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	A lower duty cycle permits greater power levels to be transmitted
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	High duty cycle transmitters are exempt from RF exposure requirements

2. - G0B06

Which of the following is covered by the National Electrical Code?

Select	Answer
A	Electrical safety of the station
B	Acceptable bandwidth limits
C	RF exposure limits of the human body
D	Acceptable modulation limits

3. - G1A08

Which HF bands have segments exclusively allocated to Amateur Extra licensees?

Select	Answer
A	60 meters, 30 meters, 17 meters, and 12 meters
B	80 meters, 40 meters, 20 meters, and 15 meters
C	All HF bands
D	All HF bands except 160 meters and 10 meters

4. - G1B11

Who or what determines “good engineering and good amateur practice,” as applied to the operation of an amateur station in all respects not covered by the Part 97 rules?

Select	Answer
A	The FCC
B	The ITU
C	The IEEE
D	The control operator

5. - G1C04

Which of the following is required by the FCC rules when operating in the 60-meter band?

Select	Answer
A	You must keep a record of all third-party traffic
B	You must keep a record of the date, time, frequency, power level, and stations worked
C	You must keep a record of the manufacturer of your equipment and the antenna used
D	If you are using an antenna other than a dipole, you must keep a record of the gain of your antenna

6. - G1D07

Volunteer Examiners are accredited by what organization?

Select	Answer
A	The Wireless Telecommunications Bureau
B	A Volunteer Examiner Coordinator
C	The Federal Communications Commission
D	The Universal Licensing System

7. - G1E09

Under what circumstances are messages that are sent via digital modes exempt from Part 97 third-party rules that apply to other modes of communication?

Select	Answer
A	When messages are not encrypted
B	When under automatic control
C	When messages are encrypted
D	Under no circumstances

8. - G2A09

Why do most amateur stations use lower sideband on the 160-, 75-, and 40-meter bands?

Select	Answer
A	Lower sideband is the only sideband legal on these frequency bands
B	Because it is fully compatible with an AM detector
C	Lower sideband is more efficient than upper sideband at these frequencies
D	It is commonly accepted amateur practice

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

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 speed of the transmitting station
D	Matching the transmit frequency to the frequency of a received signal

11. - G2D08

Why do many amateurs keep a station log?

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

12. - G2E05

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

Select	Answer
A	USB
B	LSB
C	SSB
D	DSB

13. - G3A09

How can high geomagnetic activity benefit radio communications?

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

14. - G3B07

What does LUF stand for?

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

15. - G3C04

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

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

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. - G4B06

What is an advantage of a digital multimeter as compared to an analog multimeter?

Select	Answer
A	Better for measuring computer circuits
B	Faster response
C	Less prone to overload
D	Higher precision

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	Reverse-biased diode
D	Bypass capacitor

19. - G4D02

How does a speech processor affect a single sideband phone signal?

Select	Answer
A	It reduces intermodulation distortion
B	It reduces harmonic distortion
C	It increases average power
D	It increases peak power

20. - G4E08

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

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

21. - G5A04

Which of the following is opposition to the flow of alternating current in a capacitor?

Select	Answer
A	Reactance
B	Reluctance
C	Admittance
D	Conductance

22. - G5B14

What is the output PEP of 500 volts peak-to-peak across a 50-ohm load?

Select	Answer
A	625 watts
B	8.75 watts
C	5000 watts
D	2500 watts

23. - G5C09

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

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

24. - G6A04

Which of the following is characteristic of an electrolytic capacitor?

Select	Answer
A	Inexpensive RF capacitor
B	Much less leakage than any other type
C	High capacitance for a given volume
D	Tight tolerance

25. - G6B02

What is meant by the term MMIC?

Select	Answer
A	Mode Modulated Integrated Circuit
B	Multi-Mode Integrated Circuit
C	Monolithic Microwave Integrated Circuit
D	Metal Monolayer Integrated Circuit

26. - G7A12

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

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

27. - G7B05

How many states does a 3-bit binary counter have?

Select	Answer
A	8
B	6
C	16
D	3

28. - G7C13

What term specifies a filter’s maximum ability to reject signals outside its passband?

Select	Answer
A	Insertion loss
B	Rolloff
C	Ultimate rejection
D	Notch depth

29. - G8A08

Which of the following is an effect of overmodulation?

Select	Answer
A	Insufficient audio
B	Insufficient bandwidth
C	Frequency drift
D	Excessive bandwidth

30. - G8B12

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

Select	Answer
A	Intermodulation
B	Heterodyning
C	Detection
D	Rolloff

31. - G8C07

Which of the following narrow-band digital modes can receive signals with very low signal-to-noise ratios?

Select	Answer
A	AMTOR
B	FT8
C	MSK144
D	MFSK32

32. - G9A10

What standing wave ratio results from connecting a 50-ohm feed line to a 10-ohm resistive load?

Select	Answer
A	1:2
B	2:1
C	1:5
D	5:1

33. - G9B04

What is the radiation pattern of a dipole antenna in free space in a plane containing the conductor?

Select	Answer
A	It is a figure-eight at right angles to the antenna
B	It has a pair of lobes on one side of the antenna and a single lobe on the other side
C	It is a figure-eight off both ends of the antenna
D	It is a circle (equal radiation in all directions)

34. - G9C11

What is a beta or hairpin match?

Select	Answer
A	A 1/4 wavelength section of 75-ohm coax in series with the feed point of a Yagi to provide impedance matching
B	A shorted transmission line stub placed at the feed point of a Yagi antenna to provide impedance matching
C	A series capacitor selected to cancel the inductive reactance of a folded dipole antenna
D	A section of 300-ohm twin-lead transmission line used to match a folded dipole antenna

35. - G9D09

What is the primary use of a Beverage antenna?

Select	Answer
A	Directional receiving for MF and low HF bands
B	Portable direction finding at lower HF frequencies
C	Directional transmitting for low HF bands
D	Portable direction finding at higher HF frequencies

Figure G7-1