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	11 meters
B	30 meters
C	12 meters
D	60 meters

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	Only when there is no other means of communications readily available
C	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
D	Never

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	1000 watts PEP output
B	2000 watts PEP output
C	1500 watts PEP output
D	100 watts PEP output

4. - G1D10

What is the minimum age that one must be to qualify as an accredited Volunteer Examiner?

Select	Answer
A	12 years
B	21 years
C	18 years
D	There is no age limit

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A	The third party's amateur license has been revoked and not reinstated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

6. - G2A09

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

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

7. - G2B05

What is the customary minimum frequency separation between SSB signals under normal conditions?

Select	Answer
A	Approximately 6 kHz
B	Approximately 3 kHz
C	Between 150 and 500 Hz
D	Approximately 10 kHz

8. - G2C09

What does the Q signal "QSL" mean?

Select	Answer
A	I acknowledge receipt
B	We have worked before
C	We have already confirmed by card
D	Send slower

9. - G2D08

What is a reason why many amateurs keep a station log?

Select	Answer
A	The log provides evidence of operation needed to renew a license without retest
B	The ITU requires a log of all international contacts
C	To help with a reply if the FCC requests information
D	The ITU requires a log of all international third party traffic

10. - G2E12

Which of the following describes a waterfall display?

Select	Answer
A	Frequency is horizontal, signal strength is intensity, time is vertical
B	Frequency is vertical, signal strength is intensity, time is horizontal
C	Frequency is horizontal, signal strength is vertical, time is intensity
D	Frequency is vertical, signal strength is horizontal, time is intensity

11. - G3A08

Which of the following effects can a geomagnetic storm have on radio propagation?

Select	Answer
A	Improved ground-wave propagation
B	Improved chances of UHF ducting
C	Degraded high-latitude HF propagation
D	Improved high-latitude HF propagation

12. - G3B04

What is a reliable way to determine if the MUF is high enough to support skip propagation between your station and a distant location on frequencies between 14 and 30 MHz?

Select	Answer
A	Listen for signals from an international beacon in the frequency range you plan to use
B	Send a series of dots on the band and listen for echoes from your signal
C	Check the strength of TV signals from Western Europe
D	Check the strength of signals in the MF AM broadcast band

13. - G3C05

Why is long distance communication on the 40-meter, 60-meter, 80-meter and 160-meter bands more difficult during the day?

Select	Answer
A	The D layer absorbs signals at these frequencies during daylight hours
B	The F layer absorbs signals at these frequencies during daylight hours
C	The F layer is unstable during daylight hours
D	The E layer is unstable during daylight hours

14. - G4A01

What is the purpose of the "notch filter" found on many HF transceivers?

Select	Answer
A	To restrict the transmitter voice bandwidth
B	To eliminate receiver interference from impulse noise sources
C	To enhance the reception of a specific frequency on a crowded band
D	To reduce interference from carriers in the receiver passband

15. - G4B03

Which of the following is the best instrument to use when checking the keying waveform of a CW transmitter?

Select	Answer
A	A sidetone monitor
B	A wavemeter
C	An oscilloscope
D	A field strength meter

16. - G4C09

How can a ground loop be avoided?

Select	Answer
A	Connect all ground conductors to a single point
B	Avoid using lock washers and star washers when making ground connections
C	Connect the AC neutral conductor to the ground wire
D	Connect all ground conductors in series

17. - G4D02

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

Select	Answer
A	It increases average power
B	It reduces harmonic distortion
C	It increases peak 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	Harmonic radiation may increase
C	Short antennas can only receive circularly polarized signals
D	Short antennas are more likely to cause distortion of transmitted signals

19. - G5A02

What is reactance?

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

20. - G5B05

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

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

21. - G5C06

What is the RMS voltage across a 500-turn secondary winding in a transformer if the 2250-turn primary is connected to 120 VAC?

Select	Answer
A	26.7 volts
B	2370 volts
C	540 volts
D	5.9 volts

22. - G6A12

What is the primary purpose of a screen grid in a vacuum tube?

Select	Answer
A	To increase efficiency
B	To increase the control grid resistance
C	To reduce grid-to-plate capacitance
D	To decrease plate resistance

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	Longer life
D	Faster response time

24. - G7A05

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

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

25. - G7B01

Complex digital circuitry can often be replaced by what type of integrated circuit?

Select	Answer
A	Charge-coupled device
B	Phase detector
C	Window comparator
D	Microcontroller

26. - G7C02

Which circuit is used to combine signals from the carrier oscillator and speech amplifier then send the result to the filter in some single sideband phone transmitters?

Select	Answer
A	Balanced modulator
B	Detector
C	IF amplifier
D	Discriminator

27. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

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

28. - G8B08

Why is it important to know the duty cycle of the mode you are using when transmitting?

Select	Answer
A	All of these choices are correct
B	To aid in tuning your transmitter
C	To allow time for the other station to break in during a transmission
D	Some modes have high duty cycles which could exceed the transmitter's average power rating.

29. - G8C02

How many data bits are sent in a single PSK31 character?

Select	Answer
A	The number varies
B	5
C	8
D	7

30. - G9A05

How does the attenuation of coaxial cable change as the frequency of the signal it is carrying increases?

Select	Answer
A	Attenuation reaches a maximum at approximately 18 MHz
B	Attenuation decreases
C	Attenuation increases
D	Attenuation is independent of frequency

31. - G9B12

What is the approximate length for a 1/4 wave vertical antenna cut for 28.5 MHz?

Select	Answer
A	16 feet
B	21 feet
C	8 feet
D	11 feet

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 the same
D	About twice as much

33. - G9D02

Which of the following is an advantage of an NVIS antenna?

Select	Answer
A	High forward gain
B	High vertical angle radiation for working stations within a radius of a few hundred kilometers
C	Low vertical angle radiation for working stations out to ranges of several thousand kilometers
D	All of these choices are correct

34. - G0A06

What precaution should be taken when installing a ground-mounted antenna?

Select	Answer
A	It should not be installed in a wet area
B	It should be installed such that it is protected against unauthorized access
C	It should not be installed higher than you can reach
D	It should limited to 10 feet in height

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 together with all other grounds
D	They must be bonded to all buried water and gas lines