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. - G0A05

What must you do if an evaluation of your station shows that the RF energy radiated by your station exceeds permissible limits for possible human absorption?

Select	Answer
A	File an Environmental Impact Statement (EIS-97) with the FCC
B	All these choices are correct
C	Take action to prevent human exposure to the excessive RF fields
D	Secure written permission from your neighbors to operate above the controlled MPE limits

2. - G0B10

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

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

3. - G1A09

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

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

4. - G1B06

Under what conditions are state and local governments permitted to regulate amateur radio antenna structures?

Select	Answer
A	At any time and to any extent necessary to accomplish a legitimate purpose of the state or local entity, provided that proper filings are made with the FCC
B	Only when such structures exceed 50 feet in height and are clearly visible 1,000 feet from the structure
C	Amateur Service communications must be reasonably accommodated, and regulations must constitute the minimum practical to accommodate a legitimate purpose of the state or local entity
D	Under no circumstances, FCC rules take priority

5. - G1C11

What measurement is specified by FCC rules that regulate maximum power?

Select	Answer
A	RMS output from the transmitter
B	PEP input to the antenna
C	RMS input to the antenna
D	PEP output from the transmitter

6. - G1D04

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

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

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

8. - G2A12

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

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

9. - G2B02

What is the first thing you should do if you are communicating with another amateur station and hear a station in distress break in?

Select	Answer
A	Immediately decrease power to avoid interfering with the station in distress
B	Inform your local emergency coordinator
C	Immediately cease all transmissions
D	Acknowledge the station in distress and determine what assistance may be needed

10. - G2C02

What should you do if a CW station sends “QRS?”

Select	Answer
A	Increase your power
B	Send slower
C	Repeat everything twice
D	Change frequency

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

12. - G2E05

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

Select	Answer
A	USB
B	SSB
C	DSB
D	LSB

13. - G3A09

How can high geomagnetic activity benefit radio communications?

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

14. - G3B02

What factors affect the MUF?

Select	Answer
A	Time of day and season
B	Solar radiation and ionospheric disturbances
C	Path distance and location
D	All these choices are correct

15. - G3C05

Why is long-distance communication on the 40-, 60-, 80-, and 160-meter bands more difficult during the day?

Select	Answer
A	The E region is unstable during daylight hours
B	The F region is unstable during daylight hours
C	The F region absorbs signals at these frequencies during daylight hours
D	The D region absorbs signals at these frequencies during daylight hours

16. - G4A13

What is the purpose of using a receive attenuator?

Select	Answer
A	To reduce power consumption when operating from batteries
B	To reduce the transmitter power when driving a linear amplifier
C	To prevent receiver overload from strong incoming signals
D	To reduce excessive audio level on strong signals

17. - G4B10

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

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

18. - G4C08

Which of the following would reduce RF interference caused by common-mode current on an audio cable?

Select	Answer
A	Place a ferrite choke on the cable
B	Add an additional insulating jacket to the cable
C	Ground the center conductor of the audio cable causing the interference
D	Connect the center conductor to the shield of all cables to short circuit the RFI signal

19. - G4D05

How does a signal that reads 20 dB over S9 compare to one that reads S9 on a receiver, assuming a properly calibrated S meter?

Select	Answer
A	It is 20 times less powerful
B	It is 20 times more powerful
C	It is 10 times less powerful
D	It is 100 times more powerful

20. - G4E11

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

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

21. - G5A10

Which of the following devices can be used for impedance matching at radio frequencies?

Select	Answer
A	A transformer
B	A Pi-network
C	A length of transmission line
D	All these choices are correct

22. - G5B10

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

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

23. - G5C07

What transformer turns ratio matches an antenna’s 600-ohm feed point impedance to a 50-ohm coaxial cable?

Select	Answer
A	12 to 1
B	3.5 to 1
C	24 to 1
D	144 to 1

24. - G6A06

Why should wire-wound resistors not be used in RF circuits?

Select	Answer
A	The resistor could overheat
B	The resistor’s inductance could make circuit performance unpredictable
C	The resistor’s internal capacitance would detune the circuit
D	The resistor’s tolerance value would not be adequate

25. - G6B05

What is an advantage of using a ferrite core toroidal inductor?

Select	Answer
A	Most of the magnetic field is contained in the core
B	All these choices are correct
C	The magnetic properties of the core may be optimized for a specific range of frequencies
D	Large values of inductance may be obtained

26. - G7A05

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

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

27. - G7B01

What is the purpose of neutralizing an amplifier?

Select	Answer
A	To cut off the final amplifier during standby periods
B	To keep the carrier on frequency
C	To eliminate self-oscillations
D	To limit the modulation index

28. - G7C09

What is the phase difference between the I and Q RF signals that software-defined radio (SDR) equipment uses for modulation and demodulation?

Select	Answer
A	Zero
B	45 degrees
C	180 degrees
D	90 degrees

29. - G8A12

What is QPSK modulation?

Select	Answer
A	Modulation using Fast Fourier Transforms to generate frequencies at the first, second, third, and fourth harmonics of the carrier frequency to improve noise immunity
B	Modulation using quadra-pole sideband keying to generate spread spectrum signals
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. - G8B02

What is the term for interference from a signal at twice the IF frequency from the desired signal?

Select	Answer
A	Image response
B	Quadrature response
C	Intermediate interference
D	Mixer interference

31. - G8C14

Which of the following describes a waterfall display?

Select	Answer
A	Frequency is vertical, signal strength is horizontal, time is intensity
B	Frequency is horizontal, signal strength is intensity, time is vertical
C	Frequency is vertical, signal strength is intensity, time is horizontal
D	Frequency is horizontal, signal strength is vertical, time is intensity

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 even number of physical half wavelengths long
B	The feed line must be an odd number of electrical quarter 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. - G9B09

Which of the following is an advantage of using a horizontally polarized as compared to a vertically polarized HF antenna?

Select	Answer
A	Shorter radials
B	Lower ground losses
C	Lower radiation resistance
D	Lower feed point impedance

34. - G9C05

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

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

35. - G9D02

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

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