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. - G1A12

Which of the following applies when the FCC rules designate the Amateur Service as a secondary user on a band?

Select	Answer
A	Amateur stations may only operate during specific hours of the day, while primary users are permitted 24 hour use of the band
B	Amateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station
C	Amateur stations are allowed to use the band only if they do not cause harmful interference to primary users
D	Amateur stations are allowed to use the band only during emergencies

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

4. - G1D07

Volunteer Examiners are accredited by what organization?

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

5. - G1E02

When may a 10-meter repeater retransmit the 2-meter signal from a station having a Technician Class control operator?

Select	Answer
A	Only if the station on 10-meters is operating under a Special Temporary Authorization allowing such retransmission
B	Only if the 10-meter repeater control operator holds at least a General Class license
C	Under no circumstances
D	Only during an FCC declared general state of communications emergency

6. - G2A05

Which mode of voice communication is most commonly used on the HF amateur bands?

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

7. - G2B08

What is the "DX window" in a voluntary band plan?

Select	Answer
A	An FCC rule that prohibits contacts between stations within the United States and possessions in that portion of the band
B	A portion of the band that should not be used for contacts between stations within the 48 contiguous United States
C	An FCC rule that allows only digital contacts in that portion of the band
D	A portion of the band that has been voluntarily set aside for digital contacts only

8. - G2C06

What does the term "zero beat" mean in CW operation?

Select	Answer
A	Matching your transmit frequency to the frequency of a received signal
B	Operating split to avoid interference on frequency
C	Sending without error
D	Matching the speed of the transmitting station

9. - G2D05

When is it permissible to communicate with amateur stations in countries outside the areas administered by the Federal Communications Commission?

Select	Answer
A	Only when the foreign country is a member of the International Amateur Radio Union
B	When the contact is with amateurs in any country except those whose administrations have notified the ITU that they object to such communications
C	Only when the foreign country has a formal third party agreement filed with the FCC
D	When the contact is with amateurs in any country as long as the communication is conducted in English

10. - G2E13

Which communication system sometimes uses the Internet to transfer messages?

Select	Answer
A	RTTY
B	Skywarn
C	Winlink
D	ARES

11. - G3A11

Approximately how long is the typical sunspot cycle?

Select	Answer
A	11 years
B	8 minutes
C	40 hours
D	28 days

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. - G3C12

Which ionospheric layer is the most absorbent of long skip signals during daylight hours on frequencies below 10 MHz?

Select	Answer
A	The E layer
B	The D layer
C	The F2 layer
D	The F1 layer

14. - G4A01

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

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

15. - G4B11

Which of the following must be connected to an antenna analyzer when it is being used for SWR measurements?

Select	Answer
A	All of these choices are correct
B	Antenna and feed line
C	Transmitter
D	Receiver

16. - G4C01

Which of the following might be useful in reducing RF interference to audio frequency devices?

Select	Answer
A	Bypass capacitor
B	Reverse-biased diode
C	Bypass inductor
D	Forward-biased diode

17. - G4D05

How does a signal that reads 20 dB over S9 compare to one that reads S9 on a receiver, assuming a properly calibrated S meter?

Select	Answer
A	It is 20 times more powerful
B	It is 10 times less powerful
C	It is 20 times less powerful
D	It is 100 times more powerful

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

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 large spark produced at switch contacts when an inductor is de-energized
D	A property of ideal resistors in AC circuits

20. - G5B01

What dB change represents a two-times increase or decrease in power?

Select	Answer
A	Approximately 3 dB
B	Approximately 2 dB
C	Approximately 12 dB
D	Approximately 6 dB

21. - G5C15

What is the total resistance of a 10 ohm, a 20 ohm, and a 50 ohm resistor connected in parallel?

Select	Answer
A	10000 ohms
B	5.9 ohms
C	80 ohms
D	0.17 ohms

22. - G6A03

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

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

23. - G6B07

Which of the following is an advantage of an LED indicator compared to an incandescent indicator?

Select	Answer
A	Longer life
B	All of these choices are correct
C	Lower power consumption
D	Faster response time

24. - G7A02

Which of the following components are used in a power supply filter network?

Select	Answer
A	Quartz crystals
B	Capacitors and inductors
C	Diodes
D	Transformers and transducers

25. - G7B09

What determines the frequency of an LC oscillator?

Select	Answer
A	The time delay of the lag circuit
B	The inductance and capacitance in the tank circuit
C	The number of stages in the counter
D	The number of stages in the divider

26. - G7C11

What is meant by the term "software defined radio" (SDR)?

Select	Answer
A	A radio that uses crystal filters designed using software
B	A radio in which most major signal processing functions are performed by software
C	A computer model that can simulate performance of a radio to aid in the design process
D	A radio that provides computer interface for automatic logging of band and frequency

27. - G8A01

How is an FSK signal generated?

Select	Answer
A	By keying an FM transmitter with a sub-audible tone
B	By using a transceiver's computer data interface protocol to change frequencies
C	By changing an oscillator's frequency directly with a digital control signal
D	By reconfiguring the CW keying input to act as a tone generator

28. - G8B09

Why is it good to match receiver bandwidth to the bandwidth of the operating mode?

Select	Answer
A	It is required by FCC rules
B	It results in the best signal to noise ratio
C	It improves impedance matching of the antenna
D	It minimizes power consumption in the receiver

29. - G8C01

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

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

30. - G9A04

What might cause reflected power at the point where a feed line connects to an antenna?

Select	Answer
A	Feeding the antenna with unbalanced feed line
B	A difference between feed line impedance and antenna feed point impedance
C	Using more transmitter power than the antenna can handle
D	Operating an antenna at its resonant frequency

31. - G9B10

What is the approximate length for a 1/2 wave dipole antenna cut for 14.250 MHz?

Select	Answer
A	24 feet
B	8 feet
C	16 feet
D	32 feet

32. - G9C02

What is the approximate length of the driven element of a Yagi antenna?

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

33. - G9D07

Which of the following describes a log periodic antenna?

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

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	Post a warning sign that is clearly visible to the neighbor
B	Change to a non-polarized antenna with higher gain
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. - G0B07

Which of these choices should be observed when climbing a tower using a safety belt or harness?

Select	Answer
A	Ensure that all heavy tools are securely fastened to the belt D-ring
B	All of these choices are correct
C	Confirm that the belt is rated for the weight of the climber and that it is within its allowable service life
D	Never lean back and rely on the belt alone to support your weight