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	12 meters
B	20 meters
C	160 meters
D	30 meters

2. - G1B10

What is the power limit for beacon stations?

Select	Answer
A	100 watts PEP output
B	200 watts PEP output
C	10 watts PEP output
D	20 watts PEP output

3. - G1C11

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

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

4. - G1D08

Which of the following criteria must be met for a non-U.S. citizen to be an accredited Volunteer Examiner?

Select	Answer
A	The person must hold an FCC granted Amateur Radio license of General Class or above
B	None of these choices is correct; a non-U.S. citizen cannot be a Volunteer Examiner
C	The person must be a resident of the U.S. for a minimum of 5 years
D	The person's home citizenship must be in ITU region 2

5. - G1E02

When may a 10-meter repeater retransmit the 2-meter signal from a station having a Technician Class control operator?

Select	Answer
A	Only during an FCC declared general state of communications emergency
B	Only if the station on 10-meters is operating under a Special Temporary Authorization allowing such retransmission
C	Only if the 10-meter repeater control operator holds at least a General Class license
D	Under no circumstances

6. - G2A02

Which of the following modes is most commonly used for voice communications on the 160-meter, 75-meter, and 40-meter bands?

Select	Answer
A	Vestigial sideband
B	Lower sideband
C	Double sideband
D	Upper sideband

7. - G2B07

Which of the following complies with good amateur practice when choosing a frequency on which to initiate a call?

Select	Answer
A	All of these choices are correct
B	Check to see if the channel is assigned to another station
C	Follow the voluntary band plan for the operating mode you intend to use
D	Identify your station by transmitting your call sign at least 3 times

8. - G2C06

What does the term "zero beat" mean in CW operation?

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

9. - G2D02

Which of the following are objectives of the Amateur Auxiliary?

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

10. - G2E08

In what segment of the 20-meter band are most PSK31 operations commonly found?

Select	Answer
A	In the middle of the CW segment, near 14.100 MHz
B	At the bottom of the slow-scan TV segment, near 14.230 MHz
C	Below the RTTY segment, near 14.070 MHz
D	At the top of the SSB phone segment, near 14.325 MHz

11. - G3A02

What effect does a Sudden Ionospheric Disturbance have on the daytime ionospheric propagation of HF radio waves?

Select	Answer
A	It disrupts signals on lower frequencies more than those on higher frequencies
B	It disrupts communications via satellite more than direct communications
C	None, because only areas on the night side of the Earth are affected
D	It enhances propagation on all HF frequencies

12. - G3B09

What is the approximate maximum distance along the Earth's surface that is normally covered in one hop using the F2 region?

Select	Answer
A	12,000 miles
B	2,500 miles
C	180 miles
D	1,200 miles

13. - G3C01

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

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

14. - G4A01

What is the purpose of the "notch filter" found on many HF transceivers?

Select	Answer
A	To reduce interference from carriers in the receiver passband
B	To restrict the transmitter voice bandwidth
C	To enhance the reception of a specific frequency on a crowded band
D	To eliminate receiver interference from impulse noise sources

15. - G4B10

Which of the following can be determined with a directional wattmeter?

Select	Answer
A	RF interference
B	Antenna front-to-back ratio
C	Standing wave ratio
D	Radio wave propagation

16. - G4C02

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

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

17. - G4D07

How much must the power output of a transmitter be raised to change the S meter reading on a distant receiver from S8 to S9?

Select	Answer
A	Approximately 4 times
B	Approximately 8 times
C	Approximately 1.5 times
D	Approximately 2 times

18. - G4E02

What is the purpose of a corona ball on a HF mobile antenna?

Select	Answer
A	To narrow the operating bandwidth of the antenna
B	To increase the "Q" of the antenna
C	To reduce high voltage discharge from the tip of the antenna
D	To reduce the chance of damage if the antenna should strike an object

19. - G5A08

Why is impedance matching important?

Select	Answer
A	To ensure that the resistance and reactance in the circuit are equal
B	So the source can deliver maximum power to the load
C	So the load will draw minimum power from the source
D	To ensure that there is less resistance than reactance in the circuit

20. - G5B12

What would be the RMS voltage across a 50 ohm dummy load dissipating 1200 watts?

Select	Answer
A	173 volts
B	245 volts
C	692 volts
D	346 volts

21. - G5C10

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

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

22. - G6A01

What is the minimum allowable discharge voltage for maximum life of a standard 12 volt lead acid battery?

Select	Answer
A	12 volts
B	6 volts
C	8.5 volts
D	10.5 volts

23. - G6B06

What kind of device is an integrated circuit operational amplifier?

Select	Answer
A	Digital
B	Programmable Logic
C	Analog
D	MMIC

24. - G7A08

Which of the following is an advantage of a switchmode power supply as compared to a linear power supply?

Select	Answer
A	Faster switching time makes higher output voltage possible
B	All of these choices are correct
C	Fewer circuit components are required
D	High frequency operation allows the use of smaller components

25. - G7B11

For which of the following modes is a Class C power stage appropriate for amplifying a modulated signal?

Select	Answer
A	AM
B	CW
C	All of these choices are correct
D	SSB

26. - G7C09

Which of the following is needed for a Digital Signal Processor IF filter?

Select	Answer
A	A digital to analog converter
B	An analog to digital converter
C	All of the these choices are correct
D	A digital processor chip

27. - G8A05

What type of modulation varies the instantaneous power level of the RF signal?

Select	Answer
A	Frequency shift keying
B	Frequency modulation
C	Phase modulation
D	Amplitude modulation

28. - G8B10

What is the relationship between transmitted symbol rate and bandwidth?

Select	Answer
A	Lower symbol rates require wider bandwidth
B	Bandwidth is always half the symbol rate
C	Symbol rate and bandwidth are not related
D	Higher symbol rates require wider bandwidth

29. - G8C12

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

Select	Answer
A	Varicode
B	Viterbi
C	Binary
D	Volumetric

30. - G9A09

What standing wave ratio will result when connecting a 50 ohm feed line to a non-reactive load having 200 ohm impedance?

Select	Answer
A	1:2
B	1:4
C	2:1
D	4:1

31. - G9B08

How does the feed point impedance of a 1/2 wave dipole change as the feed point is moved from the center toward the ends?

Select	Answer
A	It steadily decreases
B	It peaks at about 1/8 wavelength from the end
C	It steadily increases
D	It is unaffected by the location of the feed point

32. - G9C14

How does the forward gain of a two-element quad antenna compare to the forward gain of a three-element Yagi antenna?

Select	Answer
A	About 1.5 times as much
B	About 2/3 as much
C	About the same
D	About twice as much

33. - G9D03

At what height above ground is an NVIS antenna typically installed?

Select	Answer
A	As close to 1/2 wavelength as possible
B	As close to one wavelength as possible
C	Between 1/10 and 1/4 wavelength
D	Height is not critical as long as it is significantly more than 1/2 wavelength

34. - G0A01

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

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

35. - G0B01

Which wire or wires in a four-conductor connection should be attached to fuses or circuit breakers in a device operated from a 240 VAC single phase source?

Select	Answer
A	Only the two wires carrying voltage
B	Only the neutral wire
C	All wires
D	Only the ground wire