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	60 meters
B	12 meters
C	30 meters
D	11 meters

2. - G1B07

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

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

3. - G1C07

What is the maximum symbol rate permitted for RTTY or data emission transmission on the 20-meter band?

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

4. - G1D03

On which of the following band segments may you operate if you are a Technician Class operator and have a CSCE for General Class privileges?

Select	Answer
A	Only the Technician band segments until your upgrade is posted in the FCC database
B	On any General or Technician Class band segment except 30-meters and 60-meters
C	Only on the Technician band segments until your license arrives in the mail
D	On any General or Technician Class band segment

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

6. - G2A09

Why do most amateur stations use lower sideband on the 160-meter, 75-meter and 40-meter bands?

Select	Answer
A	Lower sideband is the only sideband legal on these frequency bands
B	Because it is fully compatible with an AM detector
C	Lower sideband is more efficient than upper sideband at these frequencies
D	Current amateur practice is to use lower sideband on these frequency bands

7. - G2B08

What is the "DX window" in a voluntary band plan?

Select	Answer
A	An FCC rule that allows only digital contacts in that portion of the band
B	A portion of the band that should not be used for contacts between stations within the 48 contiguous United States
C	A portion of the band that has been voluntarily set aside for digital contacts only
D	An FCC rule that prohibits contacts between stations within the United States and possessions in that portion of the band

8. - G2C11

What does the Q signal "QRV" mean?

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

9. - G2D03

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

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

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	All of these choices are correct
C	Failure to establish a connection between stations
D	Frequent retries or timeouts

11. - G3A09

What effect does a high sunspot number have on radio communications?

Select	Answer
A	Frequencies above 300 MHz become usable for long-distance communication
B	Microwave communications become unstable
C	Long-distance communication in the upper HF and lower VHF range is enhanced
D	High-frequency radio signals become weak and distorted

12. - G3B03

Which of the following applies when selecting a frequency for lowest attenuation when transmitting on HF?

Select	Answer
A	Select a frequency just below the critical frequency
B	Select a frequency just below the MUF
C	Select a frequency just above the LUF
D	Select a frequency just above the critical frequency

13. - G3C11

Which of the following antenna types will be most effective for skip communications on 40-meters during the day?

Select	Answer
A	A horizontal dipole placed between 1/8 and 1/4 wavelength above the ground
B	A right-hand circularly polarized antenna
C	A left-hand circularly polarized antenna
D	A vertical antenna

14. - G4A05

What is a reason to use Automatic Level Control (ALC) with an RF power amplifier?

Select	Answer
A	To reduce distortion due to excessive drive
B	To reduce harmonic radiation
C	To increase overall efficiency
D	To balance the transmitter audio frequency response

15. - G4B01

What item of test equipment contains horizontal and vertical channel amplifiers?

Select	Answer
A	A signal generator
B	An oscilloscope
C	An ammeter
D	An ohmmeter

16. - G4C05

What might be the problem if you receive an RF burn when touching your equipment while transmitting on an HF band, assuming the equipment is connected to a ground rod?

Select	Answer
A	Flat braid rather than round wire has been used for the ground wire
B	Insulated wire has been used for the ground wire
C	The ground rod is resonant
D	The ground wire has high impedance on that frequency

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 14.350 MHz
B	14.3455 to 14.3485 MHz
C	14.347 to 14.647 MHz
D	14.344 to 14.347 MHz

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 reduce high voltage discharge from the tip of the antenna
C	To reduce the chance of damage if the antenna should strike an object
D	To increase the "Q" of the antenna

19. - G5A06

How does a capacitor react to AC?

Select	Answer
A	As the amplitude of the applied AC increases, the reactance increases
B	As the frequency of the applied AC increases, the reactance decreases
C	As the frequency of the applied AC increases, the reactance increases
D	As the amplitude of the applied AC increases, the reactance decreases

20. - G5B05

How many watts are dissipated when a current of 7.0 milliamperes flows through 1.25 kilohms resistance?

Select	Answer
A	Approximately 61 watts
B	Approximately 11 watts
C	Approximately 11 milliwatts
D	Approximately 61 milliwatts

21. - G5C03

Which of the following components should be added to an existing resistor to increase the resistance?

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

22. - G6A05

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

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

23. - G6B09

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

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

24. - G7A11

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

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

25. - G7B02

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

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

26. - G7C07

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

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

27. - G8A01

How is an FSK signal generated?

Select	Answer
A	By keying an FM transmitter with a sub-audible tone
B	By reconfiguring the CW keying input to act as a tone generator
C	By changing an oscillator's frequency directly with a digital control signal
D	By using a transceiver's computer data interface protocol to change frequencies

28. - G8B09

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

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

29. - G8C01

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

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

30. - G9A04

What might cause reflected power at the point where a feed line connects to an antenna?

Select	Answer
A	A difference between feed line impedance and antenna feed point impedance
B	Using more transmitter power than the antenna can handle
C	Feeding the antenna with unbalanced feed line
D	Operating an antenna at its resonant frequency

31. - G9B06

Where should the radial wires of a ground-mounted vertical antenna system be placed?

Select	Answer
A	On the surface of the Earth or buried a few inches below the ground
B	As high as possible above the ground
C	At the center of the antenna
D	Parallel to the antenna element

32. - G9C13

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

Select	Answer
A	1/4 wavelength
B	1/2 wavelength
C	3/4 wavelength
D	1 wavelength

33. - G9D06

Which of the following is an advantage of a log periodic antenna?

Select	Answer
A	Higher gain per element than a Yagi antenna
B	Polarization diversity
C	Wide bandwidth
D	Harmonic suppression

34. - G0A02

Which of the following properties is important in estimating whether an RF signal exceeds the maximum permissible exposure (MPE)?

Select	Answer
A	Its power density
B	Its duty cycle
C	Its frequency
D	All of these choices are correct

35. - G0B03

Which size of fuse or circuit breaker would be appropriate to use with a circuit that uses AWG number 14 wiring?

Select	Answer
A	15 amperes
B	60 amperes
C	100 amperes
D	30 amperes

Figure G7-1