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. - G1A03

On which of the following bands is image transmission prohibited?

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

2. - G1B11

How does the FCC require an amateur station to be operated in all respects not specifically covered by the Part 97 rules?

Select	Answer
A	In conformance with the rules of the IARU
B	All of these choices are correct
C	In conformance with good engineering and good amateur practice
D	In conformance with Amateur Radio custom

3. - G1C11

What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 2-meter band?

Select	Answer
A	300 baud
B	56 kilobaud
C	19.6 kilobaud
D	1200 baud

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	Extra, General and Technician
C	General and Technician
D	General only

5. - G1E03

What is required to conduct communications with a digital station operating under automatic control outside the automatic control band segments?

Select	Answer
A	The station initiating the contact must be under local or remote control
B	No third party traffic maybe be transmitted
C	The interrogating transmission must be made by another automatically controlled station
D	The control operator of the interrogating station must hold an Extra Class license

6. - G2A05

Which mode of voice communication is most commonly used on the HF amateur bands?

Select	Answer
A	Phase modulation
B	Frequency modulation
C	Double sideband
D	Single sideband

7. - G2B04

When selecting a CW transmitting frequency, what minimum separation should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	150 to 500 Hz
B	3 to 6 kHz
C	5 to 50 Hz
D	1 to 3 kHz

8. - G2C08

What prosign is sent to indicate the end of a formal message when using CW?

Select	Answer
A	SK
B	KN
C	BK
D	AR

9. - G2D03

What skills learned during hidden transmitter hunts are of help to the Amateur Auxiliary?

Select	Answer
A	Identification of out of band operation
B	Hunters have an opportunity to transmit on non-amateur frequencies
C	Direction finding used to locate stations violating FCC Rules
D	Identification of different call signs

10. - G2E03

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

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

11. - G3A06

What is a geomagnetic storm?

Select	Answer
A	A sudden drop in the solar flux index
B	Ripples in the ionosphere
C	A temporary disturbance in the Earth's magnetosphere
D	A thunderstorm which affects radio propagation

12. - G3B07

What does LUF stand for?

Select	Answer
A	The Longest Universal Function during a 24 hour period
B	The Lowest Usable Frequency for communications between two points
C	The Longest Universal Function for communications between two points
D	The Lowest Usable Frequency during a 24 hour period

13. - G3C10

Which of the following might be an indication that signals heard on the HF bands are being received via scatter propagation?

Select	Answer
A	The signal is heard on a frequency below the Maximum Usable Frequency
B	The signal is heard on a frequency above the Maximum Usable Frequency
C	The communication is during a sudden ionospheric disturbance
D	The communication is during a sunspot maximum

14. - G4A06

What type of device is often used to match transmitter output impedance to an impedance not equal to 50 ohms?

Select	Answer
A	Balanced modulator
B	SWR Bridge
C	Q Multiplier
D	Antenna coupler or antenna tuner

15. - G4B08

Which of the following instruments may be used to monitor relative RF output when making antenna and transmitter adjustments?

Select	Answer
A	A multimeter
B	A field strength meter
C	An antenna noise bridge
D	A Q meter

16. - G4C13

Which of the following can perform automatic notching of interfering carriers?

Select	Answer
A	A noise limiter
B	Bandpass tuning
C	Balanced mixing
D	A Digital Signal Processor (DSP) filter

17. - G4D04

What does an S meter measure?

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

18. - G4E11

Which of the following is a disadvantage of using wind as the primary source of power for an emergency station?

Select	Answer
A	The conversion efficiency from mechanical energy to electrical energy is less than 2 percent
B	All of these choices are correct
C	A large energy storage system is needed to supply power when the wind is not blowing
D	The voltage and current ratings of such systems are not compatible with amateur equipment

19. - G5A11

Which of the following describes one method of impedance matching between two AC circuits?

