US Amateur Radio - General (Element 3, 2015-2019) Practice Test

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US Amateur Radio - General (Element 3, 2015-2019) Practice Test

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1. - G1A10

Which of the following frequencies is available to a control operator holding a General Class license?

Select	Answer
A	28.020 MHz
B	28.350 MHz
C	All of these choices are correct
D	28.550 MHz

2. - G1B07

What are the restrictions on the use of abbreviations or procedural signals in the Amateur Service?

Select	Answer
A	Only "Q" signals are permitted
B	They are not permitted
C	Only "10 codes" are permitted
D	They may be used if they do not obscure the meaning of a message

3. - G1C01

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

Select	Answer
A	200 watts PEP output
B	1000 watts PEP output
C	1500 watts PEP output
D	2000 watts PEP output

4. - G1D10

What is the minimum age that one must be to qualify as an accredited Volunteer Examiner?

Select	Answer
A	12 years
B	18 years
C	There is no age limit
D	21 years

5. - G1E06

Which of the following applies in the event of interference between a coordinated repeater and an uncoordinated repeater?

Select	Answer
A	The frequency coordinator bears primary responsibility to resolve the interference
B	The licensee of the coordinated repeater has primary responsibility to resolve the interference
C	Both repeater licensees share equal responsibility to resolve the interference
D	The licensee of the uncoordinated repeater has primary responsibility to resolve the interference

6. - G2A07

Which of the following statements is true of the single sideband voice mode?

Select	Answer
A	Only one sideband and the carrier are transmitted; the other sideband is suppressed
B	SSB is the only voice mode that is authorized on the 20-meter, 15-meter, and 10-meter amateur bands
C	SSB is the only voice mode that is authorized on the 160-meter, 75-meter and 40-meter amateur bands
D	Only one sideband is transmitted; the other sideband and carrier are suppressed

7. - G2B06

What is a practical way to avoid harmful interference on an apparently clear frequency before calling CQ on CW or phone?

Select	Answer
A	Listen for 2 minutes before calling CQ
B	Send the letter "V" in Morse code several times and listen for a response or say "test" several times and listen for a response
C	Send "QRL?" on CW, followed by your call sign; or, if using phone, ask if the frequency is in use, followed by your call sign
D	Send "QSY" on CW or if using phone, announce "the frequency is in use", then give your call and listen for a response

8. - G2C11

What does the Q signal "QRV" mean?

Select	Answer
A	There is interference on the frequency
B	I am quitting for the day
C	I am ready to receive messages
D	You are sending too fast

9. - G2D02

Which of the following are objectives of the Amateur Auxiliary?

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

10. - G2E03

What symptoms may result from other signals interfering with a PACTOR or WINMOR transmission?

Select	Answer
A	Long pauses in message transmission
B	Frequent retries or timeouts
C	All of these choices are correct
D	Failure to establish a connection between stations

11. - G3A01

What is the significance of the sunspot number with regard to HF propagation?

Select	Answer
A	Lower sunspot numbers generally indicate greater probability of sporadic E propagation
B	Higher sunspot numbers generally indicate a greater probability of good propagation at higher frequencies
C	A zero sunspot number indicate radio propagation is not possible on any band
D	All of these choices are correct.

12. - G3B04

What is a reliable way to determine if the MUF is high enough to support skip propagation between your station and a distant location on frequencies between 14 and 30 MHz?

Select	Answer
A	Check the strength of TV signals from Western Europe
B	Send a series of dots on the band and listen for echoes from your signal
C	Check the strength of signals in the MF AM broadcast band
D	Listen for signals from an international beacon in the frequency range you plan to use

13. - G3C01

Which ionospheric layer is closest to the surface of the Earth?

Select	Answer
A	The D layer
B	The F2 layer
C	The E layer
D	The F1 layer

14. - G4A07

What condition can lead to permanent damage to a solid-state RF power amplifier?

Select	Answer
A	Excessive drive power
B	Insufficient drive power
C	Low input SWR
D	Shorting the input signal to ground

15. - 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

16. - G4C03

What sound is heard from an audio device or telephone if there is interference from a nearby single sideband phone transmitter?

