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. - G0A01

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

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

2. - G0B04

Where should the station’s lightning protection ground system be located?

Select	Answer
A	Parallel to the water supply line
B	Outside the building
C	Next to the closest power pole
D	As close to the station equipment as possible

3. - G1A04

Which of the following amateur bands is restricted to communication only on specific channels, rather than frequency ranges?

Select	Answer
A	12 meters
B	30 meters
C	11 meters
D	60 meters

4. - G1B04

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

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

5. - G1C02

What is the maximum transmitter power an amateur station may use on the 12-meter band?

Select	Answer
A	An effective radiated power equivalent to 100 watts from a half-wave dipole
B	200 watts PEP output
C	50 watts PEP output
D	1500 watts PEP output

6. - G1D10

What is the minimum age that one must be to qualify as an accredited Volunteer Examiner?

Select	Answer
A	18 years
B	21 years
C	There is no age limit
D	16 years

7. - G1E12

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

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

8. - G2A12

What control is typically adjusted for proper ALC setting on a single sideband transceiver?

Select	Answer
A	Antenna inductance or capacitance
B	RF clipping level
C	Attenuator level
D	Transmit audio or microphone gain

9. - G2B07

Which of the following complies with commonly accepted amateur practice when choosing a frequency on which to initiate a call?

Select	Answer
A	Identify your station by transmitting your call sign at least 3 times
B	Listen on the frequency for at least two minutes to be sure it is clear
C	Follow the voluntary band plan
D	All these choices are correct

10. - G2C06

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

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

11. - G2D11

Why are signal reports typically exchanged at the beginning of an HF contact?

Select	Answer
A	To allow each station to operate according to conditions
B	To be sure the contact will count for award programs
C	To follow standard radiogram structure
D	To allow each station to calibrate their frequency display

12. - G2E10

Which of the following is a way to establish contact with a digital messaging system gateway station?

Select	Answer
A	Send an email to the system control operator
B	Respond when the station broadcasts its SSID
C	Send QRL in Morse code
D	Transmit a connect message on the station’s published frequency

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	VHF/UHF ducting is improved
C	HF communication is disturbed
D	VHF/UHF ducting is disturbed

14. - G3B04

Which of the following is a way to determine current propagation on a desired band from your station?

Select	Answer
A	All these choices are correct
B	Check the A-index
C	Use a network of automated receiving stations on the internet to see where your transmissions are being received
D	Send a series of dots and listen for echoes

15. - G3C02

What is meant by the term “critical frequency” at a given incidence angle?

Select	Answer
A	The highest frequency which is refracted back to Earth
B	The frequency at which the signal-to-noise ratio approaches unity
C	The lowest frequency which is refracted back to Earth
D	The frequency at which the signal-to-noise ratio is 6 dB

16. - G4A08

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

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

17. - G4B05

Why do voltmeters have high input impedance?

Select	Answer
A	It improves the frequency response
B	It decreases the loading on circuits being measured
C	It improves the resolution of the readings
D	It allows for higher voltages to be safely measured

18. - G4C11

What technique helps to minimize RF “hot spots” in an amateur station?

Select	Answer
A	Placing low-pass filters on all feed lines
B	Using surge suppressor power outlets
C	Building all equipment in a metal enclosure
D	Bonding all equipment enclosures together

19. - G4D03

What is the effect of an incorrectly adjusted speech processor?

Select	Answer
A	Excess intermodulation products
B	All these choices are correct
C	Excessive background noise
D	Distorted speech

20. - G4E04

Why should DC power for a 100-watt HF transceiver not be supplied by a vehicle’s auxiliary power socket?

Select	Answer
A	The socket is not wired with an RF-shielded power cable
B	The socket’s wiring may be inadequate for the current drawn by the transceiver
C	The DC polarity of the socket is reversed from the polarity of modern HF transceivers
D	Drawing more than 50 watts from this socket could cause the engine to overheat

21. - G5A09

What unit is used to measure reactance?

Select	Answer
A	Ampere
B	Ohm
C	Siemens
D	Farad

22. - G5B11

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

Select	Answer
A	2.00
B	1.414
C	0.707
D	1.00

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	360 volts
B	25.5 volts
C	40 volts
D	120 volts

24. - G6A01

What is the minimum allowable discharge voltage for maximum life of a standard 12-volt lead-acid battery?

Select	Answer
A	10.5 volts
B	8.5 volts
C	6 volts
D	12 volts

25. - G6B08

How is an LED biased when emitting light?

Select	Answer
A	In the tunnel-effect region
B	At the Zener voltage
C	Reverse biased
D	Forward biased

26. - G7A05

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

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

27. - G7B03

Which of the following describes the function of a two-input AND gate?

Select	Answer
A	Output is high when either or both inputs are low
B	Output is low only when both inputs are high
C	Output is high only when both inputs are high
D	Output is low when either or both inputs are high

28. - G7C07

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

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

29. - G8A12

What is QPSK modulation?

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

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. - G8C02

Which digital mode is used as a low-power beacon for assessing HF propagation?

Select	Answer
A	WSPR
B	PSK31
C	MFSK16
D	SSB-SC

32. - G9A02

What is the relationship between high standing wave ratio (SWR) and transmission line loss?

Select	Answer
A	High SWR makes it difficult to measure transmission line loss
B	There is no relationship between transmission line loss and SWR
C	High SWR increases loss in a lossy transmission line
D	High SWR reduces the relative effect of transmission line loss

33. - G9B10

What is the approximate length for a 1/2 wave dipole antenna cut for 14.250 MHz?

Select	Answer
A	16 feet
B	24 feet
C	33 feet
D	8 feet

34. - G9C01

Which of the following would increase the bandwidth of a Yagi antenna?

Select	Answer
A	Larger-diameter elements
B	Tapered-diameter elements
C	Closer element spacing
D	Loading coils in series with the element

35. - G9D08

How does a “screwdriver” mobile antenna adjust its feed point impedance?

Select	Answer
A	By extending and retracting the whip
B	By deploying a capacitance hat
C	By varying the base loading inductance
D	By varying its body capacitance