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. - G1A13

What is the appropriate action if, when operating on either the 30-meter or 60-meter bands, a station in the primary service interferes with your contact?

Select	Answer
A	Increase your transmitter's power to overcome the interference
B	Notify the FCCs regional Engineer in Charge of the interference
C	Attempt to contact the station and request that it stop the interference
D	Move to a clear frequency or stop transmitting

2. - G1B05

When may music be transmitted by an amateur station?

Select	Answer
A	When it is unintentionally transmitted from the background at the transmitter
B	When it is transmitted on frequencies above 1215 MHz
C	When it is an incidental part of a manned space craft retransmission
D	At any time, as long as it produces no spurious emissions

3. - G1C08

What is the maximum symbol rate permitted for RTTY or data emission transmitted at frequencies below 28 MHz?

Select	Answer
A	56 kilobaud
B	19.6 kilobaud
C	300 baud
D	1200 baud

4. - G1D02

What license examinations may you administer when you are an accredited VE holding a General Class operator license?

Select	Answer
A	General only
B	Technician only
C	Extra, General and Technician
D	General and Technician

5. - G1E05

What types of messages for a third party in another country may be transmitted by an amateur station?

Select	Answer
A	Only messages relating to Amateur Radio or remarks of a personal character, or messages relating to emergencies or disaster relief
B	Any messages, as long as the text of the message is recorded in the station log
C	Only messages for other licensed amateurs
D	Any message, as long as the amateur operator is not paid

6. - G2A01

Which sideband is most commonly used for voice communications on frequencies of 14 MHz or higher?

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

7. - G2B06

What is a practical way to avoid harmful interference on an apparently clear frequency before calling CQ on CW or phone?

Select	Answer
A	Send the letter "V" in Morse code several times and listen for a response or say "test" several times and listen for a response
B	Send "QSY" on CW or if using phone, announce "the frequency is in use", then give your call and listen for a response
C	Listen for 2 minutes before calling CQ
D	Send "QRL?" on CW, followed by your call sign; or, if using phone, ask if the frequency is in use, followed by your call sign

8. - G2C08

What prosign is sent to indicate the end of a formal message when using CW?

Select	Answer
A	AR
B	SK
C	BK
D	KN

9. - G2D11

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

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

10. - G2E04

What segment of the 20-meter band is most often used for digital transmissions?

Select	Answer
A	14.275 - 14.350 MHz
B	14.070 - 14.100 MHz
C	14.150 - 14.225 MHz
D	14.000 - 14.050 MHz

11. - G3A14

How are radio communications usually affected by the charged particles that reach the Earth from solar coronal holes?

Select	Answer
A	HF communications are disturbed
B	HF communications are improved
C	VHF/UHF ducting is improved
D	VHF/UHF ducting is disturbed

12. - G3B01

How might a sky-wave signal sound if it arrives at your receiver by both short path and long path propagation?

Select	Answer
A	Signal strength increased by 3 dB
B	The signal might be cancelled causing severe attenuation
C	Periodic fading approximately every 10 seconds
D	A well-defined echo might be heard

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 F layer absorbs signals at these frequencies during daylight hours
B	The D 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. - G4A05

What is a reason to use Automatic Level Control (ALC) with an RF power amplifier?

Select	Answer
A	To reduce distortion due to excessive drive
B	To balance the transmitter audio frequency response
C	To reduce harmonic radiation
D	To increase overall efficiency

15. - G4B05

Why is high input impedance desirable for a voltmeter?

Select	Answer
A	It decreases the loading on circuits being measured
B	It decreases battery consumption in the meter
C	It improves the frequency response
D	It improves the resolution of the readings

16. - G4C02

Which of the following could be a cause of interference covering a wide range of frequencies?

Select	Answer
A	Lack of rectification of the transmitter's signal in power conductors
B	Not using a balun or line isolator to feed balanced antennas
C	Using a balun to feed an unbalanced antenna
D	Arcing at a poor electrical connection

17. - G4D06

Where is an S meter found?

Select	Answer
A	In a receiver
B	In an SWR bridge
C	In a transmitter
D	In a conductance bridge

18. - G4E03

Which of the following direct, fused power connections would be the best for a 100 watt HF mobile installation?

Select	Answer
A	To the battery using heavy gauge wire
B	To the alternator or generator using heavy gauge wire
C	To the alternator or generator using resistor wire
D	To the battery using resistor wire

19. - G5A04

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

Select	Answer
A	Reluctance
B	Admittance
C	Conductance
D	Reactance

20. - G5B10

What percentage of power loss would result from a transmission line loss of 1 dB?

Select	Answer
A	25.9 percent
B	10.9 percent
C	12.2 percent
D	20.5 percent

21. - G5C17

What is the value in nanofarads (nF) of a 22,000 pF capacitor?

Select	Answer
A	2.2 nF
B	0.22 nF
C	22 nF
D	220 nF

22. - G6A03

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

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

23. - G6B10

What two devices in an Amateur Radio station might be connected using a USB interface?

Select	Answer
A	Amplifier and antenna
B	Microphone and transceiver
C	Computer and transceiver
D	Power supply and amplifier

24. - G7A12

Which symbol in Figure G7-1 represents a multiple-winding transformer?

Select	Answer
A	Symbol 6
B	Symbol 4
C	Symbol 1
D	Symbol 7

25. - G7B01

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

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

26. - G7C07

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

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

27. - G8A09

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

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

28. - G8B08

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

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

29. - G8C09

What does the number 31 represent in "PSK31"?

Select	Answer
A	The approximate transmitted symbol rate
B	The number of characters that can be represented by PSK31
C	The version of the PSK protocol
D	The year in which PSK31 was invented

30. - G9A02

What are the typical characteristic impedances of coaxial cables used for antenna feed lines at amateur stations?

Select	Answer
A	80 and 100 ohms
B	25 and 30 ohms
C	50 and 75 ohms
D	500 and 750 ohms

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

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. - G9D03

At what height above ground is an NVIS antenna typically installed?

Select	Answer
A	Between 1/10 and 1/4 wavelength
B	As close to one wavelength as possible
C	Height is not critical as long as it is significantly more than 1/2 wavelength
D	As close to 1/2 wavelength as possible

34. - G0A12

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

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

35. - G0B06

Why must the metal enclosure of every item of station equipment be grounded?

Select	Answer
A	It prevents a blown fuse in the event of an internal short circuit
B	It prevents signal overload
C	It ensures that the neutral wire is grounded
D	It ensures that hazardous voltages cannot appear on the chassis

Figure G7-1