF output of the transmitter
B	An external RF oscillator
C	The local oscillator of the transmitter
D	The transmitter balanced mixer output

18. - G4C10

What could be a symptom caused by a ground loop in your station’s audio connections?

Select	Answer
A	An item of station equipment starts to draw excessive amounts of current
B	The SWR reading for one or more antennas is suddenly very high
C	You receive reports of “hum” on your station’s transmitted signal
D	You receive reports of harmonic interference from your station

19. - G4D06

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

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

20. - G4E05

Which of the following most limits an HF mobile installation?

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

21. - G5A12

What occurs in an LC circuit at resonance?

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

22. - G5B14

What is the output PEP of 500 volts peak-to-peak across a 50-ohm load?

Select	Answer
A	2500 watts
B	8.75 watts
C	5000 watts
D	625 watts

23. - G5C08

What is the equivalent capacitance of two 5.0-nanofarad capacitors and one 750-picofarad capacitor connected in parallel?

Select	Answer
A	10.750 nanofarads
B	3,583 picofarads
C	576.9 nanofarads
D	1,733 picofarads

24. - G6A08

Which of the following is characteristic of low voltage ceramic capacitors?

Select	Answer
A	High capacitance for given volume
B	Comparatively low cost
C	Tight tolerance
D	High stability

25. - G6B06

What kind of device is an integrated circuit operational amplifier?

Select	Answer
A	Digital
B	Analog
C	Programmable Logic
D	MMIC

26. - G7A08

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

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

27. - G7B06

What is a shift register?

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

28. - G7C07

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

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

29. - G8A06

Which of the following is characteristic of QPSK31?

Select	Answer
A	Its bandwidth is approximately the same as BPSK31
B	Its encoding provides error correction
C	It is sideband sensitive
D	All these choices are correct

30. - G8B04

What is the stage in a VHF FM transmitter that generates a harmonic of a lower frequency signal to reach the desired operating frequency?

Select	Answer
A	Mixer
B	Multiplier
C	Balanced converter
D	Reactance modulator

31. - G8C08

Which of the following statements is true about PSK31?

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

32. - G9A08

If the SWR on an antenna feed line is 5:1, and a matching network at the transmitter end of the feed line is adjusted to present a 1:1 SWR to the transmitter, what is the resulting SWR on the feed line?

Select	Answer
A	Between 1:1 and 5:1 depending on the characteristic impedance of the line
B	5:1
C	Between 1:1 and 5:1 depending on the reflected power at the transmitter
D	1:1

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 steadily decreases
C	It peaks at about 1/8 wavelength above ground
D	It is unaffected by the height above ground

34. - G9C10

Which of the following can be adjusted to optimize forward gain, front-to-back ratio, or SWR bandwidth of a Yagi antenna?

Select	Answer
A	The number of elements on the boom
B	The physical length of the boom
C	All these choices are correct
D	The spacing of each element along the boom

35. - G9D05

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

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