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. - G0A11

What precaution should be taken if you install an indoor transmitting antenna?

Select	Answer
A	Position the antenna along the edge of a wall to reduce parasitic radiation
B	Make sure that MPE limits are not exceeded in occupied areas
C	Locate the antenna close to your operating position to minimize feed-line radiation
D	Make sure the antenna is properly shielded

2. - G0B10

Which of the following is a danger from lead-tin solder?

Select	Answer
A	Tin in the solder can “cold flow,” causing shorts in the circuit
B	Lead can contaminate food if hands are not washed carefully after handling the solder
C	RF energy can convert the lead into a poisonous gas
D	High voltages can cause lead-tin solder to disintegrate suddenly

3. - G1A08

Which HF bands have segments exclusively allocated to Amateur Extra licensees?

Select	Answer
A	80 meters, 40 meters, 20 meters, and 15 meters
B	60 meters, 30 meters, 17 meters, and 12 meters
C	All HF bands
D	All HF bands except 160 meters and 10 meters

4. - G1B03

Which of the following is a purpose of a beacon station as identified in the FCC rules?

Select	Answer
A	All these choices are correct
B	Transmission of bulletins of general interest to amateur radio licensees
C	Automatic identification of repeaters
D	Observation of propagation and reception

5. - G1C01

What is the maximum transmitter power an amateur station may use on 10.140 MHz?

Select	Answer
A	200 watts PEP output
B	1000 watts PEP output
C	2000 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	180 days
B	365 days
C	For as long as your current license is valid
D	30 days

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B	The third party’s amateur license has been revoked and not reinstated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. - G2A06

Which of the following is an advantage of using single sideband, as compared to other analog voice modes on the HF amateur bands?

Select	Answer
A	Very high-fidelity voice modulation
B	Less subject to interference from atmospheric static crashes
C	Less bandwidth used and greater power efficiency
D	Ease of tuning on receive and immunity to impulse noise

9. - G2B09

Who may be the control operator of an amateur station transmitting in RACES to assist relief operations during a disaster?

Select	Answer
A	Any control operator when normal communication systems are operational
B	Only a person holding an FCC-issued amateur operator license
C	Only a RACES net control operator
D	A person holding an FCC-issued amateur operator license or an appropriate government official

10. - G2C06

What does the term “zero beat” mean in CW operation?

Select	Answer
A	Sending without error
B	Operating split to avoid interference on frequency
C	Matching the speed of the transmitting station
D	Matching the transmit frequency to the frequency of a received signal

11. - G2D10

What is QRP operation?

Select	Answer
A	Traffic relay procedure net operation
B	Low-power transmit operation
C	Remote piloted model control
D	Transmission using Quick Response Protocol

12. - G2E01

Which mode is normally used when sending RTTY signals via AFSK with an SSB transmitter?

Select	Answer
A	LSB
B	DSB
C	CW
D	USB

13. - G3A13

What does the A-index measure?

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

14. - G3B05

How does the ionosphere affect radio waves with frequencies below the MUF and above the LUF?

Select	Answer
A	They are refracted back to Earth
B	They are amplified by interaction with the ionosphere
C	They pass through the ionosphere
D	They are refracted and trapped in the ionosphere to circle Earth

15. - G3C07

What makes HF scatter signals often sound distorted?

Select	Answer
A	Energy is scattered into the skip zone through several different paths
B	The E region is not present
C	Ground waves are absorbing much of the signal
D	The ionospheric region involved is unstable

16. - G4A07

What happens as a receiver’s noise reduction control level is increased?

Select	Answer
A	Received frequency may shift several kHz
B	Received frequency may become unstable
C	Received signals may become distorted
D	CW signals may become severely attenuated

17. - G4B05

Why do voltmeters have high input impedance?

Select	Answer
A	It improves the frequency response
B	It improves the resolution of the readings
C	It allows for higher voltages to be safely measured
D	It decreases the loading on circuits being measured

18. - G4C02

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

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

19. - G4D06

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

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

20. - G4E09

What is the approximate open-circuit voltage from a fully illuminated silicon photovoltaic cell?

Select	Answer
A	1.38 VDC
B	0.02 VDC
C	0.2 VDC
D	0.5 VDC

21. - G5A09

What unit is used to measure reactance?

Select	Answer
A	Farad
B	Ohm
C	Ampere
D	Siemens

22. - G5B06

What is the PEP produced by 200 volts peak-to-peak across a 50-ohm dummy load?

Select	Answer
A	353.5 watts
B	1.4 watts
C	100 watts
D	400 watts

23. - G5C10

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

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

24. - G6A12

What is the primary purpose of a screen grid in a vacuum tube?

Select	Answer
A	To reduce grid-to-plate capacitance
B	To increase efficiency
C	To increase the control grid resistance
D	To decrease plate resistance

25. - G6B08

How is an LED biased when emitting light?

Select	Answer
A	Forward biased
B	At the Zener voltage
C	In the tunnel-effect region
D	Reverse biased

26. - G7A11

Which symbol in figure G7-1 represents an NPN junction transistor?

Select	Answer
A	Symbol 11
B	Symbol 1
C	Symbol 2
D	Symbol 7

27. - G7B07

Which of the following are basic components of a sine wave oscillator?

Select	Answer
A	An amplifier and a divider
B	A filter and an amplifier operating in a feedback loop
C	A frequency multiplier and a mixer
D	A circulator and a filter operating in a feed-forward loop

28. - G7C10

What is an advantage of using I-Q modulation with software-defined radios (SDRs)?

Select	Answer
A	The need for high resolution analog-to-digital converters is eliminated
B	All types of modulation can be created with appropriate processing
C	Minimum detectible signal level is reduced
D	Automatic conversion of the signal from digital to analog

29. - G8A02

What is the name of the process that changes the phase angle of an RF signal to convey information?

Select	Answer
A	Phase transformation
B	Phase modulation
C	Phase inversion
D	Phase convolution

30. - G8B11

What combination of a mixer’s Local Oscillator (LO) and RF input frequencies is found in the output?

Select	Answer
A	The average
B	The sum and difference
C	The ratio
D	The arithmetic product

31. - G8C12

Which type of code is used for sending characters in a PSK31 signal?

Select	Answer
A	Volumetric
B	Binary
C	Viterbi
D	Varicode

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

33. - G9B03

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

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

34. - G9C12

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

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

35. - G9D01

Which of the following antenna types will be most effective as a near vertical incidence skywave (NVIS) antenna for short-skip communications on 40 meters during the day?

Select	Answer
A	A vertical antenna placed between 1/4 and 1/2 wavelength above the ground
B	A horizontal dipole placed between 1/10 and 1/4 wavelength above the ground
C	A horizontal dipole placed at approximately 1/2 wavelength above the ground
D	A vertical dipole placed at approximately 1/2 wavelength above the ground

Figure G7-1