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. - G0A09

What type of instrument can be used to accurately measure an RF field strength?

Select	Answer
A	A calibrated field strength meter with a calibrated antenna
B	An SWR meter with a peak-reading function
C	An oscilloscope with a high-stability crystal marker generator
D	A receiver with digital signal processing (DSP) noise reduction

2. - G0B03

Which size of fuse or circuit breaker would be appropriate to use with a circuit that uses AWG number 14 wiring?

Select	Answer
A	15 amperes
B	30 amperes
C	20 amperes
D	25 amperes

3. - G1A06

Which of the following applies when the FCC rules designate the amateur service as a secondary user on a band?

Select	Answer
A	Amateur stations may only operate during specific hours of the day, while primary users are permitted 24-hour use of the band
B	Amateur stations may use the band only during emergencies
C	Amateur stations must not cause harmful interference to primary users and must accept interference from primary users
D	Amateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station

4. - G1B01

What is the maximum height above ground for an antenna structure not near a public use airport without requiring notification to the FAA and registration with the FCC?

Select	Answer
A	250 feet
B	100 feet
C	200 feet
D	50 feet

5. - G1C02

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

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

6. - G1D05

When operating a US station by remote control from outside the country, what license is required of the control operator?

Select	Answer
A	Only a license from the foreign country, as long as the call sign includes identification of portable operation in the US
B	A US operator/primary station license
C	A license from the foreign country and a special remote station permit from the FCC
D	Only an appropriate US operator/primary license and a special remote station permit from the FCC

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 not a US citizen
D	The third party is speaking in a language other than English

8. - G2A02

Which mode is most commonly used for voice communications on the 160-, 75-, and 40-meter bands?

Select	Answer
A	Double sideband
B	Suppressed sideband
C	Lower sideband
D	Upper sideband

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. - G2C09

What does the Q signal “QSL” mean?

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

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	Compare signal strengths between the input and output of the repeater
B	All these choices are correct
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. - G2E13

What is another name for a Winlink Remote Message Server?

Select	Answer
A	Terminal Node Controller
B	RJ-45
C	Printer/Server
D	Gateway

13. - G3A14

How is long distance radio communication usually affected by the charged particles that reach Earth from solar coronal holes?

Select	Answer
A	HF communication is disturbed
B	HF communication is improved
C	VHF/UHF ducting is disturbed
D	VHF/UHF ducting is improved

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

15. - G3C05

Why is long-distance communication on the 40-, 60-, 80-, and 160-meter bands more difficult during the day?

Select	Answer
A	The E region is unstable during daylight hours
B	The F region is unstable during daylight hours
C	The F region absorbs signals at these frequencies during daylight hours
D	The D region absorbs signals at these frequencies during daylight hours

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	No change will be observed
B	A slow, rhythmic oscillation
C	A pronounced dip
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 transmitter balanced mixer output
B	The local oscillator of the transmitter
C	An external RF oscillator
D	The attenuated RF output of the transmitter

18. - G4C11

What technique helps to minimize RF “hot spots” in an amateur station?

Select	Answer
A	Bonding all equipment enclosures together
B	Using surge suppressor power outlets
C	Building all equipment in a metal enclosure
D	Placing low-pass filters on all feed lines

19. - G4D03

What is the effect of an incorrectly adjusted speech processor?

Select	Answer
A	Excessive background noise
B	Excess intermodulation products
C	Distorted speech
D	All these choices are correct

20. - G4E01

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

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

21. - G5A01

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

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

22. - G5B11

What is the ratio of PEP to average power for an unmodulated carrier?

Select	Answer
A	0.707
B	1.00
C	1.414
D	2.00

23. - G5C07

What transformer turns ratio matches an antenna’s 600-ohm feed point impedance to a 50-ohm coaxial cable?

Select	Answer
A	3.5 to 1
B	144 to 1
C	12 to 1
D	24 to 1

24. - G6A10

Which element of a vacuum tube regulates the flow of electrons between cathode and plate?

Select	Answer
A	Control grid
B	Screen grid
C	Trigger electrode
D	Suppressor grid

25. - G6B01

What determines the performance of a ferrite core at different frequencies?

Select	Answer
A	Its conductivity
B	The ratio of outer diameter to inner diameter
C	The composition, or “mix,” of materials used
D	Its thickness

26. - G7A08

Which of the following is characteristic of a switchmode power supply as compared to a linear power supply?

Select	Answer
A	Faster switching time makes higher output voltage possible
B	High-frequency operation allows the use of smaller components
C	Inherently more stable
D	Fewer circuit components are required

27. - G7B09

What determines the frequency of an LC oscillator?

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

28. - G7C01

What circuit is used to select one of the sidebands from a balanced modulator?

Select	Answer
A	Filter
B	IF amplifier
C	Carrier oscillator
D	RF amplifier

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 convolution
B	Frequency transformation
C	Frequency modulation
D	Frequency conversion

30. - G8B13

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

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

31. - G8C11

How are the two separate frequencies of a Frequency Shift Keyed (FSK) signal identified?

Select	Answer
A	On and off
B	High and low
C	Mark and space
D	Dot and dash

32. - G9A11

What is the effect of transmission line loss on SWR measured at the input to the line?

Select	Answer
A	Higher loss increases the accuracy of SWR measured at the input to the line
B	Higher loss increases SWR measured at the input to the line
C	Transmission line loss does not affect the SWR measurement
D	Higher loss reduces SWR measured at the input to the line

33. - G9B06

Where should the radial wires of a ground-mounted vertical antenna system be placed?

Select	Answer
A	On the surface or buried a few inches below the ground
B	As high as possible above the ground
C	Parallel to the antenna element
D	At the center of the antenna

34. - G9C04

How does antenna gain in dBi compare to gain stated in dBd for the same antenna?

Select	Answer
A	Gain in dBi is 2.15 dB higher
B	Gain in dBd is 1.25 dBd higher
C	Gain in dBd is 1.25 dBd lower
D	Gain in dBi is 2.15 dB lower

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 its body capacitance
D	By varying the base loading inductance