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. - G0A06

What must you do if your station fails to meet the FCC RF exposure exemption criteria?

Select	Answer
A	Perform an RF exposure evaluation in accordance with World Meteorological Organization guidelines
B	Perform an RF Exposure Evaluation in accordance with FCC OET Bulletin 65
C	Use an FCC-approved band-pass filter
D	Contact the FCC for permission to transmit

2. - G0B12

What is the purpose of a power supply interlock?

Select	Answer
A	To prevent unauthorized changes to the circuit that would void the manufacturer’s warranty
B	To shut down the unit if it becomes too hot
C	To shut off the power supply if too much voltage is produced
D	To ensure that dangerous voltages are removed if the cabinet is opened

3. - G1A03

On which of the following bands is image transmission prohibited?

Select	Answer
A	160 meters
B	20 meters
C	12 meters
D	30 meters

4. - G1B08

When is it permissible to communicate with amateur stations in countries outside the areas administered by the Federal Communications Commission?

Select	Answer
A	When the contact is with amateurs in any country except those whose administrations have notified the ITU that they object to such communications
B	Only when the contact is with amateurs licensed by a country which is a member of the United Nations, or by a territory possessed by such a country
C	Only when the foreign country has a formal third-party agreement filed with the FCC
D	Only when the contact is with amateurs licensed by a country which is a member of the International Amateur Radio Union, or by a territory possessed by such a country

5. - G1C05

What is the limit for transmitter power on the 28 MHz band for a General Class control operator?

Select	Answer
A	2000 watts PEP output
B	100 watts PEP output
C	1500 watts PEP output
D	1000 watts PEP output

6. - G1D04

Who must observe the administration of a Technician class license examination?

Select	Answer
A	At least three Volunteer Examiners of General class or higher
B	At least two Volunteer Examiners of General class or higher
C	At least three Volunteer Examiners of Technician class
D	At least two Volunteer Examiners of Technician class or higher

7. - G1E07

In what part of the 2.4 GHz band may an amateur station communicate with non-licensed Wi-Fi stations?

Select	Answer
A	No part
B	Anywhere in the band
C	Channels 1 through 4
D	Channels 42 through 45

8. - G2A11

Generally, who should respond to a station in the contiguous 48 states calling “CQ DX”?

Select	Answer
A	Any stations outside the lower 48 states
B	Only contest stations
C	Only stations in Germany
D	Any caller is welcome to respond

9. - G2B01

Which of the following is true concerning access to frequencies?

Select	Answer
A	Contest operations should yield to non-contest use of frequencies
B	Nets have priority
C	QSOs in progress have priority
D	Except during emergencies, no amateur station has priority access to any frequency

10. - G2C09

What does the Q signal “QSL” mean?

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

11. - G2D09

Which of the following is required when participating in a contest on HF frequencies?

Select	Answer
A	Identify your station according to normal FCC regulations
B	All these choices are correct
C	Send a QSL card to the stations worked, or QSL via Logbook of The World
D	Submit a log to the contest sponsor

12. - G2E02

What is VARA?

Select	Answer
A	A low signal-to-noise digital mode used for EME (moonbounce)
B	A radio direction finding system used on VHF and UHF
C	A digital protocol used with Winlink
D	A DX spotting system using a network of software defined radios

13. - G3A12

What does the K-index measure?

Select	Answer
A	The short-term stability of the Sun’s magnetic field
B	The short-term stability of Earth’s geomagnetic field
C	The relative position of sunspots on the surface of the Sun
D	The solar radio flux at Boulder, Colorado

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	2,500 miles
C	12,000 miles
D	180 miles

15. - G3C06

What is a characteristic of HF scatter?

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

16. - G4A11

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

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

17. - G4B13

Which of the following can be measured with an antenna analyzer?

Select	Answer
A	Gain of a directional antenna
B	Impedance of coaxial cable
C	Power output from a transmitter
D	Front-to-back ratio of an antenna

18. - G4C02

Which of the following could be a cause of interference covering a wide range of frequencies?

Select	Answer
A	Lack of rectification of the transmitter’s signal in power conductors
B	Using a balun to feed an unbalanced antenna
C	Not using a balun or line isolator to feed balanced antennas
D	Arcing at a poor electrical connection

19. - G4D06

How much change in signal strength is typically represented by one S unit?

Select	Answer
A	18 dB
B	12 dB
C	6 dB
D	15 dB

20. - G4E07

Which of the following may cause receive interference to an HF transceiver installed in a vehicle?

Select	Answer
A	The control computers
B	The fuel delivery system
C	All these choices are correct
D	The battery charging system

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

22. - G5B09

What is the RMS voltage of a sine wave with a value of 17 volts peak?

Select	Answer
A	8.5 volts
B	24 volts
C	12 volts
D	34 volts

23. - G5C10

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

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

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. - G6B07

Which of the following describes a type N connector?

Select	Answer
A	A low noise figure VHF connector
B	A nickel plated version of the PL-259
C	A small bayonet connector used for data circuits
D	A moisture-resistant RF connector useful to 10 GHz

26. - G7A03

Which type of rectifier circuit uses two diodes and a center-tapped transformer?

Select	Answer
A	Synchronous
B	Full-wave bridge
C	Full-wave
D	Half-wave

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. - G7C12

What is the frequency above which a low-pass filter’s output power is less than half the input power?

Select	Answer
A	Notch frequency
B	Neper frequency
C	Cutoff frequency
D	Rolloff frequency

29. - G8A11

What is the modulation envelope of an AM signal?

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

30. - G8B05

Which intermodulation products are closest to the original signal frequencies?

Select	Answer
A	Even-order
B	Intercept point
C	Odd-order
D	Second harmonics

31. - G8C16

Which of the following provide digital voice modes?

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

32. - G9A04

What causes reflected power at an antenna’s feed point?

Select	Answer
A	Feeding the antenna with unbalanced feed line
B	A difference between feed line impedance and antenna feed point impedance
C	Using more transmitter power than the antenna can handle
D	Operating an antenna at its resonant frequency

33. - G9B03

Which of the following best describes the radiation pattern of a quarter-wave ground-plane vertical antenna?

Select	Answer
A	Hemispherical
B	Isotropic
C	Omnidirectional in azimuth
D	Bi-directional in azimuth

34. - G9C07

What does “front-to-back ratio” mean in reference to a Yagi antenna?

Select	Answer
A	The number of directors versus the number of reflectors
B	The relative position of the driven element with respect to the reflectors and directors
C	The ratio of forward gain to dipole gain
D	The power radiated in the major lobe compared to that in the opposite direction

35. - G9D09

What is the primary use of a Beverage antenna?

Select	Answer
A	Portable direction finding at higher HF frequencies
B	Directional receiving for MF and low HF bands
C	Directional transmitting for low HF bands
D	Portable direction finding at lower HF frequencies