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. - G0A02

Which of the following is used to determine RF exposure from a transmitted signal?

Select	Answer
A	Its duty cycle
B	Its frequency
C	Its power density
D	All these choices are correct

2. - G0B13

Where should lightning arrestors be located?

Select	Answer
A	In series with each ground lead
B	On the antenna, opposite the feed point
C	At the closest power pole ground electrode
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	21.275 MHz to 21.300 MHz
B	All these choices are correct
C	28.000 MHz to 28.025 MHz
D	7.125 MHz to 7.175 MHz

4. - G1B05

Which of the following one-way transmissions are permitted?

Select	Answer
A	All these choices are correct
B	Regular transmissions offering equipment for sale, if intended for amateur radio use
C	Unidentified test transmissions of less than 10 seconds in duration
D	Transmissions to assist with learning the International Morse code

5. - G1C10

What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 10-meter band?

Select	Answer
A	1200 baud
B	19.6 kilobaud
C	56 kilobaud
D	300 baud

6. - G1D02

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

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

7. - G1E12

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

Select	Answer
A	Under no circumstances except for emergencies
B	Only when the message is intended for third parties in areas where licensing is controlled by the FCC
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. - G2A12

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

Select	Answer
A	Transmit audio or microphone gain
B	Antenna inductance or capacitance
C	Attenuator level
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	Acknowledge the station in distress and determine what assistance may be needed
C	Immediately cease all transmissions
D	Inform your local emergency coordinator

10. - G2C07

When sending CW, what does a “C” mean when added to the RST report?

Select	Answer
A	Report was read from an S meter rather than estimated
B	Chirpy or unstable signal
C	100 percent copy
D	Key clicks

11. - G2D08

Why do many amateurs keep a station log?

Select	Answer
A	The FCC requires a log of all international third-party traffic
B	To help with a reply if the FCC requests information about your station
C	The FCC requires a log of all international contacts
D	The log provides evidence of operation needed to renew a license without retest

12. - G2E09

How do you join a contact between two stations using the PACTOR protocol?

Select	Answer
A	Send broadcast packets containing your call sign while in MONITOR mode
B	Send a NAK code
C	Transmit a steady carrier until the PACTOR protocol times out and disconnects
D	Joining an existing contact is not possible, PACTOR connections are limited to two stations

13. - G3A03

Approximately how long does it take the increased ultraviolet and X-ray radiation from a solar flare to affect radio propagation on Earth?

Select	Answer
A	28 days
B	1 to 2 hours
C	8 minutes
D	20 to 40 hours

14. - G3B04

Which of the following is a way to determine current propagation on a desired band from your station?

Select	Answer
A	All these choices are correct
B	Check the A-index
C	Send a series of dots and listen for echoes
D	Use a network of automated receiving stations on the internet to see where your transmissions are being received

15. - G3C06

What is a characteristic of HF scatter?

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

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 excessive audio level on strong signals
C	To reduce the transmitter power when driving a linear amplifier
D	To prevent receiver overload from strong incoming signals

17. - G4B02

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

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

18. - G4C05

What is a possible cause of high voltages that produce RF burns?

Select	Answer
A	Flat braid rather than round wire has been used for the ground wire
B	The ground wire has high impedance on that frequency
C	Insulated wire has been used for the ground wire
D	The ground rod is resonant

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 100 times more powerful
C	It is 20 times more powerful
D	It is 10 times less powerful

20. - G4E08

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

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

21. - G5A05

How does an inductor react to AC?

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

22. - G5B10

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

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

23. - G5C10

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

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

24. - G6A05

What is the approximate forward threshold voltage of a silicon junction diode?

Select	Answer
A	0.7 volts
B	1.0 volts
C	0.3 volts
D	0.1 volt

25. - G6B10

How does a ferrite bead or core reduce common-mode RF current on the shield of a coaxial cable?

Select	Answer
A	Ferrites expel magnetic fields
B	By creating an out-of-phase current to cancel the common-mode current
C	It converts common-mode current to differential mode current
D	By creating an impedance in the current’s path

26. - G7A13

Which symbol in Figure G7-1 represents a tapped inductor?

Select	Answer
A	Symbol 7
B	Symbol 6
C	Symbol 1
D	Symbol 11

27. - G7B02

Which of these classes of amplifiers has the highest efficiency?

Select	Answer
A	Class A
B	Class AB
C	Class B
D	Class C

28. - G7C03

What is one reason to use an impedance matching transformer at a transmitter output?

Select	Answer
A	To minimize transmitter power output
B	To minimize radiation resistance
C	To present the desired impedance to the transmitter and feed line
D	To reduce power supply ripple

29. - G8A11

What is the modulation envelope of an AM signal?

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

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	Mixer interference
C	Intermediate interference
D	Quadrature response

31. - G8C14

Which of the following describes a waterfall display?

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

32. - G9A10

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

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

33. - G9B07

How does the feed point impedance of a horizontal 1/2 wave dipole antenna change as the antenna height is reduced to 1/10 wavelength above ground?

Select	Answer
A	It steadily decreases
B	It steadily increases
C	It peaks at about 1/8 wavelength above ground
D	It is unaffected by the height above ground

34. - G9C01

Which of the following would increase the bandwidth of a Yagi antenna?

Select	Answer
A	Tapered-diameter elements
B	Closer element spacing
C	Loading coils in series with the element
D	Larger-diameter elements

35. - G9D06

Which of the following is an advantage of a log-periodic antenna?

Select	Answer
A	Higher gain per element than a Yagi antenna
B	Polarization diversity
C	Harmonic suppression
D	Wide bandwidth

Figure G7-1