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

2. - G0B07

Which of these choices should be observed when climbing a tower using a safety harness?

Select	Answer
A	Confirm that the harness is rated for the weight of the climber and that it is within its allowable service life
B	All these choices are correct
C	Always hold on to the tower with one hand
D	Ensure that all heavy tools are securely fastened to the harness

3. - G1A09

Which of the following frequencies is within the General class portion of the 15-meter band?

Select	Answer
A	24900 kHz
B	21300 kHz
C	18155 kHz
D	14250 kHz

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. - G1C02

What is the maximum transmitter power an amateur station may use on the 12-meter band?

Select	Answer
A	200 watts PEP output
B	An effective radiated power equivalent to 100 watts from a half-wave dipole
C	50 watts PEP output
D	1500 watts PEP output

6. - G1D06

Until an upgrade to General class is shown in the FCC database, when must a Technician licensee identify with “AG” after their call sign?

Select	Answer
A	A special identifier is not required if their General class license application has been filed with the FCC
B	Whenever they operate using Technician frequency privileges
C	Whenever they operate using General class frequency privileges
D	Whenever they operate on any amateur frequency

7. - G1E01

Which of the following would disqualify a third party from participating in sending a message via an amateur station?

Select	Answer
A	All these choices are correct
B	The third party’s amateur license has been revoked and not reinstated
C	The third party is speaking in a language other than English
D	The third party is not a US citizen

8. - G2A07

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

Select	Answer
A	Only one sideband is transmitted; the other sideband and carrier are suppressed
B	Only one sideband and the carrier are transmitted; the other sideband is suppressed
C	SSB is the only voice mode authorized on the 20-, 15-, and 10-meter amateur bands
D	SSB is the only voice mode authorized on the 160-, 75-, and 40-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 contacts with stations not within the 48 contiguous states
B	Only contacts with other stations within the 48 contiguous states
C	Only digital contacts
D	Only SSTV contacts

10. - G2C09

What does the Q signal “QSL” mean?

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

11. - G2D11

Why are signal reports typically exchanged at the beginning of an HF contact?

Select	Answer
A	To allow each station to calibrate their frequency display
B	To be sure the contact will count for award programs
C	To allow each station to operate according to conditions
D	To follow standard radiogram structure

12. - G2E04

Which of the following is good practice when choosing a transmitting frequency to answer a station calling CQ using FT8?

Select	Answer
A	Find a clear frequency during the alternate time slot to the calling station
B	Always call on the station’s frequency
C	Find a clear frequency during the same time slot as the calling station
D	Call on any frequency in the waterfall except the station’s frequency

13. - G3A08

How can a geomagnetic storm affect HF propagation?

Select	Answer
A	Improve high-latitude HF propagation
B	Degrade high-latitude HF propagation
C	Improve ground wave propagation
D	Degrade ground wave propagation

14. - G3B11

What happens to HF propagation when the LUF exceeds the MUF?

Select	Answer
A	Propagation over the path on all HF frequencies is enhanced
B	Propagation via ordinary skywave communications is not possible over that path
C	HF communications over the path are enhanced
D	Double-hop propagation along the path is more common

15. - G3C06

What is a characteristic of HF scatter?

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

16. - G4A01

What is the purpose of the notch filter found on many HF transceivers?

Select	Answer
A	To reduce interference from carriers in the receiver passband
B	To eliminate receiver interference from impulse noise sources
C	To restrict the transmitter voice bandwidth
D	To remove interfering splatter generated by signals on adjacent frequencies

17. - G4B07

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

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

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	Insulated wire has been used for the ground wire
C	The ground rod is resonant
D	The ground wire has high impedance on that frequency

19. - G4D04

What does an S meter measure?

Select	Answer
A	Impedance
B	Received signal strength
C	Carrier suppression
D	Transmitter power output

20. - G4E10

Why should a series diode be connected between a solar panel and a storage battery that is being charged by the panel?

Select	Answer
A	To prevent overload by regulating the charging voltage
B	To prevent discharge of the battery through the panel during times of low or no illumination
C	To limit the current flowing from the panel to a safe value
D	To prevent damage to the battery due to excessive voltage at high illumination levels

21. - G5A01

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

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

22. - G5B03

How many watts of electrical power are consumed if 400 VDC is supplied to an 800-ohm load?

Select	Answer
A	3200 watts
B	400 watts
C	0.5 watts
D	200 watts

23. - G5C13

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

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

24. - G6A09

Which of the following describes MOSFET construction?

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

25. - G6B10

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

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

26. - G7A12

Which symbol in Figure G7-1 represents a solid core transformer?

Select	Answer
A	Symbol 7
B	Symbol 1
C	Symbol 6
D	Symbol 4

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	AM
C	SSB
D	All these choices are correct

28. - G7C14

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

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

29. - G8A03

What is the name of the process that changes the instantaneous frequency of an RF wave to convey information?

Select	Answer
A	Frequency transformation
B	Frequency modulation
C	Frequency conversion
D	Frequency convolution

30. - G8B07

What is the frequency deviation for a 12.21 MHz reactance modulated oscillator in a 5 kHz deviation, 146.52 MHz FM phone transmitter?

Select	Answer
A	60 kHz
B	101.75 Hz
C	416.7 Hz
D	5 kHz

31. - G8C03

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

Select	Answer
A	Trailer
B	Directory
C	Preamble
D	Header

32. - G9A02

What is the relationship between high standing wave ratio (SWR) and transmission line loss?

Select	Answer
A	There is no relationship between transmission line loss and SWR
B	High SWR increases loss in a lossy transmission line
C	High SWR makes it difficult to measure transmission line loss
D	High SWR reduces the relative effect of transmission line loss

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. - G9C03

How do the lengths of a three-element Yagi reflector and director compare to that of the driven element?

Select	Answer
A	The reflector is shorter, and the director is longer
B	The reflector is longer, and the director is shorter
C	Relative length depends on the frequency of operation
D	They are all the same length

35. - G9D08

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

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

Figure G7-1