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	Low duty cycle transmitters are exempt from RF exposure evaluation requirements
C	High duty cycle transmitters are exempt from RF exposure requirements
D	A higher duty cycle permits greater power levels to be transmitted

2. - G0B13

Where should lightning arrestors be located?

Select	Answer
A	In series with each ground lead
B	At the closest power pole ground electrode
C	On the antenna, opposite the feed point
D	Where the feed lines enter the building

3. - G1A05

On which of the following frequencies are General class licensees prohibited from operating as control operator?

Select	Answer
A	7.125 MHz to 7.175 MHz
B	21.275 MHz to 21.300 MHz
C	All these choices are correct
D	28.000 MHz to 28.025 MHz

4. - G1B07

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

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

5. - G1C01

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

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

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

7. - G1E08

What is the maximum PEP output allowed for spread spectrum transmissions?

Select	Answer
A	10 watts
B	100 watts
C	100 milliwatts
D	1500 watts

8. - G2A10

Which of the following statements is true of VOX operation versus PTT operation?

Select	Answer
A	It allows “hands free” operation
B	It provides more power output
C	It occupies less bandwidth
D	The received signal is more natural sounding

9. - G2B04

When selecting a CW transmitting frequency, what minimum separation from other stations should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	150 Hz to 500 Hz
B	1 kHz to 3 kHz
C	5 Hz to 50 Hz
D	3 kHz to 6 kHz

10. - G2C10

What does the Q signal “QRN” mean?

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

11. - G2D01

What is the Volunteer Monitor Program?

Select	Answer
A	Amateur volunteers who conduct amateur licensing examinations
B	Amateur volunteers who are formally enlisted to monitor the airwaves for rules violations
C	Amateur volunteers who use their station equipment to help civil defense organizations in times of emergency
D	Amateur volunteers who conduct frequency coordination for amateur VHF repeaters

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	You may have selected the wrong baud rate
B	You may be listening on the wrong sideband
C	All these choices are correct
D	The mark and space frequencies may be reversed

13. - G3A10

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

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

14. - G3B05

How does the ionosphere affect radio waves with frequencies below the MUF and above the LUF?

Select	Answer
A	They pass through the ionosphere
B	They are amplified by interaction with the ionosphere
C	They are refracted back to Earth
D	They are refracted and trapped in the ionosphere to circle Earth

15. - G3C01

Which ionospheric region is closest to the surface of Earth?

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

16. - G4A11

Why should the ALC system be inactive when transmitting AFSK data signals?

Select	Answer
A	When using digital modes, too much ALC activity can cause the transmitter to overheat
B	The ALC action distorts the signal
C	ALC will invert the modulation of the AFSK mode
D	All these choices are correct

17. - G4B13

Which of the following can be measured with an antenna analyzer?

Select	Answer
A	Front-to-back ratio of an antenna
B	Impedance of coaxial cable
C	Gain of a directional antenna
D	Power output from a transmitter

18. - G4C11

What technique helps to minimize RF “hot spots” in an amateur station?

Select	Answer
A	Building all equipment in a metal enclosure
B	Bonding all equipment enclosures together
C	Placing low-pass filters on all feed lines
D	Using surge suppressor power outlets

19. - G4D02

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

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

20. - G4E06

What is one disadvantage of using a shortened mobile antenna as opposed to a full-size antenna?

Select	Answer
A	Operating bandwidth may be very limited
B	Harmonic radiation may increase
C	Short antennas are more likely to cause distortion of transmitted signals
D	Q of the antenna will be very low

21. - G5A05

How does an inductor react to AC?

Select	Answer
A	As the amplitude of the applied AC increases, the reactance increases
B	As the amplitude of the applied AC increases, the reactance decreases
C	As the frequency of the applied AC increases, the reactance decreases
D	As the frequency of the applied AC increases, the reactance increases

22. - G5B12

What is the RMS voltage across a 50-ohm dummy load dissipating 1200 watts?

Select	Answer
A	692 volts
B	245 volts
C	173 volts
D	346 volts

23. - G5C10

What is the inductance of three 10-millihenry inductors connected in parallel?

Select	Answer
A	0.30 henries
B	3.3 millihenries
C	30 millihenries
D	3.3 henries

24. - G6A06

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

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

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	High power handling capability
C	Better suited for RF amplification
D	Low power consumption

26. - G7A10

Which symbol in figure G7-1 represents a Zener diode?

Select	Answer
A	Symbol 1
B	Symbol 4
C	Symbol 11
D	Symbol 5

27. - G7B11

For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?

Select	Answer
A	FM
B	SSB
C	All these choices are correct
D	AM

28. - G7C14

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

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

29. - G8A11

What is the modulation envelope of an AM signal?

Select	Answer
A	The bandwidth of the modulated signal
B	The carrier frequency that contains the signal
C	The waveform created by connecting the peak values of the modulated signal
D	Spurious signals that envelop nearby frequencies

30. - G8B03

What is another term for the mixing of two RF signals?

Select	Answer
A	Frequency inversion
B	Synthesizing
C	Phase inversion
D	Heterodyning

31. - G8C03

What part of a packet radio frame contains the routing and handling information?

Select	Answer
A	Directory
B	Trailer
C	Header
D	Preamble

32. - G9A10

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

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

33. - G9B05

How does antenna height affect the azimuthal radiation pattern of a horizontal dipole HF antenna at elevation angles higher than about 45 degrees?

Select	Answer
A	Antenna height has no effect on the pattern
B	If the antenna is too high, the pattern becomes unpredictable
C	If the antenna is less than 1/2 wavelength high, the azimuthal pattern is almost omnidirectional
D	If the antenna is less than 1/2 wavelength high, radiation off the ends of the wire is eliminated

34. - G9C02

What is the approximate length of the driven element of a Yagi antenna?

Select	Answer
A	3/4 wavelength
B	1 wavelength
C	1/2 wavelength
D	1/4 wavelength

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

Figure G7-1