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

2. - G0B10

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

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

3. - G1A02

On which of the following bands is phone operation prohibited?

Select	Answer
A	30 meters
B	12 meters
C	17 meters
D	160 meters

4. - G1B03

Which of the following is a purpose of a beacon station as identified in the FCC rules?

Select	Answer
A	Observation of propagation and reception
B	All these choices are correct
C	Transmission of bulletins of general interest to amateur radio licensees
D	Automatic identification of repeaters

5. - G1C01

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

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

6. - G1D02

What license examinations may you administer as an accredited Volunteer Examiner holding a General class operator license?

Select	Answer
A	General and Technician
B	None, only Amateur Extra class licensees may be accredited
C	Amateur Extra, General, and Technician
D	Technician only

7. - G1E12

When may third-party messages be transmitted via remote control?

Select	Answer
A	Only when the message is intended for third parties in areas where licensing is controlled by the FCC
B	Under no circumstances except for emergencies
C	Only when the message is intended for licensed radio amateurs
D	Under any circumstances in which third party messages are permitted by FCC rules

8. - G2A09

Why do most amateur stations use lower sideband on the 160-, 75-, and 40-meter bands?

Select	Answer
A	Lower sideband is more efficient than upper sideband at these frequencies
B	Because it is fully compatible with an AM detector
C	Lower sideband is the only sideband legal on these frequency bands
D	It is commonly accepted amateur practice

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	3 kHz to 6 kHz
C	1 kHz to 3 kHz
D	5 Hz to 50 Hz

10. - G2C05

What is the best speed to use when answering a CQ in Morse code?

Select	Answer
A	At the standard calling speed of 5 wpm
B	The fastest speed at which you are comfortable copying, but no faster than the CQ
C	At the standard calling speed of 10 wpm
D	The fastest speed at which you are comfortable copying, but no slower than the CQ

11. - G2D10

What is QRP operation?

Select	Answer
A	Transmission using Quick Response Protocol
B	Low-power transmit operation
C	Traffic relay procedure net operation
D	Remote piloted model control

12. - G2E05

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

Select	Answer
A	DSB
B	LSB
C	SSB
D	USB

13. - G3A07

At what point in the solar cycle does the 20-meter band usually support worldwide propagation during daylight hours?

Select	Answer
A	Only at the maximum point
B	Only at the minimum point
C	At the summer solstice
D	At any point

14. - G3B08

What does MUF stand for?

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

15. - G3C04

What does the term “critical angle” mean, as applied to radio wave propagation?

Select	Answer
A	The highest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions
B	The long path azimuth of a distant station
C	The lowest takeoff angle that will return a radio wave to Earth under specific ionospheric conditions
D	The short path azimuth of a distant station

16. - G4A11

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

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

17. - G4B02

Which of the following is an advantage of an oscilloscope versus a digital voltmeter?

Select	Answer
A	An oscilloscope uses less power
B	Complex impedances can be easily measured
C	Greater precision
D	Complex waveforms can be measured

18. - G4C06

What is a possible effect of a resonant ground connection?

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

19. - G4D11

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

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

20. - G4E01

What is the purpose of a capacitance hat on a mobile antenna?

Select	Answer
A	To increase the power handling capacity of a whip antenna
B	To electrically lengthen a physically short antenna
C	To reduce radiation resistance
D	To lower the radiation angle

21. - G5A04

Which of the following is opposition to the flow of alternating current in a capacitor?

Select	Answer
A	Reactance
B	Conductance
C	Reluctance
D	Admittance

22. - G5B14

What is the output PEP of 500 volts peak-to-peak across a 50-ohm load?

Select	Answer
A	625 watts
B	2500 watts
C	8.75 watts
D	5000 watts

23. - G5C06

What is the voltage output of a transformer with a 500-turn primary and a 1500-turn secondary when 120 VAC is applied to the primary?

Select	Answer
A	120 volts
B	25.5 volts
C	40 volts
D	360 volts

24. - G6A01

What is the minimum allowable discharge voltage for maximum life of a standard 12-volt lead-acid battery?

Select	Answer
A	12 volts
B	8.5 volts
C	10.5 volts
D	6 volts

25. - G6B04

What is a typical upper frequency limit for low SWR operation of 50-ohm BNC connectors?

Select	Answer
A	50 MHz
B	4 GHz
C	500 MHz
D	40 GHz

26. - G7A07

What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load?

Select	Answer
A	A series of DC pulses at the same frequency as the AC input
B	A sine wave at half the frequency of the AC input
C	A series of DC pulses at twice the frequency of the AC input
D	A steady DC voltage

27. - G7B05

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

Select	Answer
A	6
B	16
C	3
D	8

28. - G7C07

What term specifies a filter’s attenuation inside its passband?

Select	Answer
A	Return loss
B	Ultimate rejection
C	Q
D	Insertion loss

29. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

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

30. - G8B13

Which of the following is an odd-order intermodulation product of frequencies F1 and F2?

Select	Answer
A	All these choices are correct
B	2F1-F2
C	3F1-F2
D	5F1-3F2

31. - G8C09

Which is true of mesh network microwave nodes?

Select	Answer
A	If one node fails, a packet may still reach its target station via an alternate node
B	Links between two nodes in a network may have different frequencies and bandwidths
C	More nodes reduce overall microwave out of band interference
D	Having more nodes increases signal strengths

32. - G9A01

Which of the following factors determine the characteristic impedance of a parallel conductor feed line?

Select	Answer
A	The distance between the centers of the conductors and the length of the line
B	The frequency of the signal and the length of the line
C	The distance between the centers of the conductors and the radius of the conductors
D	The radius of the conductors and the frequency of the signal

33. - G9B01

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

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

34. - G9C11

What is a beta or hairpin match?

Select	Answer
A	A section of 300-ohm twin-lead transmission line used to match a folded dipole antenna
B	A series capacitor selected to cancel the inductive reactance of a folded dipole antenna
C	A shorted transmission line stub placed at the feed point of a Yagi antenna to provide impedance matching
D	A 1/4 wavelength section of 75-ohm coax in series with the feed point of a Yagi to provide impedance matching

35. - G9D08

How does a “screwdriver” mobile antenna adjust its feed point impedance?

Select	Answer
A	By varying the base loading inductance
B	By deploying a capacitance hat
C	By varying its body capacitance
D	By extending and retracting the whip