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	21300 kHz
B	18155 kHz
C	24900 kHz
D	14250 kHz

2. - G1B02

With which of the following conditions must beacon stations comply?

Select	Answer
A	There must be no more than one beacon signal transmitting in the same band from the same station location
B	A beacon station may not use automatic control
C	The frequency must be coordinated with the National Beacon Organization
D	The frequency must be posted on the Internet or published in a national periodical

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	1.8 kHz
B	2.8 kHz
C	3 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 Wireless Telecommunications Bureau
D	The Universal Licensing System

5. - G1E08

Which of the following is a requirement for a non-licensed person to communicate with a foreign Amateur Radio station from a station with an FCC-granted license at which an FCC licensed control operator is present?

Select	Answer
A	The control operator must have at least a General Class license
B	All of these choices are correct
C	Information must be exchanged in English
D	The foreign amateur station must be in a country with which the United States has a third party agreement

6. - G2A03

Which of the following is most commonly used for SSB voice communications in the VHF and UHF bands?

Select	Answer
A	Lower sideband
B	Vestigial sideband
C	Double sideband
D	Upper sideband

7. - G2B01

Which of the following is true concerning access to frequencies in non-emergency situations?

Select	Answer
A	Nets always have priority
B	Except during FCC declared emergencies, no one has priority access to frequencies
C	QSOs in progress always have priority
D	Contest operations must always yield to non-contest use of frequencies

8. - G2C03

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

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

9. - G2D11

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

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

10. - G2E13

Which communication system sometimes uses the Internet to transfer messages?

Select	Answer
A	Winlink
B	RTTY
C	Skywarn
D	ARES

11. - G3A12

What does the K-index indicate?

Select	Answer
A	The short term stability of the Earth's magnetic field
B	The solar radio flux at Boulder, Colorado
C	The relative position of sunspots on the surface of the Sun
D	The stability of the Sun's magnetic field

12. - G3B06

What usually happens to radio waves with frequencies below the LUF?

Select	Answer
A	They pass through the ionosphere
B	They are completely absorbed by the ionosphere
C	They are bent and trapped in the ionosphere to circle the Earth
D	They are bent back to the Earth

13. - G3C04

What does the term "critical angle" mean as used in radio wave propagation?

Select	Answer
A	The short path azimuth of a distant station
B	The lowest takeoff angle that will return a radio wave to the Earth under specific ionospheric conditions
C	The highest takeoff angle that will return a radio wave to the Earth under specific ionospheric conditions
D	The long path azimuth of a distant station

14. - G4A10

What is the purpose of an electronic keyer?

Select	Answer
A	Automatic transmit/receive switching
B	VOX operation
C	Automatic generation of strings of dots and dashes for CW operation
D	Computer interface for PSK and RTTY operation

15. - G4B13

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

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

16. - G4C07

What is one good way to avoid unwanted effects of stray RF energy in an amateur station?

Select	Answer
A	Use a ground loop for best conductivity
B	Install a few ferrite beads on the ground wire where it connects to your station
C	Install an RF filter in series with the ground wire
D	Connect all equipment grounds together

17. - G4D07

How much must the power output of a transmitter be raised to change the S meter reading on a distant receiver from S8 to S9?

Select	Answer
A	Approximately 8 times
B	Approximately 1.5 times
C	Approximately 4 times
D	Approximately 2 times

18. - G4E02

What is the purpose of a corona ball on a HF mobile antenna?

Select	Answer
A	To reduce the chance of damage if the antenna should strike an object
B	To reduce high voltage discharge from the tip of the antenna
C	To increase the "Q" of the antenna
D	To narrow the operating bandwidth of the antenna

19. - G5A02

What is reactance?

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

20. - G5B06

What is the output PEP from a transmitter if an oscilloscope measures 200 volts peak-to-peak across a 50 ohm dummy load connected to the transmitter output?

Select	Answer
A	1.4 watts
B	400 watts
C	353.5 watts
D	100 watts

21. - G5C12

What is the capacitance of a 20 microfarad capacitor connected in series with a 50 microfarad capacitor?

Select	Answer
A	1000 microfarads
B	70 microfarads
C	14.3 microfarads
D	0.07 microfarads

22. - G6A13

Why is the polarity of applied voltages important for polarized capacitors?

Select	Answer
A	The capacitor could overheat and explode
B	All of these choices are correct
C	Reverse voltages can destroy the dielectric layer of an electrolytic capacitor
D	Incorrect polarity can cause the capacitor to short-circuit

23. - G6B13

Which of these connector types is commonly used for RF connections at frequencies up to 150 MHz?

Select	Answer
A	PL-259
B	RJ-11
C	DB-25
D	Octal

24. - G7A04

What is the peak-inverse-voltage across the rectifier in a half-wave power supply?

Select	Answer
A	Two times the normal peak output voltage of the power supply
B	One-half the normal peak output voltage of the power supply
C	Equal to the normal output voltage of the power supply
D	One-half the normal output voltage of the power supply

25. - G7B08

How is the efficiency of an RF power amplifier determined?

Select	Answer
A	Multiply the RF input power by the reciprocal of the RF output power
B	Add the RF input power to the DC output power
C	Divide the DC input power by the DC output power
D	Divide the RF output power by the DC input power

26. - G7C10

How is Digital Signal Processor filtering accomplished?

Select	Answer
A	By converting the signal from digital to analog and taking the difference of mixing products
B	By using direct signal phasing
C	By differential spurious phasing
D	By converting the signal from analog to digital and using digital processing

27. - G8A02

What is the name of the process that changes the phase angle of an RF wave to convey information?

Select	Answer
A	Phase modulation
B	Phase convolution
C	Radian inversion
D	Angle convolution

28. - G8B04

What is the stage in a VHF FM transmitter that generates a harmonic of a lower frequency signal to reach the desired operating frequency?

Select	Answer
A	Multiplier
B	Mixer
C	Reactance modulator
D	Pre-emphasis network

29. - G8C02

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

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

30. - G9A05

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

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

31. - G9B01

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

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

32. - G9C04

Which statement about a three-element, single-band Yagi antenna is true?

Select	Answer
A	The director is normally the longest element
B	The reflector is normally the shortest element
C	The reflector is normally the longest element
D	All of the elements must be the same length

33. - G9D08

Why is a Beverage antenna not used for transmitting?

Select	Answer
A	All of these choices are correct
B	It has high losses compared to other types of antennas
C	It has poor directivity
D	Its impedance is too low for effective matching

34. - G0A12

What precaution should you take whenever you make adjustments or repairs to an antenna?

Select	Answer
A	All of these choices are correct
B	Ensure that you and the antenna structure are grounded
C	Wear a radiation badge
D	Turn off the transmitter and disconnect the feed line

35. - G0B14

Which of the following is covered by the National Electrical Code?

Select	Answer
A	Acceptable bandwidth limits
B	Acceptable modulation limits
C	RF exposure limits of the human body
D	Electrical safety inside the ham shack