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. - G1A06

Which of the following frequencies is within the General Class portion of the 75-meter phone band?

Select	Answer
A	1875 kHz
B	3750 kHz
C	3900 kHz
D	4005 kHz

2. - G1B01

What is the maximum height above ground to which an antenna structure may be erected without requiring notification to the FAA and registration with the FCC, provided it is not at or near a public use airport?

Select	Answer
A	200 feet
B	300 feet
C	50 feet
D	100 feet

3. - G1C01

What is the maximum transmitting power an amateur station may use on 10.140 MHz?

Select	Answer
A	1500 watts PEP output
B	1000 watts PEP output
C	200 watts PEP output
D	2000 watts PEP output

4. - G1D11

If a person has an expired FCC issued amateur radio license of General Class or higher, what is required before they can receive a new license?

Select	Answer
A	The applicant must pass the current element 2 exam
B	They must have a letter from the FCC showing they once held an amateur or commercial license
C	There are no requirements other than being able to show a copy of the expired license
D	The applicant must be able to produce a copy of a page from a call book published in the USA showing his or her name and address

5. - G1E01

Which of the following would disqualify a third party from participating in stating a message over an amateur station?

Select	Answer
A	The third party is not a U.S. citizen
B	The third party's amateur license has been revoked and not reinstated
C	The third party is a licensed amateur
D	The third party is speaking in a language other than English

6. - G2A11

What does the expression "CQ DX" usually indicate?

Select	Answer
A	The caller is looking for any station outside their own country
B	A general call for any station
C	A distress call
D	The caller is listening for a station in Germany

7. - G2B02

What is the first thing you should do if you are communicating with another amateur station and hear a station in distress break in?

Select	Answer
A	Continue your communication because you were on the frequency first
B	Acknowledge the station in distress and determine what assistance may be needed
C	Immediately cease all transmissions
D	Change to a different frequency

8. - G2C10

What does the Q signal "QRN" mean?

Select	Answer
A	Stop sending
B	I am troubled by static
C	Send more slowly
D	Zero beat my signal

9. - G2D01

What is the Amateur Auxiliary to the FCC?

Select	Answer
A	Amateur volunteers who use their station equipment to help civil defense organizations in times of emergency
B	Amateur volunteers who conduct frequency coordination for amateur VHF repeaters
C	Amateur volunteers who conduct amateur licensing examinations
D	Amateur volunteers who are formally enlisted to monitor the airwaves for rules violations

10. - G2E01

Which mode is normally used when sending an RTTY signal via AFSK with an SSB transmitter?

Select	Answer
A	USB
B	CW
C	LSB
D	DSB

11. - G3A02

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

Select	Answer
A	It enhances propagation on all HF 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 disrupts signals on lower frequencies more than those on higher frequencies

12. - G3B11

What happens to HF propagation when the LUF exceeds the MUF?

Select	Answer
A	Propagation over the path on all HF frequencies is enhanced
B	Double hop propagation along the path is more common
C	No HF radio frequency will support ordinary sky-wave communications over the path
D	HF communications over the path are enhanced

13. - G3C13

What is Near Vertical Incidence Sky-wave (NVIS) propagation?

Select	Answer
A	Long path HF propagation at sunrise and sunset
B	Propagation near the MUF
C	Short distance MF or HF propagation using high elevation angles
D	Double hop propagation near the LUF

14. - G4A02

What is one advantage of selecting the opposite or "reverse" sideband when receiving CW signals on a typical HF transceiver?

Select	Answer
A	Interference from impulse noise will be eliminated
B	It may be possible to reduce or eliminate interference from other signals
C	Accidental out of band operation can be prevented
D	More stations can be accommodated within a given signal passband

15. - G4B02

Which of the following is an advantage of an oscilloscope versus a digital voltmeter?

