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

2. - G0B08

What should be done before climbing a tower that supports electrically powered devices?

Select	Answer
A	All these choices are correct
B	Notify the electric company that a person will be working on the tower
C	Make sure all circuits that supply power to the tower are locked out and tagged
D	Unground the base of the tower

3. - G1A02

On which of the following bands is phone operation prohibited?

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

4. - G1B04

Which of the following transmissions is permitted for all amateur stations?

Select	Answer
A	Unidentified transmissions of less than 10 seconds duration for test purposes only
B	Automatic retransmission of other amateur signals by any amateur station
C	Encrypted messages, if not intended to facilitate a criminal act
D	Occasional retransmission of weather and propagation forecast information from US government stations

5. - G1C03

What is the maximum bandwidth permitted by FCC rules for amateur radio stations transmitting on USB frequencies in the 60-meter band?

Select	Answer
A	5.6 kHz
B	1.8 kHz
C	2.8 kHz
D	3 kHz

6. - G1D04

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

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

7. - G1E07

In what part of the 2.4 GHz band may an amateur station communicate with non-licensed Wi-Fi stations?

Select	Answer
A	Channels 42 through 45
B	Anywhere in the band
C	No part
D	Channels 1 through 4

8. - G2A01

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

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

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

10. - G2C06

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

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

11. - G2D01

What is the Volunteer Monitor Program?

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

12. - G2E14

What could be wrong if you cannot decode an RTTY or other FSK signal even though it is apparently tuned in properly?

Select	Answer
A	All these choices are correct
B	The mark and space frequencies may be reversed
C	You may be listening on the wrong sideband
D	You may have selected the wrong baud rate

13. - G3A02

What effect does a sudden ionospheric disturbance have on the daytime ionospheric propagation?

Select	Answer
A	It disrupts communications via satellite more than direct communications
B	It enhances propagation on all HF frequencies
C	None, because only areas on the night side of the Earth are affected
D	It disrupts signals on lower frequencies more than those on higher frequencies

14. - G3B07

What does LUF stand for?

Select	Answer
A	The Lowest Usable Frequency during a 24-hour period
B	The Lowest Usable Frequency for communications between two specific points
C	Lowest Usable Frequency during the past 60 minutes
D	Lowest Usable Frequency for communications to any point outside a 100-mile radius

15. - G3C07

What makes HF scatter signals often sound distorted?

Select	Answer
A	Ground waves are absorbing much of the signal
B	Energy is scattered into the skip zone through several different paths
C	The ionospheric region involved is unstable
D	The E region is not present

16. - G4A08

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

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

17. - G4B01

What item of test equipment contains horizontal and vertical channel amplifiers?

Select	Answer
A	An oscilloscope
B	A signal generator
C	An ohmmeter
D	An ammeter

18. - G4C09

How can the effects of ground loops be minimized?

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

19. - G4D08

What frequency range is occupied by a 3 kHz LSB signal when the displayed carrier frequency is set to 7.178 MHz?

Select	Answer
A	7.178 MHz to 7.184 MHz
B	7.178 MHz to 7.181 MHz
C	7.1765 MHz to 7.1795 MHz
D	7.175 MHz to 7.178 MHz

20. - G4E11

What precaution should be taken when connecting a solar panel to a lithium iron phosphate battery?

Select	Answer
A	Ground the solar panel outer metal framework
B	Ensure the battery is placed terminals-up
C	A series resistor must be in place
D	The solar panel must have a charge controller

21. - G5A09

What unit is used to measure reactance?

Select	Answer
A	Ohm
B	Ampere
C	Siemens
D	Farad

22. - G5B02

How does the total current relate to the individual currents in a circuit of parallel resistors?

Select	Answer
A	It is the sum of the reciprocal of each individual voltage drop
B	It decreases as more parallel branches are added to the circuit
C	It equals the sum of the currents through each branch
D	It equals the average of the branch currents

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. - G6A12

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

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

25. - G6B12

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

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

26. - G7A13

Which symbol in Figure G7-1 represents a tapped inductor?

Select	Answer
A	Symbol 7
B	Symbol 6
C	Symbol 11
D	Symbol 1

27. - G7B04

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

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

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 minimize radiation resistance
C	To present the desired impedance to the transmitter and feed line
D	To minimize transmitter power output

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 keying an FM transmitter with a sub-audible tone
C	By changing an oscillator’s frequency directly with a digital control signal
D	By reconfiguring the CW keying input to act as a tone generator

30. - G8B01

Which mixer input is varied or tuned to convert signals of different frequencies to an intermediate frequency (IF)?

Select	Answer
A	Beat frequency oscillator
B	RF input
C	Local oscillator
D	Image frequency

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	Insufficient modulation
B	Backscatter propagation
C	Overmodulation
D	Long path propagation

32. - G9A01

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

Select	Answer
A	The frequency of the signal and the length of the line
B	The radius of the conductors and the frequency of the signal
C	The distance between the centers of the conductors and the radius of the conductors
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	Lower feed point impedance
B	Lower radiation resistance
C	Lower ground losses
D	Shorter radials

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

35. - G9D06

Which of the following is an advantage of a log-periodic antenna?

Select	Answer
A	Higher gain per element than a Yagi antenna
B	Polarization diversity
C	Wide bandwidth
D	Harmonic suppression

Figure G7-1