Select	Answer
A	Insert an LC network between the two circuits
B	Increase the power output of the first circuit
C	Insert a circulator between the two circuits
D	Reduce the power output of the first circuit

20. - G5B14

What is the output PEP from a transmitter if an oscilloscope measures 500 volts peak-to-peak across a 50 ohm resistive load connected to the transmitter output?

Select	Answer
A	8.75 watts
B	5000 watts
C	625 watts
D	2500 watts

21. - G5C07

What is the turns ratio of a transformer used to match an audio amplifier having 600 ohm output impedance to a speaker having 4 ohm impedance?

Select	Answer
A	12.2 to 1
B	150 to 1
C	24.4 to 1
D	300 to 1

22. - G6A13

Why is the polarity of applied voltages important for polarized capacitors?

Select	Answer
A	Reverse voltages can destroy the dielectric layer of an electrolytic capacitor
B	All of these choices are correct
C	The capacitor could overheat and explode
D	Incorrect polarity can cause the capacitor to short-circuit

23. - G6B08

How is an LED biased when emitting light?

Select	Answer
A	At the Zener voltage
B	Reverse Biased
C	Forward Biased
D	Beyond cutoff

24. - G7A11

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

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

25. - G7B02

Which of the following is an advantage of using the binary system when processing digital signals?

Select	Answer
A	The binary number system is most accurate
B	All of these choices are correct
C	Binary numbers are more compatible with analog circuitry
D	Binary "ones" and "zeros" are easy to represent by an "on" or "off" state

26. - G7C07

What is the simplest combination of stages that implement a superheterodyne receiver?

Select	Answer
A	RF amplifier, mixer, IF discriminator
B	HF oscillator, prescaler, audio amplifier
C	HF oscillator, mixer, detector
D	RF amplifier, detector, audio amplifier

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	Angle convolution
C	Phase convolution
D	Radian inversion

28. - G8B03

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

Select	Answer
A	Heterodyning
B	Synthesizing
C	Cancellation
D	Phase inverting

29. - G8C10

How does forward error correction (FEC) allow the receiver to correct errors in received data packets?

Select	Answer
A	By using a parity bit with each character
B	By transmitting redundant information with the data
C	By using the varicode character set
D	By controlling transmitter output power for optimum signal strength

30. - G9A01

Which of the following factors determine the characteristic impedance of a parallel conductor antenna feed line?

Select	Answer
A	The distance between the centers of the conductors and the radius of the conductors
B	The distance between the centers of the conductors and the length of the line
C	The frequency of the signal and the length of the line
D	The radius of the conductors and the frequency of the signal

31. - G9B11

What is the approximate length for a 1/2 wave dipole antenna cut for 3.550 MHz?

Select	Answer
A	131 feet
B	42 feet
C	84 feet
D	263 feet

32. - G9C20

What is meant by the terms dBi and dBd when referring to antenna gain?

Select	Answer
A	dBi refers to an isometric antenna, dBd refers to a discone antenna
B	dBi refers to an isotropic antenna, dBd refers to a dipole antenna
C	dBi refers to an inverted-vee antenna, dBd refers to a downward reflecting antenna
D	dBi refers to an ionospheric reflecting antenna, dBd refers to a dissipative antenna

33. - G9D04

What is the primary purpose of antenna traps?

Select	Answer
A	To permit multiband operation
B	To notch spurious frequencies
C	To prevent out of band operation
D	To provide balanced feed point impedance

34. - G0A12

What precaution should you take whenever you make adjustments or repairs to an antenna?

Select	Answer
A	All of these choices are correct
B	Wear a radiation badge
C	Ensure that you and the antenna structure are grounded
D	Turn off the transmitter and disconnect the feed line

35. - G0B14

Which of the following is covered by the National Electrical Code?

Select	Answer
A	Electrical safety inside the ham shack
B	RF exposure limits of the human body
C	Acceptable modulation limits
D	Acceptable bandwidth limits

Figure G7-1