Select	Answer
A	An oscilloscope uses less power
B	Complex waveforms can be measured
C	Input impedance is much lower
D	Complex impedances can be easily measured

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	The ground wire has high impedance on that frequency
C	The ground rod is resonant
D	Insulated wire has been used for the ground wire

17. - G4D10

How close to the lower edge of the 40-meter General Class phone segment should your displayed carrier frequency be when using 3 kHz wide LSB?

Select	Answer
A	At least 1 kHz above the edge of the segment
B	At least 3 kHz below the edge of the segment
C	Your displayed carrier frequency may be set at the edge of the segment
D	At least 3 kHz above the edge of the segment

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 socket is not wired with an RF-shielded power cable
C	The DC polarity of the socket is reversed from the polarity of modern HF transceivers
D	Drawing more than 50 watts from this socket could cause the engine to overheat

19. - G5A02

What is reactance?

Select	Answer
A	A large spark produced at switch contacts when an inductor is de-energized
B	Opposition to the flow of alternating current caused by capacitance or inductance
C	Opposition to the flow of direct current caused by resistance
D	A property of ideal resistors in AC circuits

20. - G5B09

What is the RMS voltage of a sine wave with a value of 17 volts peak?

Select	Answer
A	12 volts
B	8.5 volts
C	24 volts
D	34 volts

21. - G5C04

What is the total resistance of three 100 ohm resistors in parallel?

Select	Answer
A	0.33 ohms
B	0.30 ohms
C	300 ohms
D	33.3 ohms

22. - G6A05

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

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

23. - G6B08

How is an LED biased when emitting light?

Select	Answer
A	Forward Biased
B	Beyond cutoff
C	At the Zener voltage
D	Reverse Biased

24. - G7A05

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

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

25. - G7B14

Which of the following describes a linear amplifier?

Select	Answer
A	Any RF power amplifier used in conjunction with an amateur transceiver
B	An amplifier used as a frequency multiplier
C	An amplifier in which the output preserves the input waveform
D	A Class C high efficiency amplifier

26. - G7C07

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

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

27. - G8A09

What control is typically adjusted for proper ALC setting on an amateur single sideband transceiver?

Select	Answer
A	Antenna inductance or capacitance
B	The RF clipping level
C	Attenuator level
D	Transmit audio or microphone gain

28. - G8B03

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

Select	Answer
A	Synthesizing
B	Phase inverting
C	Heterodyning
D	Cancellation

29. - G8C11

How are the two separate frequencies of a Frequency Shift Keyed (FSK) signal identified?

Select	Answer
A	Dot and Dash
B	High and Low
C	On and Off
D	Mark and Space

30. - G9A15

What is the effect of transmission line loss on SWR measured at the input to the line?

Select	Answer
A	The higher the transmission line loss, the more accurate the SWR measurement will be
B	The higher the transmission line loss, the more the SWR will read artificially high
C	Transmission line loss does not affect the SWR measurement
D	The higher the transmission line loss, the more the SWR will read artificially low

31. - G9B07

How does the feed point impedance of a 1/2 wave dipole antenna change as the antenna is lowered below 1/4 wave above ground?

Select	Answer
A	It steadily decreases
B	It steadily increases
C	It is unaffected by the height above ground
D	It peaks at about 1/8 wavelength above ground

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

33. - G9D07

Which of the following describes a log periodic antenna?

Select	Answer
A	Length and spacing of the elements increase logarithmically from one end of the boom to the other
B	Impedance varies periodically as a function of frequency
C	SWR varies periodically as a function of boom length
D	Gain varies logarithmically as a function of frequency

34. - G0A10

What is one thing that can be done if evaluation shows that a neighbor might receive more than the allowable limit of RF exposure from the main lobe of a directional antenna?

Select	Answer
A	Change to a non-polarized antenna with higher gain
B	Post a warning sign that is clearly visible to the neighbor
C	Use an antenna with a higher front-to-back ratio
D	Take precautions to ensure that the antenna cannot be pointed in their direction

35. - G0B11

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

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