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. - G0A11

What precaution should be taken if you install an indoor transmitting antenna?

Select	Answer
A	Make sure the antenna is properly shielded
B	Make sure that MPE limits are not exceeded in occupied areas
C	Locate the antenna close to your operating position to minimize feed-line radiation
D	Position the antenna along the edge of a wall to reduce parasitic radiation

2. - G0B07

Which of these choices should be observed when climbing a tower using a safety harness?

Select	Answer
A	All these choices are correct
B	Ensure that all heavy tools are securely fastened to the harness
C	Always hold on to the tower with one hand
D	Confirm that the harness is rated for the weight of the climber and that it is within its allowable service life

3. - G1A07

On which amateur frequencies in the 10-meter band may stations with a General class control operator transmit CW emissions?

Select	Answer
A	28.000 MHz to 28.025 MHz only
B	28.000 MHz to 28.300 MHz only
C	28.025 MHz to 28.300 MHz only
D	The entire band

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	On any frequency if transmissions are in Morse code
D	21.08 MHz to 21.09 MHz

5. - G1C07

What must be done before using a new digital protocol on the air?

Select	Answer
A	Submit a rule-making proposal to the FCC describing the codes and methods of the technique
B	Publicly document the technical characteristics of the protocol
C	Obtain an experimental license from the FCC
D	Type-certify equipment to FCC standards

6. - G1D07

Volunteer Examiners are accredited by what organization?

Select	Answer
A	The Universal Licensing System
B	The Federal Communications Commission
C	The Wireless Telecommunications Bureau
D	A Volunteer Examiner Coordinator

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

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

9. - G2B10

Which of the following is good amateur practice for net management?

Select	Answer
A	Transmit the full net roster at the beginning of every session
B	Have a backup frequency in case of interference or poor conditions
C	All these choices are correct
D	Always use multiple sets of phonetics during check-in

10. - G2C09

What does the Q signal “QSL” mean?

Select	Answer
A	Send slower
B	We have worked before
C	We have already confirmed the contact
D	I have received and understood

11. - G2D10

What is QRP operation?

Select	Answer
A	Traffic relay procedure net operation
B	Remote piloted model control
C	Transmission using Quick Response Protocol
D	Low-power transmit operation

12. - G2E06

What is the most common frequency shift for RTTY emissions in the amateur HF bands?

Select	Answer
A	425 Hz
B	170 Hz
C	85 Hz
D	850 Hz

13. - G3A03

Approximately how long does it take the increased ultraviolet and X-ray radiation from a solar flare to affect radio propagation on Earth?

Select	Answer
A	1 to 2 hours
B	28 days
C	8 minutes
D	20 to 40 hours

14. - G3B02

What factors affect the MUF?

Select	Answer
A	Time of day and season
B	Solar radiation and ionospheric disturbances
C	All these choices are correct
D	Path distance and location

15. - G3C08

Why are HF scatter signals in the skip zone usually weak?

Select	Answer
A	Only a small part of the signal energy is scattered into the skip zone
B	Signals are scattered from the magnetosphere, which is not a good reflector
C	Propagation is via ground waves, which absorb most of the signal energy
D	Propagation is via ducts in the F region, which absorb most of the energy

16. - G4A10

What is the function of an electronic keyer?

Select	Answer
A	To allow time for switching the antenna from the receiver to the transmitter
B	Automatic generation of dots and dashes for CW operation
C	Automatic transmit/receive switching
D	Computer interface for PSK and RTTY operation

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

18. - G4C09

How can the effects of ground loops be minimized?

Select	Answer
A	Connect the AC neutral conductor to the ground wire
B	Avoid using lock washers and star washers when making ground connections
C	Connect all ground conductors in series
D	Bond equipment enclosures together

19. - G4D05

How does a signal that reads 20 dB over S9 compare to one that reads S9 on a receiver, assuming a properly calibrated S meter?

Select	Answer
A	It is 100 times more powerful
B	It is 20 times more powerful
C	It is 10 times less powerful
D	It is 20 times less powerful

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	Efficiency of the electrically short antenna
D	FCC rules limiting mobile output power on the 75-meter band

21. - G5A08

What is impedance?

Select	Answer
A	The product of current and voltage
B	The ratio of current to voltage
C	The ratio of voltage to current
D	The product of current and reactance

22. - G5B11

What is the ratio of PEP to average power for an unmodulated carrier?

Select	Answer
A	0.707
B	1.414
C	1.00
D	2.00

23. - G5C06

What is the voltage output of a transformer with a 500-turn primary and a 1500-turn secondary when 120 VAC is applied to the primary?

Select	Answer
A	25.5 volts
B	360 volts
C	40 volts
D	120 volts

24. - G6A12

What is the primary purpose of a screen grid in a vacuum tube?

Select	Answer
A	To increase the control grid resistance
B	To reduce grid-to-plate capacitance
C	To increase efficiency
D	To decrease plate resistance

25. - G6B12

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

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

26. - G7A06

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

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

27. - G7B06

What is a shift register?

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

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. - G8A05

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

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

30. - G8B06

What is the total bandwidth of an FM phone transmission having 5 kHz deviation and 3 kHz modulating frequency?

Select	Answer
A	5 kHz
B	8 kHz
C	16 kHz
D	3 kHz

31. - G8C07

Which of the following narrow-band digital modes can receive signals with very low signal-to-noise ratios?

Select	Answer
A	AMTOR
B	MFSK32
C	FT8
D	MSK144

32. - G9A01

Which of the following factors determine the characteristic impedance of a parallel conductor feed line?

Select	Answer
A	The radius of the conductors and the frequency of the signal
B	The distance between the centers of the conductors and the radius of the conductors
C	The frequency of the signal and the length of the line
D	The distance between the centers of the conductors and the length of the line

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

34. - G9C12

Which of the following is a characteristic of using a gamma match with a Yagi antenna?

Select	Answer
A	It does not require any inductors or capacitors
B	It is useful for matching multiband antennas
C	It does not require the driven element to be insulated from the boom
D	All these choices are correct

35. - G9D04

What is the primary function of antenna traps?

Select	Answer
A	To enable multiband operation
B	To notch spurious frequencies
C	To provide balanced feed point impedance
D	To prevent out-of-band operation