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. - G0A01

What is one way that RF energy can affect human body tissue?

Select	Answer
A	It heats body tissue
B	It causes the blood count to reach a dangerously low level
C	It cools body tissue
D	It causes radiation poisoning

2. - G0B13

Where should lightning arrestors be located?

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

3. - G1A04

Which of the following amateur bands is restricted to communication only on specific channels, rather than frequency ranges?

Select	Answer
A	11 meters
B	30 meters
C	12 meters
D	60 meters

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 ITU
B	The IEEE
C	The control operator
D	The FCC

5. - G1C06

What is the limit for transmitter power on the 1.8 MHz band?

Select	Answer
A	1000 watts PEP output
B	1200 watts PEP output
C	200 watts PEP output
D	1500 watts PEP output

6. - G1D09

How long is a Certificate of Successful Completion of Examination (CSCE) valid for exam element credit?

Select	Answer
A	For as long as your current license is valid
B	180 days
C	365 days
D	30 days

7. - G1E06

The frequency allocations of which ITU region apply to radio amateurs operating in North and South America?

Select	Answer
A	Region 1
B	Region 3
C	Region 4
D	Region 2

8. - G2A10

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

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

9. - G2B11

How often may RACES training drills and tests be routinely conducted without special authorization?

Select	Answer
A	No more than 2 hours per month
B	No more than 2 hours per week
C	No more than 1 hour per month
D	No more than 1 hour per week

10. - G2C08

What prosign is sent to indicate the end of a formal message when using CW?

Select	Answer
A	AR
B	BK
C	KN
D	SK

11. - G2D02

Which of the following are objectives of the Volunteer Monitor Program?

Select	Answer
A	To conduct efficient and orderly amateur licensing examinations
B	To provide emergency and public safety communications
C	To encourage amateur radio operators to self-regulate and comply with the rules
D	To coordinate repeaters for efficient and orderly spectrum usage

12. - G2E15

Which of the following is a common location for FT8?

Select	Answer
A	Anywhere in the voice portion of the band
B	Approximately 14.074 MHz to 14.077 MHz
C	Anywhere in the CW portion of the band
D	Approximately 14.110 MHz to 14.113 MHz

13. - G3A04

Which of the following are the least reliable bands for long-distance communications during periods of low solar activity?

Select	Answer
A	30 meters and 20 meters
B	60 meters and 40 meters
C	80 meters and 160 meters
D	15 meters, 12 meters, and 10 meters

14. - G3B10

What is the approximate maximum distance along the Earth’s surface normally covered in one hop using the E region?

Select	Answer
A	1,200 miles
B	180 miles
C	2,500 miles
D	12,000 miles

15. - G3C10

What is near vertical incidence skywave (NVIS) propagation?

Select	Answer
A	Short distance MF or HF propagation at high elevation angles
B	Propagation near the MUF
C	Long path HF propagation at sunrise and sunset
D	Double hop propagation near the LUF

16. - G4A04

What is the effect on plate current of the correct setting of a vacuum-tube RF power amplifier’s TUNE control?

Select	Answer
A	A slow, rhythmic oscillation
B	A pronounced dip
C	No change will be observed
D	A pronounced peak

17. - G4B04

What signal source is connected to the vertical input of an oscilloscope when checking the RF envelope pattern of a transmitted signal?

Select	Answer
A	The attenuated RF output of the transmitter
B	The local oscillator of the transmitter
C	The transmitter balanced mixer output
D	An external RF oscillator

18. - G4C08

Which of the following would reduce RF interference caused by common-mode current on an audio cable?

Select	Answer
A	Connect the center conductor to the shield of all cables to short circuit the RFI signal
B	Add an additional insulating jacket to the cable
C	Place a ferrite choke on the cable
D	Ground the center conductor of the audio cable causing the interference

19. - G4D02

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

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

20. - G4E05

Which of the following most limits an HF mobile installation?

Select	Answer
A	Efficiency of the electrically short antenna
B	FCC rules limiting mobile output power on the 75-meter band
C	The wire gauge of the DC power line to the transceiver
D	“Picket fencing”

21. - G5A07

What is the term for the inverse of impedance?

Select	Answer
A	Reluctance
B	Susceptance
C	Admittance
D	Conductance

22. - G5B02

How does the total current relate to the individual currents in a circuit of parallel resistors?

Select	Answer
A	It is the sum of the reciprocal of each individual voltage drop
B	It equals the sum of the currents through each branch
C	It decreases as more parallel branches are added to the circuit
D	It equals the average of the branch currents

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. - G6A05

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

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

25. - G6B12

Which of these connector types is commonly used for low frequency or dc signal connections to a transceiver?

Select	Answer
A	PL-259
B	BNC
C	RCA Phono
D	Type N

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. - G7B09

What determines the frequency of an LC oscillator?

Select	Answer
A	The number of stages in the divider
B	The time delay of the lag circuit
C	The inductance and capacitance in the tank circuit
D	The number of stages in the counter

28. - G7C05

Which of the following is characteristic of a direct digital synthesizer (DDS)?

Select	Answer
A	Extremely narrow tuning range
B	Variable output frequency with the stability of a crystal oscillator
C	Pure sine wave output
D	Relatively high-power output

29. - G8A14

What is link margin?

Select	Answer
A	Transmit power minus receiver sensitivity
B	The opposite of fade margin
C	The difference between received power level and minimum required signal level at the input to the receiver
D	Receiver sensitivity plus 3 dB

30. - G8B08

Why is it important to know the duty cycle of the mode you are using when transmitting?

Select	Answer
A	To aid in tuning your transmitter
B	To allow time for the other station to break in during a transmission
C	To prevent overmodulation
D	Some modes have high duty cycles that could exceed the transmitter’s average power rating

31. - G8C16

Which of the following provide digital voice modes?

Select	Answer
A	Winlink, PACTOR II, and PACTOR III
B	DMR, D-STAR, and SystemFusion
C	WSPR, MFSK16, and EasyPAL
D	FT8, FT4, and FST4

32. - G9A09

What standing wave ratio results from connecting a 50-ohm feed line to a 200-ohm resistive load?

Select	Answer
A	4:1
B	1:2
C	1:4
D	2:1

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 peaks at about 1/8 wavelength above ground
C	It steadily increases
D	It is unaffected by the height above ground

34. - G9C12

Which of the following is a characteristic of using a gamma match with a Yagi antenna?

Select	Answer
A	It does not require the driven element to be insulated from the boom
B	It does not require any inductors or capacitors
C	It is useful for matching multiband antennas
D	All these choices are correct

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