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. - G0A07

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

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

2. - G0B07

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

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

3. - G1A09

Which of the following frequencies is within the General class portion of the 15-meter band?

Select	Answer
A	14250 kHz
B	18155 kHz
C	21300 kHz
D	24900 kHz

4. - G1B03

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

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

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	1200 baud
C	19.6 kilobaud
D	56 kilobaud

6. - G1D04

Who must observe the administration of a Technician class license examination?

Select	Answer
A	At least two Volunteer Examiners of General class or higher
B	At least two Volunteer Examiners of Technician class or higher
C	At least three Volunteer Examiners of Technician class
D	At least three Volunteer Examiners of General class or higher

7. - G1E12

When may third-party messages be transmitted via remote control?

Select	Answer
A	Only when the message is intended for licensed radio amateurs
B	Under any circumstances in which third party messages are permitted by FCC rules
C	Only when the message is intended for third parties in areas where licensing is controlled by the FCC
D	Under no circumstances except for emergencies

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	Less subject to interference from atmospheric static crashes
C	Ease of tuning on receive and immunity to impulse noise
D	Less bandwidth used and greater power efficiency

9. - G2B04

When selecting a CW transmitting frequency, what minimum separation from other stations should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	3 kHz to 6 kHz
B	150 Hz to 500 Hz
C	1 kHz to 3 kHz
D	5 Hz to 50 Hz

10. - G2C05

What is the best speed to use when answering a CQ in Morse code?

Select	Answer
A	At the standard calling speed of 10 wpm
B	The fastest speed at which you are comfortable copying, but no slower than the CQ
C	The fastest speed at which you are comfortable copying, but no faster than the CQ
D	At the standard calling speed of 5 wpm

11. - G2D10

What is QRP operation?

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

12. - G2E11

What is the primary purpose of an Amateur Radio Emergency Data Network (AREDN) mesh network?

Select	Answer
A	To provide FM repeater coverage in remote areas
B	To provide real time propagation data by monitoring amateur radio transmissions worldwide
C	To provide high-speed data services during an emergency or community event
D	To provide DX spotting reports to aid contesters and DXers

13. - G3A09

How can high geomagnetic activity benefit radio communications?

Select	Answer
A	Improve HF long path propagation
B	Reduce long delayed echoes
C	Increases signal strength for HF signals passing through the polar regions
D	Creates auroras that can reflect VHF signals

14. - G3B09

What is the approximate maximum distance along the Earth’s surface normally covered in one hop using the F2 region?

Select	Answer
A	180 miles
B	2,500 miles
C	1,200 miles
D	12,000 miles

15. - G3C04

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

Select	Answer
A	The short path azimuth of a distant station
B	The lowest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions
C	The highest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions
D	The long path azimuth of a distant station

16. - G4A07

What happens as a receiver’s noise reduction control level is increased?

Select	Answer
A	Received frequency may shift several kHz
B	CW signals may become severely attenuated
C	Received signals may become distorted
D	Received frequency may become unstable

17. - G4B10

Which of the following can be determined with a directional wattmeter?

Select	Answer
A	Standing wave ratio
B	Radio wave propagation
C	Antenna front-to-back ratio
D	RF interference

18. - G4C01

Which of the following might be useful in reducing RF interference to audio frequency circuits?

Select	Answer
A	Bypass inductor
B	Forward-biased diode
C	Bypass capacitor
D	Reverse-biased diode

19. - G4D04

What does an S meter measure?

Select	Answer
A	Impedance
B	Carrier suppression
C	Received signal strength
D	Transmitter power output

20. - G4E10

Why should a series diode be connected between a solar panel and a storage battery that is being charged by the panel?

Select	Answer
A	To prevent damage to the battery due to excessive voltage at high illumination levels
B	To limit the current flowing from the panel to a safe value
C	To prevent discharge of the battery through the panel during times of low or no illumination
D	To prevent overload by regulating the charging voltage

21. - G5A07

What is the term for the inverse of impedance?

Select	Answer
A	Susceptance
B	Admittance
C	Conductance
D	Reluctance

22. - G5B09

What is the RMS voltage of a sine wave with a value of 17 volts peak?

Select	Answer
A	8.5 volts
B	34 volts
C	24 volts
D	12 volts

23. - G5C02

What is the output voltage if an input signal is applied to the secondary winding of a 4:1 voltage step-down transformer instead of the primary winding?

Select	Answer
A	The input voltage is divided by 4
B	The input voltage is multiplied by 4
C	Additional resistance must be added in series with the primary to prevent overload
D	Additional resistance must be added in parallel with the secondary to prevent overload

24. - G6A03

What is the approximate forward threshold voltage of a germanium diode?

Select	Answer
A	1.0 volts
B	0.3 volts
C	0.7 volts
D	0.1 volt

25. - G6B01

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

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

26. - G7A12

Which symbol in Figure G7-1 represents a solid core transformer?

Select	Answer
A	Symbol 1
B	Symbol 4
C	Symbol 6
D	Symbol 7

27. - G7B06

What is a shift register?

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

28. - G7C01

What circuit is used to select one of the sidebands from a balanced modulator?

Select	Answer
A	Filter
B	IF amplifier
C	Carrier oscillator
D	RF amplifier

29. - G8A01

How is direct binary FSK modulation generated?

Select	Answer
A	By using a transceiver’s computer data interface protocol to change frequencies
B	By reconfiguring the CW keying input to act as a tone generator
C	By changing an oscillator’s frequency directly with a digital control signal
D	By keying an FM transmitter with a sub-audible tone

30. - G8B02

What is the term for interference from a signal at twice the IF frequency from the desired signal?

Select	Answer
A	Image response
B	Quadrature response
C	Mixer interference
D	Intermediate interference

31. - G8C13

What is indicated on a waterfall display by one or more vertical lines on either side of a data mode or RTTY signal?

Select	Answer
A	Long path propagation
B	Overmodulation
C	Insufficient modulation
D	Backscatter propagation

32. - G9A06

In what units is RF feed line loss usually expressed?

Select	Answer
A	Ohms per 100 feet
B	Decibels per 1,000 feet
C	Ohms per 1,000 feet
D	Decibels per 100 feet

33. - G9B11

What is the approximate length for a 1/2 wave dipole antenna cut for 3.550 MHz?

Select	Answer
A	42 feet
B	132 feet
C	263 feet
D	84 feet

34. - G9C02

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

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

35. - G9D02

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

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

Figure G7-1