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. - G0A04

What does “time averaging” mean when evaluating RF radiation exposure?

Select	Answer
A	The average time it takes RF radiation to have any long-term effect on the body
B	The total time of the exposure
C	The average amount of power developed by the transmitter over a specific 24-hour period
D	The total RF exposure averaged over a certain period

2. - G0B05

Which of the following conditions will cause a ground fault circuit interrupter (GFCI) to disconnect AC power?

Select	Answer
A	Overvoltage on the hot wires
B	Current flowing from one or more of the hot wires to the neutral wire
C	Current flowing from one or more of the hot wires directly to ground
D	All these choices are correct

3. - G1A11

When General class licensees are not permitted to use the entire voice portion of a band, which portion of the voice segment is available to them?

Select	Answer
A	The upper frequency portion
B	The lower frequency portion
C	The lower frequency portion on frequencies below 7.3 MHz, and the upper portion on frequencies above 14.150 MHz
D	The upper frequency portion on frequencies below 7.3 MHz, and the lower portion on frequencies above 14.150 MHz

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 IEEE
C	The ITU
D	The control operator

5. - G1C09

What is the maximum power limit on the 60-meter band?

Select	Answer
A	ERP of 100 watts PEP with respect to a dipole
B	ERP of 100 watts PEP with respect to an isotropic antenna
C	1500 watts PEP
D	10 watts RMS

6. - G1D07

Volunteer Examiners are accredited by what organization?

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

7. - G1E03

What is required to conduct communications with a digital station operating under automatic control outside the automatic control band segments?

Select	Answer
A	The interrogating transmission must be made by another automatically controlled station
B	No third-party traffic may be transmitted
C	The station initiating the contact must be under local or remote control
D	The control operator of the interrogating station must hold an Amateur Extra class license

8. - G2A07

Which of the following statements is true of single sideband (SSB)?

Select	Answer
A	Only one sideband and the carrier are transmitted; the other sideband is suppressed
B	Only one sideband is transmitted; the other sideband and carrier are suppressed
C	SSB is the only voice mode authorized on the 160-, 75-, and 40-meter amateur bands
D	SSB is the only voice mode authorized on the 20-, 15-, and 10-meter amateur bands

9. - G2B08

What is the voluntary band plan restriction for US stations transmitting within the 48 contiguous states in the 50.1 MHz to 50.125 MHz band segment?

Select	Answer
A	Only digital contacts
B	Only contacts with stations not within the 48 contiguous states
C	Only SSTV contacts
D	Only contacts with other stations within the 48 contiguous states

10. - G2C09

What does the Q signal “QSL” mean?

Select	Answer
A	Send slower
B	We have already confirmed the contact
C	I have received and understood
D	We have worked before

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

12. - G2E06

What is the most common frequency shift for RTTY emissions in the amateur HF bands?

Select	Answer
A	170 Hz
B	425 Hz
C	850 Hz
D	85 Hz

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	The position of the Moon in its orbit
D	Long term oscillations in the upper atmosphere

14. - G3B08

What does MUF stand for?

Select	Answer
A	The Minimum Usable Frequency during a 24-hour period
B	The Minimum Usable Frequency for communications between two points
C	The Maximum Usable Frequency during a 24-hour period
D	The Maximum Usable Frequency for communications between two points

15. - G3C06

What is a characteristic of HF scatter?

Select	Answer
A	Scatter propagation occurs only at night
B	Phone signals have high intelligibility
C	There are very large, sudden swings in signal strength
D	Signals have a fluttering sound

16. - G4A05

Why is automatic level control (ALC) used with an RF power amplifier?

Select	Answer
A	To increase overall efficiency
B	To prevent excessive drive
C	To balance the transmitter audio frequency response
D	To reduce harmonic radiation

17. - G4B08

What transmitter performance parameter does a two-tone test analyze?

Select	Answer
A	Percentage of frequency modulation
B	Percentage of suppression of the carrier and undesired sideband for SSB
C	Percentage of carrier phase shift
D	Linearity

18. - G4C01

Which of the following might be useful in reducing RF interference to audio frequency circuits?

Select	Answer
A	Bypass capacitor
B	Forward-biased diode
C	Reverse-biased diode
D	Bypass inductor

19. - G4D06

How much change in signal strength is typically represented by one S unit?

Select	Answer
A	6 dB
B	12 dB
C	15 dB
D	18 dB

20. - G4E08

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

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

21. - G5A12

What occurs in an LC circuit at resonance?

Select	Answer
A	Inductive reactance and capacitive reactance cancel
B	Resistance is cancelled
C	The circuit radiates all its energy in the form of radio waves
D	Current and voltage are equal

22. - G5B04

How many watts of electrical power are consumed by a 12 VDC light bulb that draws 0.2 amperes?

Select	Answer
A	2.4 watts
B	6 watts
C	24 watts
D	60 watts

23. - G5C13

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

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

24. - G6A09

Which of the following describes MOSFET construction?

Select	Answer
A	The source is formed by depositing metal on silicon
B	The gate is formed by a back-biased junction
C	The source is separated from the drain by a thin insulating layer
D	The gate is separated from the channel by a thin insulating layer

25. - G6B02

What is meant by the term MMIC?

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

26. - G7A01

What is the function of a power supply bleeder resistor?

Select	Answer
A	It eliminates ground loop current
B	It removes shock hazards from the induction coils
C	It acts as a fuse for excess voltage
D	It discharges the filter capacitors when power is removed

27. - G7B05

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

Select	Answer
A	16
B	6
C	8
D	3

28. - G7C10

What is an advantage of using I-Q modulation with software-defined radios (SDRs)?

Select	Answer
A	The need for high resolution analog-to-digital converters is eliminated
B	Automatic conversion of the signal from digital to analog
C	Minimum detectible signal level is reduced
D	All types of modulation can be created with appropriate processing

29. - G8A01

How is direct binary FSK modulation generated?

Select	Answer
A	By reconfiguring the CW keying input to act as a tone generator
B	By using a transceiver’s computer data interface protocol to change frequencies
C	By changing an oscillator’s frequency directly with a digital control signal
D	By keying an FM transmitter with a sub-audible tone

30. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

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

31. - G8C03

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

Select	Answer
A	Directory
B	Trailer
C	Preamble
D	Header

32. - G9A04

What causes reflected power at an antenna’s feed point?

Select	Answer
A	Feeding the antenna with unbalanced feed line
B	Using more transmitter power than the antenna can handle
C	Operating an antenna at its resonant frequency
D	A difference between feed line impedance and antenna feed point impedance

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	If the antenna is too high, the pattern becomes unpredictable
B	Antenna height has no effect on the pattern
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. - G9C09

In free space, how does the gain of two three-element, horizontally polarized Yagi antennas spaced vertically 1/2 wavelength apart typically compare to the gain of a single three-element Yagi?

Select	Answer
A	Approximately 9 dB higher
B	Approximately 6 dB higher
C	Approximately 1.5 dB higher
D	Approximately 3 dB higher

35. - G9D07

Which of the following describes a log-periodic antenna?

Select	Answer
A	Impedance varies periodically as a function of frequency
B	Element length and spacing vary logarithmically along the boom
C	SWR varies periodically as a function of boom length
D	Gain varies logarithmically as a function of frequency