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. - G0A02

Which of the following is used to determine RF exposure from a transmitted signal?

Select	Answer
A	Its duty cycle
B	Its frequency
C	All these choices are correct
D	Its power density

2. - G0B02

According to the National Electrical Code, what is the minimum wire size that may be used safely for wiring with a 20-ampere circuit breaker?

Select	Answer
A	AWG number 16
B	AWG number 12
C	AWG number 20
D	AWG number 8

3. - G1A09

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

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

4. - G1B07

What are the restrictions on the use of abbreviations or procedural signals in the amateur service?

Select	Answer
A	They are not permitted
B	They are limited to those expressly listed in Part 97 of the FCC rules
C	They may be used if they do not obscure the meaning of a message
D	Only “Q” signals are permitted

5. - G1C08

What is the maximum symbol rate permitted for RTTY or data emission transmitted at frequencies below 28 MHz?

Select	Answer
A	1200 baud
B	300 baud
C	56 kilobaud
D	19.6 kilobaud

6. - G1D03

On which of the following band segments may you operate if you are a Technician class operator and have an unexpired Certificate of Successful Completion of Examination (CSCE) for General class privileges?

Select	Answer
A	On any General or Technician class band segment except 30 meters and 60 meters
B	On any General or Technician class band segment
C	Only the Technician band segments until your upgrade is posted in the FCC database
D	Only on the Technician band segments until you have a receipt for the FCC application fee payment

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

8. - G2A05

Which mode of voice communication is most commonly used on the HF amateur bands?

Select	Answer
A	Single sideband
B	Single phase modulation
C	Double sideband
D	Frequency modulation

9. - G2B11

How often may RACES training drills and tests be routinely conducted without special authorization?

Select	Answer
A	No more than 2 hours per month
B	No more than 2 hours per week
C	No more than 1 hour per week
D	No more than 1 hour per month

10. - G2C10

What does the Q signal “QRN” mean?

Select	Answer
A	Send more slowly
B	Zero beat my signal
C	Stop sending
D	I am troubled by static

11. - G2D08

Why do many amateurs keep a station log?

Select	Answer
A	The FCC requires a log of all international contacts
B	To help with a reply if the FCC requests information about your station
C	The log provides evidence of operation needed to renew a license without retest
D	The FCC requires a log of all international third-party traffic

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	You may have selected the wrong baud rate
C	You may be listening on the wrong sideband
D	The mark and space frequencies may be reversed

13. - G3A02

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

Select	Answer
A	It enhances propagation on all HF frequencies
B	It disrupts communications via satellite more than direct communications
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. - G3B03

Which frequency will have the least attenuation for long-distance skip propagation?

Select	Answer
A	Just below the MUF
B	Just above the critical frequency
C	Just below the critical frequency
D	Just above the LUF

15. - G3C09

What type of propagation allows signals to be heard in the transmitting station’s skip zone?

Select	Answer
A	Faraday rotation
B	Scatter
C	Short-path
D	Chordal hop

16. - G4A05

Why is automatic level control (ALC) used with an RF power amplifier?

Select	Answer
A	To prevent excessive drive
B	To increase overall efficiency
C	To reduce harmonic radiation
D	To balance the transmitter audio frequency response

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. - G4C02

Which of the following could be a cause of interference covering a wide range of frequencies?

Select	Answer
A	Arcing at a poor electrical connection
B	Not using a balun or line isolator to feed balanced antennas
C	Lack of rectification of the transmitter’s signal in power conductors
D	Using a balun to feed an unbalanced antenna

19. - G4D09

What frequency range is occupied by a 3 kHz USB signal with the displayed carrier frequency set to 14.347 MHz?

Select	Answer
A	14.3455 MHz to 14.3485 MHz
B	14.347 MHz to 14.647 MHz
C	14.344 MHz to 14.347 MHz
D	14.347 MHz to 14.350 MHz

20. - G4E08

In what configuration are the individual cells in a solar panel connected together?

Select	Answer
A	Bypass
B	Full-wave bridge
C	Series-parallel
D	Shunt

21. - G5A02

What is reactance?

Select	Answer
A	Reinforcement of the flow of direct current caused by resistance
B	Opposition to the flow of alternating current caused by capacitance or inductance
C	Opposition to the flow of direct current caused by resistance
D	Reinforcement of the flow of alternating current caused by capacitance or inductance

22. - G5B08

What is the peak-to-peak voltage of a sine wave with an RMS voltage of 120 volts?

Select	Answer
A	339.4 volts
B	169.7 volts
C	240.0 volts
D	84.8 volts

23. - G5C04

What is the approximate total resistance of a 100- and a 200-ohm resistor in parallel?

Select	Answer
A	150 ohms
B	75 ohms
C	300 ohms
D	67 ohms

24. - G6A10

Which element of a vacuum tube regulates the flow of electrons between cathode and plate?

Select	Answer
A	Control grid
B	Screen grid
C	Trigger electrode
D	Suppressor grid

25. - G6B11

What is an SMA connector?

Select	Answer
A	A small threaded connector suitable for signals up to several GHz
B	A type of push-on connector intended for high-voltage applications
C	A connector designed for serial multiple access signals
D	A type-S to type-M adaptor

26. - G7A03

Which type of rectifier circuit uses two diodes and a center-tapped transformer?

Select	Answer
A	Full-wave
B	Half-wave
C	Synchronous
D	Full-wave bridge

27. - G7B09

What determines the frequency of an LC oscillator?

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

28. - G7C03

What is one reason to use an impedance matching transformer at a transmitter output?

Select	Answer
A	To minimize radiation resistance
B	To present the desired impedance to the transmitter and feed line
C	To minimize transmitter power output
D	To reduce power supply ripple

29. - G8A12

What is QPSK modulation?

Select	Answer
A	Modulation in which digital data is transmitted using 0-, 90-, 180- and 270-degrees phase shift to represent pairs of bits
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 quadra-pole sideband keying to generate spread spectrum signals
D	Modulation using quasi-parallel to serial conversion to reduce bandwidth

30. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

Select	Answer
A	Bandwidth is half the symbol rate
B	Higher symbol rates require wider bandwidth
C	Symbol rate and bandwidth are not related
D	Lower symbol rates require wider bandwidth

31. - G8C11

How are the two separate frequencies of a Frequency Shift Keyed (FSK) signal identified?

Select	Answer
A	On and off
B	Dot and dash
C	High and low
D	Mark and space

32. - G9A04

What causes reflected power at an antenna’s feed point?

Select	Answer
A	Using more transmitter power than the antenna can handle
B	Operating an antenna at its resonant frequency
C	A difference between feed line impedance and antenna feed point impedance
D	Feeding the antenna with unbalanced feed 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 ground losses
C	Shorter radials
D	Lower radiation resistance

34. - G9C07

What does “front-to-back ratio” mean in reference to a Yagi antenna?

Select	Answer
A	The number of directors versus the number of reflectors
B	The power radiated in the major lobe compared to that in the opposite direction
C	The ratio of forward gain to dipole gain
D	The relative position of the driven element with respect to the reflectors and directors

35. - G9D02

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

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