Select	Answer
A	On-and-off humming or clicking
B	A steady hum whenever the transmitter is on the air
C	Distorted speech
D	Clearly audible speech

17. - G4D04

What does an S meter measure?

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

18. - G4E08

What is the name of the process by which sunlight is changed directly into electricity?

Select	Answer
A	Photon decomposition
B	Photosynthesis
C	Photovoltaic conversion
D	Photon emission

19. - G5A09

What unit is used to measure reactance?

Select	Answer
A	Siemens
B	Ohm
C	Ampere
D	Farad

20. - G5B01

What dB change represents a two-times increase or decrease in power?

Select	Answer
A	Approximately 6 dB
B	Approximately 12 dB
C	Approximately 2 dB
D	Approximately 3 dB

21. - G5C14

Which of the following components should be added to an inductor to increase the inductance?

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

22. - G6A12

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

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

23. - G6B09

Which of the following is a characteristic of a liquid crystal display?

Select	Answer
A	It requires ambient or back lighting
B	It offers a wide dynamic range
C	It has a wide viewing angle
D	All of these choices are correct

24. - G7A04

What is the peak-inverse-voltage across the rectifier in a half-wave power supply?

Select	Answer
A	Equal to the normal output voltage of the power supply
B	One-half the normal output voltage of the power supply
C	One-half the normal peak output voltage of the power supply
D	Two times the normal peak output voltage of the power supply

25. - G7B08

How is the efficiency of an RF power amplifier determined?

Select	Answer
A	Add the RF input power to the DC output power
B	Divide the DC input power by the DC output power
C	Multiply the RF input power by the reciprocal of the RF output power
D	Divide the RF output power by the DC input power

26. - G7C11

What is meant by the term "software defined radio" (SDR)?

Select	Answer
A	A radio that provides computer interface for automatic logging of band and frequency
B	A radio that uses crystal filters designed using software
C	A radio in which most major signal processing functions are performed by software
D	A computer model that can simulate performance of a radio to aid in the design process

27. - G8A02

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

Select	Answer
A	Phase modulation
B	Phase convolution
C	Radian inversion
D	Angle convolution

28. - G8B03

What is another term for the mixing of two RF signals?

Select	Answer
A	Heterodyning
B	Cancellation
C	Phase inverting
D	Synthesizing

29. - G8C01

Which of the following digital modes is designed to operate at extremely low signal strength on the HF bands?

Select	Answer
A	FSK441 and Hellschreiber
B	Clover
C	JT9 and JT65
D	RTTY

30. - G9A06

In what units is RF feed line loss usually expressed?

Select	Answer
A	Ohms per 1000 feet
B	Decibels per 100 feet
C	Ohms per 100 feet
D	Decibels per 1000 feet

31. - G9B02

Which of the following is a common way to adjust the feed point impedance of a quarter wave ground plane vertical antenna to be approximately 50 ohms?

Select	Answer
A	Lengthen the radials
B	Slope the radials downward
C	Slope the radials upward
D	Shorten the radials

32. - G9C09

How does the gain of two 3-element horizontally polarized Yagi antennas spaced vertically 1/2 wavelength apart typically compare to the gain of a single 3-element Yagi?

Select	Answer
A	Approximately 3 dB higher
B	Approximately 1.5 dB higher
C	Approximately 9 dB higher
D	Approximately 6 dB higher

33. - G9D10

Which of the following describes a Beverage antenna?

Select	Answer
A	A broad-band mobile antenna
B	A very long and low directional receiving antenna
C	A vertical antenna
D	A helical antenna for space reception

34. - G0A07

What effect does transmitter duty cycle have when evaluating RF exposure?

Select	Answer
A	A lower transmitter duty cycle permits greater short-term exposure levels
B	A higher transmitter duty cycle permits greater short-term exposure levels
C	High duty cycle transmitters are exempt from RF exposure requirements
D	Low duty cycle transmitters are exempt from RF exposure evaluation requirements

35. - G0B12

What is the purpose of a power supply interlock?

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