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. - G0A07

What is the effect of modulation duty cycle on RF exposure?

Select	Answer
A	High duty cycle transmitters are exempt from RF exposure requirements
B	A higher duty cycle permits greater power levels to be transmitted
C	Low duty cycle transmitters are exempt from RF exposure evaluation requirements
D	A lower duty cycle permits greater power levels to be transmitted

2. - G0B10

Which of the following is a danger from lead-tin solder?

Select	Answer
A	High voltages can cause lead-tin solder to disintegrate suddenly
B	RF energy can convert the lead into a poisonous gas
C	Lead can contaminate food if hands are not washed carefully after handling the solder
D	Tin in the solder can “cold flow,” causing shorts in the circuit

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

4. - G1B03

Which of the following is a purpose of a beacon station as identified in the FCC rules?

Select	Answer
A	Automatic identification of repeaters
B	All these choices are correct
C	Transmission of bulletins of general interest to amateur radio licensees
D	Observation of propagation and reception

5. - G1C07

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

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

6. - G1D05

When operating a US station by remote control from outside the country, what license is required of the control operator?

Select	Answer
A	A US operator/primary station license
B	Only an appropriate US operator/primary license and a special remote station permit from the FCC
C	Only a license from the foreign country, as long as the call sign includes identification of portable operation in the US
D	A license from the foreign country and a special remote station permit from the FCC

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 10-meter repeater control operator holds at least a General class license
C	Under no circumstances
D	Only if the station on 10-meters is operating under a Special Temporary Authorization allowing such retransmission

8. - G2A04

Which mode is most commonly used for voice communications on the 17- and 12-meter bands?

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

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. - G2C01

Which of the following describes full break-in CW operation (QSK)?

Select	Answer
A	Transmitting stations can receive between code characters and elements
B	Automatic keyers, instead of hand keys, are used to send Morse code
C	Breaking stations send the Morse code prosign “BK”
D	An operator must activate a manual send/receive switch before and after every transmission

11. - G2D01

What is the Volunteer Monitor Program?

Select	Answer
A	Amateur volunteers who are formally enlisted to monitor the airwaves for rules violations
B	Amateur volunteers who conduct frequency coordination for amateur VHF repeaters
C	Amateur volunteers who conduct amateur licensing examinations
D	Amateur volunteers who use their station equipment to help civil defense organizations in times of emergency

12. - G2E05

What is the standard sideband for JT65, JT9, FT4, or FT8 digital signal when using AFSK?

Select	Answer
A	LSB
B	DSB
C	USB
D	SSB

13. - G3A14

How is long distance radio communication usually affected by the charged particles that reach Earth from solar coronal holes?

Select	Answer
A	HF communication is improved
B	HF communication is disturbed
C	VHF/UHF ducting is improved
D	VHF/UHF ducting is disturbed

14. - G3B12

Which of the following is typical of the lower HF frequencies during the summer?

Select	Answer
A	Poor propagation at any time of day
B	High levels of atmospheric noise or static
C	Heavy distortion on signals due to photon absorption
D	World-wide propagation during daylight hours

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. - G4A04

What is the effect on plate current of the correct setting of a vacuum-tube RF power amplifier’s TUNE control?

Select	Answer
A	No change will be observed
B	A pronounced peak
C	A slow, rhythmic oscillation
D	A pronounced dip

17. - G4B03

Which of the following is the best instrument to use for checking the keying waveform of a CW transmitter?

Select	Answer
A	A sidetone monitor
B	A field strength meter
C	An oscilloscope
D	A wavemeter

18. - G4C06

What is a possible effect of a resonant ground connection?

Select	Answer
A	A ground loop
B	Corrosion of the ground rod
C	High RF voltages on the enclosures of station equipment
D	Overheating of ground straps

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 8 times
D	Approximately 4 times

20. - G4E07

Which of the following may cause receive interference to an HF transceiver installed in a vehicle?

Select	Answer
A	The battery charging system
B	The control computers
C	The fuel delivery system
D	All these choices are correct

21. - G5A11

What letter is used to represent reactance?

Select	Answer
A	B
B	X
C	Z
D	Y

22. - G5B01

What dB change represents a factor of two increase or decrease in power?

Select	Answer
A	Approximately 6 dB
B	Approximately 9 dB
C	Approximately 2 dB
D	Approximately 3 dB

23. - G5C09

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

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

24. - G6A11

What happens when an inductor is operated above its self-resonant frequency?

Select	Answer
A	Its reactance increases
B	It becomes capacitive
C	Harmonics are generated
D	Catastrophic failure is likely

25. - G6B01

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

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

26. - G7A04

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

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

27. - G7B09

What determines the frequency of an LC oscillator?

Select	Answer
A	The inductance and capacitance in the tank circuit
B	The time delay of the lag circuit
C	The number of stages in the counter
D	The number of stages in the divider

28. - G7C04

How is a product detector used?

Select	Answer
A	Used in an FM receiver to filter out unwanted sidebands
B	Used in a single sideband receiver to extract the modulated signal
C	Used in test gear to detect spurious mixing products
D	Used in transmitter to perform frequency multiplication

29. - G8A12

What is QPSK modulation?

Select	Answer
A	Modulation using Fast Fourier Transforms to generate frequencies at the first, second, third, and fourth harmonics of the carrier frequency to improve noise immunity
B	Modulation using quasi-parallel to serial conversion to reduce bandwidth
C	Modulation in which digital data is transmitted using 0-, 90-, 180- and 270-degrees phase shift to represent pairs of bits
D	Modulation using quadra-pole sideband keying to generate spread spectrum signals

30. - G8B12

What process combines two signals in a non-linear circuit to produce unwanted spurious outputs?

Select	Answer
A	Intermodulation
B	Rolloff
C	Heterodyning
D	Detection

31. - G8C04

Which of the following describes Baudot code?

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

32. - G9A05

How does the attenuation of coaxial cable change with increasing frequency?

Select	Answer
A	Attenuation decreases
B	Attenuation increases
C	Attenuation is independent of frequency
D	Attenuation follows Marconi’s Law of Attenuation

33. - G9B03

Which of the following best describes the radiation pattern of a quarter-wave ground-plane vertical antenna?

Select	Answer
A	Hemispherical
B	Bi-directional in azimuth
C	Omnidirectional in azimuth
D	Isotropic

34. - G9C02

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

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

35. - G9D02

What is the feed point impedance of an end-fed half-wave antenna?

Select	Answer
A	Approximately 50 ohms
B	Very high
C	Very low
D	Approximately 300 ohms