US Amateur Radio - General (Element 3, 2015-2019) Practice Test

Anonymous User

US Amateur Radio - General (Element 3, 2015-2019) Practice Test

Logging in (or registering) will help the system to select questions that you need to focus on.

1. - G1A01

On which of the following bands is a General Class license holder granted all amateur frequency privileges?

Select	Answer
A	160, 30, 17, 15, 12, and 10 meters
B	160, 80, 40, and 10 meters
C	160, 60, 30, 17, 12, and 10 meters
D	60, 20, 17, and 12 meters

2. - G1B05

When may music be transmitted by an amateur station?

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

3. - G1C06

Which of the following is a limitation on transmitter power on the 1.8 MHz band?

Select	Answer
A	200 watts PEP output
B	1200 watts PEP output
C	1500 watts PEP output
D	1000 watts PEP output

4. - G1D10

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

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

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

6. - G2A10

Which of the following statements is true of voice VOX operation versus PTT operation?

Select	Answer
A	It allows "hands free" operation
B	It provides more power output
C	The received signal is more natural sounding
D	It occupies less bandwidth

7. - G2B10

When may the FCC restrict normal frequency operations of amateur stations participating in RACES?

Select	Answer
A	When they declare a temporary state of communication emergency
B	Only when all amateur stations are instructed to stop transmitting
C	When the President's War Emergency Powers have been invoked
D	When they seize your equipment for use in disaster communications

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	Listening only for a specific station or stations
C	Closing station now
D	Operating full break-in

9. - G2D06

How is a directional antenna pointed when making a "long-path" contact with another station?

Select	Answer
A	Along the gray line
B	Toward the north
C	Toward the rising Sun
D	180 degrees from its short-path heading

10. - G2E06

What is the most common frequency shift for RTTY emissions in the amateur HF bands?

Select	Answer
A	85 Hz
B	850 Hz
C	425 Hz
D	170 Hz

11. - G3A12

What does the K-index indicate?

Select	Answer
A	The stability of the Sun'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 short term stability of the Earth's magnetic field

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

13. - G3C01

Which ionospheric layer is closest to the surface of the Earth?

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

14. - G4A07

What condition can lead to permanent damage to a solid-state RF power amplifier?

Select	Answer
A	Low input SWR
B	Insufficient drive power
C	Excessive drive power
D	Shorting the input signal to ground

15. - G4B05

Why is high input impedance desirable for a voltmeter?

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

16. - G4C11

Which of the following is a function of a digital signal processor?

Select	Answer
A	To increase antenna gain
B	To increase antenna bandwidth
C	To provide adequate grounding
D	To remove noise from received signals

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 2 times
B	Approximately 1.5 times
C	Approximately 4 times
D	Approximately 8 times

18. - G4E05

Which of the following most limits the effectiveness of an HF mobile transceiver operating in the 75-meter band?

Select	Answer
A	The antenna system
B	The wire gauge of the DC power line to the transceiver
C	"Picket Fencing" signal variation
D	FCC rules limiting mobile output power on the 75-meter band

19. - G5A08

Why is impedance matching important?

Select	Answer
A	So the load will draw minimum power from the source
B	To ensure that there is less resistance than reactance in the circuit
C	To ensure that the resistance and reactance in the circuit are equal
D	So the source can deliver maximum power to the load

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	20.5 percent
D	12.2 percent

21. - G5C08

What is the equivalent capacitance of two 5.0 nanofarad capacitors and one 750 picofarad capacitor connected in parallel?

Select	Answer
A	10.750 nanofarads
B	576.9 nanofarads
C	3583 picofarads
D	1733 picofarads

22. - G6A08

Why must the cases of some large power transistors be insulated from ground?

Select	Answer
A	To improve the power dissipation capability
B	To avoid shorting the collector or drain voltage to ground
C	To increase the beta of the transistor
D	To reduce stray capacitance

23. - G6B18

What is a type SMA connector?

Select	Answer
A	A type of push-on connector intended for high voltage applications
B	A connector designed for serial multiple access signals
C	A small threaded connector suitable for signals up to several GHz
D	A large bayonet connector usable at power levels in excess of 1 KW

24. - G7A12

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

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

25. - G7B10

Which of the following is a characteristic of a Class A amplifier?

Select	Answer
A	Low distortion
B	Low standby power
C	High Efficiency
D	No need for bias

26. - G7C11

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

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

27. - G8A07

Which of the following phone emissions uses the narrowest bandwidth?

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

28. - G8B03

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

Select	Answer
A	Heterodyning
B	Synthesizing
C	Phase inverting
D	Cancellation

29. - G8C02

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

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

30. - G9A10

What standing wave ratio will result when connecting a 50 ohm feed line to a non-reactive load having 10 ohm impedance?

Select	Answer
A	1:5
B	50:1
C	2:1
D	5:1

31. - G9B08

How does the feed point impedance of a 1/2 wave dipole change as the feed point is moved from the center toward the ends?

Select	Answer
A	It is unaffected by the location of the feed point
B	It peaks at about 1/8 wavelength from the end
C	It steadily increases
D	It steadily decreases

32. - G9C04

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

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

33. - G9D04

What is the primary purpose of antenna traps?

Select	Answer
A	To notch spurious frequencies
B	To provide balanced feed point impedance
C	To prevent out of band operation
D	To permit multiband operation

34. - G0A06

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

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

35. - G0B06

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

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

Figure G7-1