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. - G1A09

Which of the following frequencies is within the General Class portion of the 15-meter band?

Select	Answer
A	24900 kHz
B	18155 kHz
C	21300 kHz
D	14250 kHz

2. - G1B03

Which of the following is a purpose of a beacon station as identified in the FCC rules?

Select	Answer
A	Transmission of bulletins of general interest to Amateur Radio licensees
B	Observation of propagation and reception
C	Identifying net frequencies
D	Automatic identification of repeaters

3. - G1C03

What is the maximum bandwidth permitted by FCC rules for Amateur Radio stations transmitting on USB frequencies in the 60-meter band?

Select	Answer
A	3 kHz
B	1.8 kHz
C	2.8 kHz
D	5.6 kHz

4. - G1D07

Volunteer Examiners are accredited by what organization?

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

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

6. - G2A10

Which of the following statements is true of voice VOX operation versus PTT operation?

Select	Answer
A	It allows "hands free" operation
B	The received signal is more natural sounding
C	It occupies less bandwidth
D	It provides more power output

7. - G2B03

If propagation changes during your contact and you notice increasing interference from other activity on the same frequency, what should you do?

Select	Answer
A	Report the interference to your local Amateur Auxiliary Coordinator
B	Tell the interfering stations to change frequency
C	Increase power to overcome interference
D	As a common courtesy, move your contact to another frequency

8. - G2C07

When sending CW, what does a "C" mean when added to the RST report?

Select	Answer
A	Key clicks
B	100 percent copy
C	Chirpy or unstable signal
D	Report was read from an S meter rather than estimated

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	Direction finding used to locate stations violating FCC Rules
C	Identification of different call signs
D	Hunters have an opportunity to transmit on non-amateur frequencies

10. - G2E11

What is indicated on a waterfall display by one or more vertical lines adjacent to a PSK31 signal?

Select	Answer
A	Insufficient modulation
B	Backscatter propagation
C	Long Path propagation
D	Overmodulation

11. - G3A06

What is a geomagnetic storm?

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

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

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

14. - G4A14

What is likely to happen if a transceiver's ALC system is not set properly when transmitting AFSK signals with the radio using single sideband mode?

Select	Answer
A	When using digital modes, too much ALC activity can cause the transmitter to overheat
B	All of these choices are correct
C	Improper action of ALC distorts the signal and can cause spurious emissions
D	ALC will invert the modulation of the AFSK mode

15. - G4B13

What is a use for an antenna analyzer other than measuring the SWR of an antenna system?

Select	Answer
A	Determining the gain of a directional antenna
B	Determining the impedance of an unknown or unmarked coaxial cable
C	Measuring the turns ratio of a power transformer
D	Measuring the front to back ratio of an antenna

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	Adding series capacitors to the conductors
C	Placing a ferrite choke around the cable
D	Adding an additional insulating jacket to the cable

17. - G4D03

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

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

18. - G4E04

Why is it best NOT to draw the DC power for a 100 watt HF transceiver from a vehicle's auxiliary power socket?

Select	Answer
A	The socket's wiring may be inadequate for the current drawn by the transceiver
B	The DC polarity of the socket is reversed from the polarity of modern HF transceivers
C	The socket is not wired with an RF-shielded power cable
D	Drawing more than 50 watts from this socket could cause the engine to overheat

19. - G5A04

Which of the following causes opposition to the flow of alternating current in a capacitor?

Select	Answer
A	Conductance
B	Reluctance
C	Admittance
D	Reactance

20. - G5B12

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

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

21. - G5C14

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

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

22. - G6A03

What is the approximate junction threshold voltage of a germanium diode?

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

23. - G6B01

Which of the following is an analog integrated circuit?

Select	Answer
A	NAND Gate
B	Microprocessor
C	Linear voltage regulator
D	Frequency Counter

24. - G7A06

What portion of the AC cycle is converted to DC by a full-wave rectifier?

Select	Answer
A	90 degrees
B	360 degrees
C	270 degrees
D	180 degrees

25. - G7B13

What is the reason for neutralizing the final amplifier stage of a transmitter?

Select	Answer
A	To keep the carrier on frequency
B	To limit the modulation index
C	To eliminate self-oscillations
D	To cut off the final amplifier during standby periods

26. - G7C05

Which of the following is an advantage of a transceiver controlled by a direct digital synthesizer (DDS)?

Select	Answer
A	Variable frequency with the stability of a crystal oscillator
B	Relatively high power output
C	Wide tuning range and no need for band switching
D	Relatively low power consumption

27. - G8A10

What is meant by the term flat-topping when referring to a single sideband phone transmission?

Select	Answer
A	The transmitter's automatic level control (ALC) is properly adjusted
B	Signal distortion caused by insufficient collector current
C	The transmitter's carrier is properly suppressed
D	Signal distortion caused by excessive drive

28. - G8B03

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

Select	Answer
A	Cancellation
B	Synthesizing
C	Heterodyning
D	Phase inverting

29. - G8C01

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

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

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	Operating an antenna at its resonant frequency
C	Feeding the antenna with unbalanced feed line
D	Using more transmitter power than the antenna can handle

31. - G9B09

Which of the following is an advantage of a horizontally polarized as compared to a vertically polarized HF antenna?

Select	Answer
A	Lower ground reflection losses
B	Lower feed point impedance
C	Shorter Radials
D	Lower radiation resistance

32. - G9C13

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

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

33. - G9D01

What does the term NVIS mean as related to antennas?

Select	Answer
A	Non-Varying Impedance Smoothing
B	Near Vertical Incidence sky-wave
C	Non-Varying Indicated SWR
D	Nearly Vertical Inductance System

34. - G0A11

What precaution should you take if you install an indoor transmitting antenna?

Select	Answer
A	Make sure the antenna is properly shielded
B	Position the antenna along the edge of a wall to reduce parasitic radiation
C	Locate the antenna close to your operating position to minimize feed line radiation
D	Make sure that MPE limits are not exceeded in occupied areas

35. - G0B10

Which of the following is a danger from lead-tin solder?

Select	Answer
A	RF energy can convert the lead into a poisonous gas
B	Lead can contaminate food if hands are not washed carefully after handling the solder
C	Tin in the solder can "cold flow" causing shorts in the circuit
D	High voltages can cause lead-tin solder to disintegrate suddenly