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

2. - G0B06

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

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

3. - G1A01

On which HF and/or MF amateur bands are there portions where General class licensees cannot transmit?

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

4. - G1B01

What is the maximum height above ground for an antenna structure not near a public use airport without requiring notification to the FAA and registration with the FCC?

Select	Answer
A	50 feet
B	250 feet
C	100 feet
D	200 feet

5. - G1C01

What is the maximum transmitter power an amateur station may use on 10.140 MHz?

Select	Answer
A	1000 watts PEP output
B	200 watts PEP output
C	1500 watts PEP output
D	2000 watts PEP output

6. - G1D12

When operating a station in South America by remote control over the internet from the US, what regulations apply?

Select	Answer
A	Those of the remote station’s country and the FCC’s third-party regulations
B	Only those of the remote station’s country
C	Those of both the remote station’s country and the FCC
D	Only those of the FCC

7. - G1E02

When may a 10-meter repeater retransmit the 2-meter signal from a station that has a Technician class control operator?

Select	Answer
A	Only during an FCC-declared general state of communications emergency
B	Only if the 10-meter repeater control operator holds at least a General class license
C	Only if the station on 10-meters is operating under a Special Temporary Authorization allowing such retransmission
D	Under no circumstances

8. - G2A06

Which of the following is an advantage of using single sideband, as compared to other analog voice modes on the HF amateur bands?

Select	Answer
A	Ease of tuning on receive and immunity to impulse noise
B	Less bandwidth used and greater power efficiency
C	Less subject to interference from atmospheric static crashes
D	Very high-fidelity voice modulation

9. - G2B01

Which of the following is true concerning access to frequencies?

Select	Answer
A	Nets have priority
B	Contest operations should yield to non-contest use of frequencies
C	Except during emergencies, no amateur station has priority access to any frequency
D	QSOs in progress have priority

10. - G2C06

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

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

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 follow standard radiogram structure
C	To allow each station to calibrate their frequency display
D	To be sure the contact will count for award programs

12. - G2E08

In what segment of the 20-meter band are most digital mode operations commonly found?

Select	Answer
A	Between 14.070 MHz and 14.100 MHz
B	At the bottom of the slow-scan TV segment, near 14.230 MHz
C	In the middle of the CW segment, near 14.100 MHz
D	At the top of the SSB phone segment, near 14.325 MHz

13. - G3A10

What causes HF propagation conditions to vary periodically in a 26- to 28-day cycle?

Select	Answer
A	Long term oscillations in the upper atmosphere
B	Rotation of the Sun’s surface layers around its axis
C	Cyclic variation in Earth’s radiation belts
D	The position of the Moon in its orbit

14. - G3B10

What is the approximate maximum distance along the Earth’s surface normally covered in one hop using the E region?

Select	Answer
A	12,000 miles
B	180 miles
C	1,200 miles
D	2,500 miles

15. - G3C11

Which ionospheric region is the most absorbent of signals below 10 MHz during daylight hours?

Select	Answer
A	The F2 region
B	The D region
C	The E region
D	The F1 region

16. - G4A13

What is the purpose of using a receive attenuator?

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

17. - G4B07

What signals are used to conduct a two-tone test?

Select	Answer
A	Two audio frequency range square wave signals of equal amplitude
B	Two audio signals of the same frequency shifted 90 degrees
C	Two swept frequency tones
D	Two non-harmonically related audio signals

18. - G4C03

What sound is heard from an audio device experiencing RF interference from a single sideband phone transmitter?

Select	Answer
A	Distorted speech
B	A steady hum whenever the transmitter is on the air
C	Clearly audible speech
D	On-and-off humming or clicking

19. - G4D10

How close to the lower edge of a band’s phone segment should your displayed carrier frequency be when using 3 kHz wide LSB?

Select	Answer
A	At least 1 kHz above the edge of the segment
B	At least 3 kHz below the edge of the segment
C	At least 3 kHz above the edge of the segment
D	At least 1 kHz below the edge of the segment

20. - G4E02

What is the purpose of a corona ball on an HF mobile antenna?

Select	Answer
A	To narrow the operating bandwidth of the antenna
B	To reduce RF voltage discharge from the tip of the antenna while transmitting
C	To increase the “Q” of the antenna
D	To reduce the chance of damage if the antenna should strike an object

21. - G5A01

What happens when inductive and capacitive reactance are equal in a series LC circuit?

Select	Answer
A	Resonance causes impedance to be very low
B	Resonance causes impedance to be very high
C	Impedance is equal to the geometric mean of the inductance and capacitance
D	Impedance is equal to the arithmetic mean of the inductance and capacitance

22. - G5B13

What is the output PEP of an unmodulated carrier if the average power is 1060 watts?

Select	Answer
A	1500 watts
B	1060 watts
C	530 watts
D	2120 watts

23. - G5C04

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

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

24. - G6A12

What is the primary purpose of a screen grid in a vacuum tube?

Select	Answer
A	To reduce grid-to-plate capacitance
B	To decrease plate resistance
C	To increase the control grid resistance
D	To increase efficiency

25. - G6B03

Which of the following is an advantage of CMOS integrated circuits compared to TTL integrated circuits?

Select	Answer
A	Better suited for power supply regulation
B	Better suited for RF amplification
C	High power handling capability
D	Low power consumption

26. - G7A11

Which symbol in figure G7-1 represents an NPN junction transistor?

Select	Answer
A	Symbol 2
B	Symbol 1
C	Symbol 11
D	Symbol 7

27. - G7B06

What is a shift register?

Select	Answer
A	A clocked array of circuits that passes data in steps along the array
B	A digital mixer
C	An analog mixer
D	An array of operational amplifiers used for tri-state arithmetic operations

28. - G7C04

How is a product detector used?

Select	Answer
A	Used in an FM receiver to filter out unwanted sidebands
B	Used in test gear to detect spurious mixing products
C	Used in a single sideband receiver to extract the modulated signal
D	Used in transmitter to perform frequency multiplication

29. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

Select	Answer
A	Single sideband
B	Frequency modulation
C	Vestigial sideband
D	Phase modulation

30. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

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

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	Overmodulation
B	Insufficient modulation
C	Long path propagation
D	Backscatter propagation

32. - G9A05

How does the attenuation of coaxial cable change with increasing frequency?

Select	Answer
A	Attenuation increases
B	Attenuation is independent of frequency
C	Attenuation decreases
D	Attenuation follows Marconi’s Law of Attenuation

33. - G9B01

What is a characteristic of a random-wire HF antenna connected directly to the transmitter?

Select	Answer
A	It is more effective on the lower HF bands than on the higher bands
B	It must be longer than 1 wavelength
C	It produces only vertically polarized radiation
D	Station equipment may carry significant RF current

34. - G9C04

How does antenna gain in dBi compare to gain stated in dBd for the same antenna?

Select	Answer
A	Gain in dBi is 2.15 dB lower
B	Gain in dBi is 2.15 dB higher
C	Gain in dBd is 1.25 dBd lower
D	Gain in dBd is 1.25 dBd higher

35. - G9D04

What is the primary function of antenna traps?

Select	Answer
A	To prevent out-of-band operation
B	To provide balanced feed point impedance
C	To enable multiband operation
D	To notch spurious frequencies

Figure G7-1