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. - G1A04

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

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

2. - G1B06

When is an amateur station permitted to transmit secret codes?

Select	Answer
A	During a declared communications emergency
B	Only with Special Temporary Authorization from the FCC
C	To control a space station
D	Only when the information is of a routine, personal nature

3. - G1C02

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

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

4. - G1D02

What license examinations may you administer when you are an accredited VE holding a General Class operator license?

Select	Answer
A	Technician only
B	General and Technician
C	General only
D	Extra, General and Technician

5. - G1E12

Under what circumstances are messages that are sent via digital modes exempt from Part 97 third party rules that apply to other modes of communication?

Select	Answer
A	When messages are encrypted
B	Under no circumstances
C	When messages are not encrypted
D	When under automatic control

6. - G2A10

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

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

7. - G2B01

Which of the following is true concerning access to frequencies in non-emergency situations?

Select	Answer
A	Nets always have priority
B	Contest operations must always yield to non-contest use of frequencies
C	Except during FCC declared emergencies, no one has priority access to frequencies
D	QSOs in progress always have priority

8. - G2C03

What does it mean when a CW operator sends "KN" at the end of a transmission?

Select	Answer
A	Closing station now
B	Operating full break-in
C	Listening for novice stations
D	Listening only for a specific station or stations

9. - G2D01

What is the Amateur Auxiliary to the FCC?

Select	Answer
A	Amateur volunteers who conduct frequency coordination for amateur VHF repeaters
B	Amateur volunteers who are formally enlisted to monitor the airwaves for rules violations
C	Amateur volunteers who use their station equipment to help civil defense organizations in times of emergency
D	Amateur volunteers who conduct amateur licensing examinations

10. - G2E02

How can a PACTOR modem or controller be used to determine if the channel is in use by other PACTOR stations?

Select	Answer
A	Transmit UI packets several times and wait to see if there is a response from another PACTOR station
B	Put the modem or controller in a mode which allows monitoring communications without a connection
C	Send the message: "Is this frequency in use?"
D	Unplug the data connector temporarily and see if the channel-busy indication is turned off

11. - G3A10

What causes HF propagation conditions to vary periodically in a 28 day cycle?

Select	Answer
A	The Sun's rotation on its axis
B	Long term oscillations in the upper atmosphere
C	Cyclic variation in the Earth's radiation belts
D	The position of the Moon in its orbit

12. - G3B08

What does MUF stand for?

Select	Answer
A	The Maximum Usable Frequency during a 24 hour period
B	The Minimum Usable Frequency for communications between two points
C	The Maximum Usable Frequency for communications between two points
D	The Minimum Usable Frequency during a 24 hour period

13. - G3C04

What does the term "critical angle" mean as used in radio wave propagation?

Select	Answer
A	The lowest takeoff angle that will return a radio wave to the Earth under specific ionospheric conditions
B	The short path azimuth of a distant station
C	The highest takeoff angle that will return a radio wave to the Earth under specific ionospheric conditions
D	The long path azimuth of a distant station

14. - G4A09

Why is a time delay sometimes included in a transmitter keying circuit?

Select	Answer
A	To allow the transmitter power regulators to charge properly
B	To prevent stations from interfering with one another
C	To allow time for transmit-receive changeover operations to complete properly before RF output is allowed
D	To allow time for a warning signal to be sent to other stations

15. - G4B02

Which of the following is an advantage of an oscilloscope versus a digital voltmeter?

Select	Answer
A	Complex impedances can be easily measured
B	An oscilloscope uses less power
C	Complex waveforms can be measured
D	Input impedance is much lower

16. - G4C04

What is the effect on an audio device or telephone system if there is interference from a nearby CW transmitter?

Select	Answer
A	A chirpy CW signal
B	Severely distorted audio
C	A CW signal at a nearly pure audio frequency
D	On-and-off humming or clicking

17. - G4D09

What frequency range is occupied by a 3 kHz USB signal with the displayed carrier frequency set to 14.347 MHz?

Select	Answer
A	14.347 to 14.647 MHz
B	14.3455 to 14.3485 MHz
C	14.347 to 14.350 MHz
D	14.344 to 14.347 MHz

18. - G4E04

Why is it best NOT to draw the DC power for a 100 watt HF transceiver from a vehicle's auxiliary power socket?

Select	Answer
A	The socket's wiring may be inadequate for the current drawn by the transceiver
B	The DC polarity of the socket is reversed from the polarity of modern HF transceivers
C	Drawing more than 50 watts from this socket could cause the engine to overheat
D	The socket is not wired with an RF-shielded power cable

19. - G5A12

What is one reason to use an impedance matching transformer?

Select	Answer
A	To minimize radiation resistance
B	To minimize transmitter power output
C	To reduce power supply ripple
D	To maximize the transfer of power

20. - G5B09

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

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

21. - G5C10

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

Select	Answer
A	3.3 millihenrys
B	30 millihenrys
C	3.3 henrys
D	0.30 henrys

22. - G6A05

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

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

23. - G6B10

What two devices in an Amateur Radio station might be connected using a USB interface?

Select	Answer
A	Power supply and amplifier
B	Amplifier and antenna
C	Microphone and transceiver
D	Computer and transceiver

24. - G7A11

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

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

25. - G7B09

What determines the frequency of an LC oscillator?

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

26. - G7C06

What should be the impedance of a low-pass filter as compared to the impedance of the transmission line into which it is inserted?

Select	Answer
A	Substantially lower
B	Twice the transmission line impedance
C	Substantially higher
D	About the same

27. - G8A10

What is meant by the term flat-topping when referring to a single sideband phone transmission?

Select	Answer
A	The transmitter's carrier is properly suppressed
B	Signal distortion caused by excessive drive
C	Signal distortion caused by insufficient collector current
D	The transmitter's automatic level control (ALC) is properly adjusted

28. - G8B02

If a receiver mixes a 13.800 MHz VFO with a 14.255 MHz received signal to produce a 455 kHz intermediate frequency (IF) signal, what type of interference will a 13.345 MHz signal produce in the receiver?

Select	Answer
A	Image response
B	Mixer interference
C	Quadrature noise
D	Intermediate interference

29. - G8C04

Which of the following describes Baudot code?

Select	Answer
A	A 5-bit code with additional start and stop bits
B	A 7-bit code with start, stop and parity bits
C	A code using error detection and correction
D	A code using SELCAL and LISTEN

30. - G9A03

What is the characteristic impedance of flat ribbon TV type twinlead?

Select	Answer
A	50 ohms
B	75 ohms
C	100 ohms
D	300 ohms

31. - G9B07

How does the feed point impedance of a 1/2 wave dipole antenna change as the antenna is lowered below 1/4 wave above ground?

Select	Answer
A	It steadily decreases
B	It is unaffected by the height above ground
C	It steadily increases
D	It peaks at about 1/8 wavelength above ground

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 6 dB higher
B	Approximately 9 dB higher
C	Approximately 1.5 dB higher
D	Approximately 3 dB higher

33. - G9D01

What does the term NVIS mean as related to antennas?

Select	Answer
A	Non-Varying Impedance Smoothing
B	Non-Varying Indicated SWR
C	Near Vertical Incidence sky-wave
D	Nearly Vertical Inductance System

34. - G0A01

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

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

35. - G0B13

What must you do when powering your house from an emergency generator?

Select	Answer
A	All of these choices are correct
B	Disconnect the incoming utility power feed
C	Insure that all lightning grounds are disconnected
D	Insure that the generator is not grounded

Figure G7-1