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. - G0A10

What should be done if evaluation shows that a neighbor might experience more than the allowable limit of RF exposure from the main lobe of a directional antenna?

Select	Answer
A	Change to a non-polarized antenna with higher gain
B	Use an antenna with a higher front-to-back ratio
C	Take precautions to ensure that the antenna cannot be pointed in their direction when they are present
D	All these choices are correct

2. - G0B10

Which of the following is a danger from lead-tin solder?

Select	Answer
A	High voltages can cause lead-tin solder to disintegrate suddenly
B	Tin in the solder can “cold flow,” causing shorts in the circuit
C	RF energy can convert the lead into a poisonous gas
D	Lead can contaminate food if hands are not washed carefully after handling the solder

3. - G1A08

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

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

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

5. - G1C07

What must be done before using a new digital protocol on the air?

Select	Answer
A	Publicly document the technical characteristics of the protocol
B	Type-certify equipment to FCC standards
C	Obtain an experimental license from the FCC
D	Submit a rule-making proposal to the FCC describing the codes and methods of the technique

6. - G1D10

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

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

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	Under no circumstances
C	When under automatic control
D	When messages are encrypted

8. - G2A05

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

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

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. - G2C08

What prosign is sent to indicate the end of a formal message when using CW?

Select	Answer
A	AR
B	KN
C	SK
D	BK

11. - G2D03

What procedure may be used by Volunteer Monitors to localize a station whose continuous carrier is holding a repeater on in their area?

Select	Answer
A	Compare signal strengths between the input and output of the repeater
B	Compare beam headings on the repeater input from their home locations with that of other Volunteer Monitors
C	All these choices are correct
D	Compare vertical and horizontal signal strengths on the input frequency

12. - G2E13

What is another name for a Winlink Remote Message Server?

Select	Answer
A	Gateway
B	RJ-45
C	Printer/Server
D	Terminal Node Controller

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

14. - G3B06

What usually happens to radio waves with frequencies below the LUF?

Select	Answer
A	They are refracted back to Earth
B	They are refracted and trapped in the ionosphere to circle Earth
C	They pass through the ionosphere
D	They are attenuated before reaching the destination

15. - G3C08

Why are HF scatter signals in the skip zone usually weak?

Select	Answer
A	Propagation is via ground waves, which absorb most of the signal energy
B	Propagation is via ducts in the F region, which absorb most of the energy
C	Only a small part of the signal energy is scattered into the skip zone
D	Signals are scattered from the magnetosphere, which is not a good reflector

16. - G4A02

What is the benefit of using the opposite or “reverse” sideband when receiving CW?

Select	Answer
A	More stations can be accommodated within a given signal passband
B	Interference from impulse noise will be eliminated
C	Accidental out-of-band operation can be prevented
D	It may be possible to reduce or eliminate interference from other signals

17. - G4B10

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

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

18. - G4C06

What is a possible effect of a resonant ground connection?

Select	Answer
A	Corrosion of the ground rod
B	High RF voltages on the enclosures of station equipment
C	Overheating of ground straps
D	A ground loop

19. - G4D02

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

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

20. - G4E03

Which of the following direct, fused power connections would be the best for a 100-watt HF mobile installation?

Select	Answer
A	To the battery using insulated heavy duty balanced transmission line
B	To the alternator or generator using heavy-gauge wire
C	To the battery using heavy-gauge wire
D	To the alternator or generator using insulated heavy duty balanced transmission line

21. - G5A03

Which of the following is opposition to the flow of alternating current in an inductor?

Select	Answer
A	Reluctance
B	Admittance
C	Conductance
D	Reactance

22. - G5B10

What percentage of power loss is equivalent to a loss of 1 dB?

Select	Answer
A	10.9 percent
B	20.6 percent
C	12.2 percent
D	25.9 percent

23. - G5C13

Which of the following components should be added to a capacitor to increase the capacitance?

Select	Answer
A	A capacitor in series
B	A capacitor in parallel
C	An inductor in series
D	An inductor in parallel

24. - G6A05

What is the approximate forward threshold voltage of a silicon junction diode?

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

25. - G6B02

What is meant by the term MMIC?

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

26. - G7A09

Which symbol in figure G7-1 represents a field effect transistor?

Select	Answer
A	Symbol 1
B	Symbol 2
C	Symbol 5
D	Symbol 4

27. - G7B05

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

Select	Answer
A	16
B	3
C	8
D	6

28. - G7C14

The bandwidth of a band-pass filter is measured between what two frequencies?

Select	Answer
A	Image and harmonic
B	Cutoff and rolloff
C	Upper and lower half-power
D	Pole and zero

29. - G8A09

What type of modulation is used by FT8?

Select	Answer
A	Amplitude compressed AM
B	8-tone frequency shift keying
C	Vestigial sideband
D	8-bit direct sequence spread spectrum

30. - G8B09

Why is it good to match receiver bandwidth to the bandwidth of the operating mode?

Select	Answer
A	It improves impedance matching of the antenna
B	It minimizes power consumption in the receiver
C	It results in the best signal-to-noise ratio
D	It is required by FCC rules

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	Backscatter propagation
D	Insufficient modulation

32. - G9A07

What must be done to prevent standing waves on a feed line connected to an antenna?

Select	Answer
A	The feed line must be an odd number of electrical quarter wavelengths long
B	The feed line must be an even number of physical half wavelengths long
C	The antenna feed point impedance must be matched to the characteristic impedance of the feed line
D	The antenna feed point must be at DC ground potential

33. - G9B07

How does the feed point impedance of a horizontal 1/2 wave dipole antenna change as the antenna height is reduced to 1/10 wavelength above ground?

Select	Answer
A	It steadily increases
B	It steadily decreases
C	It is unaffected by the height above ground
D	It peaks at about 1/8 wavelength above ground

34. - G9C05

What is the primary effect of increasing boom length and adding directors to a Yagi antenna?

Select	Answer
A	Resonant frequency is lower
B	Front-to-back ratio decreases
C	Beamwidth increases
D	Gain increases

35. - G9D10

In which direction or directions does an electrically small loop (less than 1/10 wavelength in circumference) have nulls in its radiation pattern?

Select	Answer
A	Broadside to the loop
B	Electrically small loops are omnidirectional
C	Broadside and in the plane of the loop
D	In the plane of the loop

Figure G7-1