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. - G1A12

Which of the following applies when the FCC rules designate the Amateur Service as a secondary user on a band?

Select	Answer
A	Amateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station
B	Amateur stations are allowed to use the band only during emergencies
C	Amateur stations may only operate during specific hours of the day, while primary users are permitted 24 hour use of the band
D	Amateur stations are allowed to use the band only if they do not cause harmful interference to primary users

2. - G1B09

When may an amateur station transmit communications in which the licensee or control operator has a pecuniary (monetary) interest?

Select	Answer
A	When other amateurs are being notified of the sale of apparatus normally used in an amateur station and such activity is not done on a regular basis
B	When other amateurs are being notified of the sale of any item with a monetary value less than $200 and such activity is not done on a regular basis
C	Only when there is no other means of communications readily available
D	Never

3. - G1C04

Which of the following limitations apply to transmitter power on every amateur band?

Select	Answer
A	Only the minimum power necessary to carry out the desired communications should be used
B	Power must be limited to 200 watts when transmitting between 14.100 MHz and 14.150 MHz
C	Power should be limited as necessary to avoid interference to another radio service on the frequency
D	Effective radiated power cannot exceed 1500 watts

4. - G1D07

Volunteer Examiners are accredited by what organization?

Select	Answer
A	The Universal Licensing System
B	The Federal Communications Commission
C	The Wireless Telecommunications Bureau
D	A Volunteer Examiner Coordinator

5. - G1E07

With which foreign countries is third party traffic prohibited, except for messages directly involving emergencies or disaster relief communications?

Select	Answer
A	Countries in ITU Region 1
B	Countries in ITU Region 2
C	Every foreign country, unless there is a third party agreement in effect with that country
D	Any country which is not a member of the International Amateur Radio Union (IARU)

6. - G2A05

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

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

7. - G2B08

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

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

8. - G2C03

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

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

9. - G2D11

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

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

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	Below the RTTY segment, near 14.070 MHz
C	At the bottom of the slow-scan TV segment, near 14.230 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	None, because only areas on the night side of the Earth are affected
B	It disrupts signals on lower frequencies more than those on higher frequencies
C	It disrupts communications via satellite more than direct communications
D	It enhances propagation on all HF frequencies

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

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

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

16. - G4C08

Which of the following would reduce RF interference caused by common-mode current on an audio cable?

Select	Answer
A	Adding shunt inductors to the conductors
B	Placing a ferrite choke around the cable
C	Adding series capacitors to the conductors
D	Adding an additional insulating jacket to the cable

17. - G4D02

Which of the following describes how a speech processor affects a transmitted single sideband phone signal?

Select	Answer
A	It increases peak power
B	It reduces harmonic distortion
C	It increases average power
D	It reduces intermodulation distortion

18. - G4E06

What is one disadvantage of using a shortened mobile antenna as opposed to a full size antenna?

Select	Answer
A	Operating bandwidth may be very limited
B	Short antennas are more likely to cause distortion of transmitted signals
C	Harmonic radiation may increase
D	Short antennas can only receive circularly polarized signals

19. - G5A09

What unit is used to measure reactance?

Select	Answer
A	Ampere
B	Ohm
C	Siemens
D	Farad

20. - G5B04

How many watts of electrical power are used by a 12 VDC light bulb that draws 0.2 amperes?

Select	Answer
A	2.4 watts
B	24 watts
C	60 watts
D	6 watts

21. - G5C14

Which of the following components should be added to an inductor to increase the inductance?

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

22. - G6A11

Which of the following solid state devices is most like a vacuum tube in its general operating characteristics?

Select	Answer
A	A varistor
B	A field effect transistor
C	A bipolar transistor
D	A tunnel diode

23. - G6B06

What kind of device is an integrated circuit operational amplifier?

Select	Answer
A	Analog
B	Digital
C	Programmable Logic
D	MMIC

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. - G7B10

Which of the following is a characteristic of a Class A amplifier?

Select	Answer
A	No need for bias
B	Low distortion
C	High Efficiency
D	Low standby power

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. - G8A04

What emission is produced by a reactance modulator connected to a transmitter RF amplifier stage?

Select	Answer
A	Multiplex modulation
B	Pulse modulation
C	Amplitude modulation
D	Phase modulation

28. - G8B07

What is the frequency deviation for a 12.21 MHz reactance modulated oscillator in a 5 kHz deviation, 146.52 MHz FM phone transmitter?

Select	Answer
A	416.7 Hz
B	60 kHz
C	5 kHz
D	101.75 Hz

29. - G8C10

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

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

30. - G9A04

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

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

31. - G9B01

What is one disadvantage of a directly fed random-wire HF antenna?

Select	Answer
A	It must be longer than 1 wavelength
B	You may experience RF burns when touching metal objects in your station
C	It is more effective on the lower HF bands than on the higher bands
D	It produces only vertically polarized radiation

32. - G9C01

Which of the following would increase the bandwidth of a Yagi antenna?

Select	Answer
A	Tapered-diameter elements
B	Loading coils in series with the element
C	Larger diameter elements
D	Closer element spacing

33. - G9D10

Which of the following describes a Beverage antenna?

Select	Answer
A	A broad-band mobile antenna
B	A vertical antenna
C	A very long and low directional receiving antenna
D	A helical antenna for space reception

34. - G0A03

How can you determine that your station complies with FCC RF exposure regulations?

Select	Answer
A	All of these choices are correct
B	By calculation based on FCC OET Bulletin 65
C	By measurement of field strength using calibrated equipment
D	By calculation based on computer modeling

35. - G0B02

What is the minimum wire size that may be safely used for a circuit that draws up to 20 amperes of continuous current?

Select	Answer
A	AWG number 16
B	AWG number 20
C	AWG number 12
D	AWG number 8