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. - G1A11

When General Class licensees are not permitted to use the entire voice portion of a particular band, which portion of the voice segment is generally available to them?

Select	Answer
A	The lower frequency end
B	The lower frequency end on frequencies below 7.3 MHz and the upper end on frequencies above 14.150 MHz
C	The upper frequency end on frequencies below 7.3 MHz and the lower end on frequencies above 14.150 MHz
D	The upper frequency end

2. - G1B05

When may music be transmitted by an amateur station?

Select	Answer
A	At any time, as long as it produces no spurious emissions
B	When it is transmitted on frequencies above 1215 MHz
C	When it is unintentionally transmitted from the background at the transmitter
D	When it is an incidental part of a manned space craft retransmission

3. - G1C05

Which of the following is a limitation on transmitter power on the 28 MHz band for a General Class control operator?

Select	Answer
A	100 watts PEP output
B	1000 watts PEP output
C	1500 watts PEP output
D	2000 watts PEP output

4. - G1D09

How long is a Certificate of Successful Completion of Examination (CSCE) valid for exam element credit?

Select	Answer
A	180 days
B	For as long as your current license is valid
C	365 days
D	30 days

5. - G1E11

Which of the following is the FCC term for an unattended digital station that transfers messages to and from the Internet?

Select	Answer
A	Locally controlled station
B	Robotically controlled station
C	Automatically controlled digital station
D	Fail-safe digital station

6. - G2A08

Which of the following is a recommended way to break into a contact when using phone?

Select	Answer
A	Say "CQ" followed by the call sign of either station
B	Say "QRZ" several times followed by your call sign
C	Say your call sign during a break between transmissions by the other stations
D	Say "Break Break Break" and wait for a response

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	Send the letter "V" in Morse code several times and listen for a response or say "test" several times and listen for a response
B	Send "QSY" on CW or if using phone, announce "the frequency is in use", then give your call 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	Listen for 2 minutes before calling CQ

8. - G2C04

What does the Q signal "QRL?" mean?

Select	Answer
A	"Are you operating full break-in" or "Can you operate full break-in?"
B	"Are you busy?", or "Is this frequency in use?"
C	"Are you listening only for a specific station?"
D	"Will you keep the frequency clear?"

9. - G2D11

Which HF antenna would be the best to use for minimizing interference?

Select	Answer
A	An isotropic antenna
B	A directional antenna
C	A quarter-wave vertical antenna
D	An omnidirectional antenna

10. - G2E05

What is the standard sideband used to generate a JT65 or JT9 digital signal when using AFSK in any amateur band?

Select	Answer
A	USB
B	SSB
C	LSB
D	DSB

11. - G3A06

What is a geomagnetic storm?

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

12. - G3B02

Which of the following is a good indicator of the possibility of sky-wave propagation on the 6-meter band?

Select	Answer
A	Short skip sky-wave propagation on the 10-meter band
B	Severe attenuation of signals on the 10-meter band
C	Long delayed echoes on the 10-meter band
D	Long skip sky-wave propagation on the 10-meter band

13. - G3C06

What is a characteristic of HF scatter signals?

Select	Answer
A	They have very large swings in signal strength
B	They have a wavering sound
C	All of these choices are correct
D	They have high intelligibility

14. - G4A04

What reading on the plate current meter of a vacuum tube RF power amplifier indicates correct adjustment of the plate tuning control?

Select	Answer
A	A pronounced peak
B	A pronounced dip
C	No change will be observed
D	A slow, rhythmic oscillation

15. - G4B10

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

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

16. - G4C11

Which of the following is a function of a digital signal processor?

Select	Answer
A	To provide adequate grounding
B	To increase antenna gain
C	To remove noise from received signals
D	To increase antenna bandwidth

17. - G4D03

Which of the following can be the result of an incorrectly adjusted speech processor?

Select	Answer
A	Splatter
B	Excessive background pickup
C	Distorted speech
D	All of these choices are correct

18. - G4E02

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

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

19. - G5A01

What is impedance?

Select	Answer
A	The opposition to the flow of current in an AC circuit
B	The inverse of resistance
C	The force of repulsion between two similar electric fields
D	The electric charge stored by a capacitor

20. - G5B10

What percentage of power loss would result from a transmission line loss of 1 dB?

Select	Answer
A	20.5 percent
B	12.2 percent
C	25.9 percent
D	10.9 percent

21. - G5C12

What is the capacitance of a 20 microfarad capacitor connected in series with a 50 microfarad capacitor?

Select	Answer
A	0.07 microfarads
B	70 microfarads
C	14.3 microfarads
D	1000 microfarads

22. - 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 decrease plate resistance
C	To increase the control grid resistance
D	To increase efficiency

23. - G6B07

Which of the following is an advantage of an LED indicator compared to an incandescent indicator?

Select	Answer
A	Lower power consumption
B	All of these choices are correct
C	Faster response time
D	Longer life

24. - G7A04

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

Select	Answer
A	One-half the normal output voltage of the power supply
B	Equal to 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. - G7B12

Which of these classes of amplifiers has the highest efficiency?

Select	Answer
A	Class AB
B	Class C
C	Class B
D	Class A

26. - G7C01

Which of the following is used to process signals from the balanced modulator then send them to the mixer in some single sideband phone transmitters?

Select	Answer
A	IF amplifier
B	Filter
C	RF amplifier
D	Carrier oscillator

27. - G8A06

What is one advantage of carrier suppression in a single sideband phone transmission versus full carrier amplitude modulation?

Select	Answer
A	Simpler receiving equipment can be used
B	Audio fidelity is improved
C	Greater modulation percentage is obtainable with lower distortion
D	Available transmitter power can be used more effectively

28. - G8B09

Why is it good to match receiver bandwidth to the bandwidth of the operating mode?

Select	Answer
A	It is required by FCC rules
B	It improves impedance matching of the antenna
C	It minimizes power consumption in the receiver
D	It results in the best signal to noise ratio

29. - G8C07

How does the receiving station respond to an ARQ data mode packet containing errors?

Select	Answer
A	It terminates the contact
B	It sends the packet back to the transmitting station
C	It requests a change in transmitting protocol
D	It requests the packet be retransmitted

30. - G9A06

In what units is RF feed line loss usually expressed?

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

31. - G9B11

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

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

32. - G9C15

Approximately how long is each side of the reflector element of a quad antenna?

Select	Answer
A	Slightly less than 1/4 wavelength
B	Slightly less than 1/2 wavelength
C	Slightly more than 1/4 wavelength
D	Slightly more than 1/2 wavelength

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	Height is not critical as long as it is significantly more than 1/2 wavelength
D	Between 1/10 and 1/4 wavelength

34. - G0A12

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

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

35. - G0B11

Which of the following is good practice for lightning protection grounds?

Select	Answer
A	Lightning grounds must be connected to all ungrounded wiring
B	Bends in ground wires must be made as close as possible to a right angle
C	They must be bonded to all buried water and gas lines
D	They must be bonded together with all other grounds