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. - G1A06

Which of the following frequencies is within the General Class portion of the 75-meter phone band?

Select	Answer
A	1875 kHz
B	3900 kHz
C	4005 kHz
D	3750 kHz

2. - G1B12

Who or what determines "good engineering and good amateur practice" as applied to the operation of an amateur station in all respects not covered by the Part 97 rules?

Select	Answer
A	The Control Operator
B	The ITU
C	The FCC
D	The IEEE

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	5.6 kHz
B	2.8 kHz
C	3 kHz
D	1.8 kHz

4. - G1D03

On which of the following band segments may you operate if you are a Technician Class operator and have a CSCE for General Class privileges?

Select	Answer
A	Only on the Technician band segments until your license arrives in the mail
B	Only the Technician band segments until your upgrade is posted in the FCC database
C	On any General or Technician Class band segment
D	On any General or Technician Class band segment except 30-meters and 60-meters

5. - G1E07

With which foreign countries is third party traffic prohibited, except for messages directly involving emergencies or disaster relief communications?

Select	Answer
A	Countries in ITU Region 2
B	Any country which is not a member of the International Amateur Radio Union (IARU)
C	Every foreign country, unless there is a third party agreement in effect with that country
D	Countries in ITU Region 1

6. - G2A09

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

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

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 they seize your equipment for use in disaster communications
D	When the President's War Emergency Powers have been invoked

8. - G2C02

What should you do if a CW station sends "QRS"?

Select	Answer
A	Change frequency
B	Send slower
C	Increase your power
D	Repeat everything twice

9. - G2D07

Which of the following is required by the FCC rules when operating in the 60-meter band?

Select	Answer
A	You must keep a record of all third party traffic
B	If you are using other than a dipole antenna, you must keep a record of the gain of your antenna
C	You must keep a record of the manufacturer of your equipment and the antenna used
D	You must keep a record of the date, time, frequency, power level and stations worked

10. - G2E11

What is indicated on a waterfall display by one or more vertical lines adjacent to a PSK31 signal?

Select	Answer
A	Insufficient modulation
B	Long Path propagation
C	Overmodulation
D	Backscatter propagation

11. - G3A12

What does the K-index indicate?

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

12. - G3B02

Which of the following is a good indicator of the possibility of sky-wave propagation on the 6-meter band?

Select	Answer
A	Long skip sky-wave propagation on the 10-meter band
B	Long delayed echoes on the 10-meter band
C	Short skip sky-wave propagation on the 10-meter band
D	Severe attenuation of signals on the 10-meter 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 E layer is unstable 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 F layer absorbs signals at these frequencies during daylight hours

14. - G4A07

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

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

15. - G4B03

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

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

16. - G4C04

What is the effect on an audio device or telephone system if there is interference from a nearby CW transmitter?

Select	Answer
A	Severely distorted audio
B	On-and-off humming or clicking
C	A chirpy CW signal
D	A CW signal at a nearly pure audio frequency

17. - G4D10

How close to the lower edge of the 40-meter General Class phone segment should your displayed carrier frequency be when using 3 kHz wide LSB?

Select	Answer
A	At least 1 kHz above the edge of the segment
B	Your displayed carrier frequency may be set at the edge of the segment
C	At least 3 kHz below the edge of the segment
D	At least 3 kHz above the edge of the segment

18. - G4E07

Which of the following may cause interference to be heard in the receiver of an HF radio installed in a recent model vehicle?

Select	Answer
A	The battery charging system
B	All of these choices are correct
C	The vehicle control computer
D	The fuel delivery system

19. - G5A01

What is impedance?

Select	Answer
A	The opposition to the flow of current in an AC circuit
B	The force of repulsion between two similar electric fields
C	The electric charge stored by a capacitor
D	The inverse of resistance

20. - G5B13

What is the output PEP of an unmodulated carrier if an average reading wattmeter connected to the transmitter output indicates 1060 watts?

Select	Answer
A	2120 watts
B	1060 watts
C	1500 watts
D	530 watts

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. - 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 reduce stray capacitance
C	To avoid shorting the collector or drain voltage to ground
D	To increase the beta of the transistor

23. - G6B02

What is meant by the term MMIC?

Select	Answer
A	Military Manufactured Integrated Circuit
B	Multi Megabyte Integrated Circuit
C	Monolithic Microwave Integrated Circuit
D	Mode Modulated Integrated Circuit

24. - G7A04

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

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

25. - G7B09

What determines the frequency of an LC oscillator?

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

26. - G7C07

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

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

27. - G8A01

How is an FSK signal generated?

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

28. - G8B09

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

Select	Answer
A	It improves impedance matching of the antenna
B	It results in the best signal to noise ratio
C	It is required by FCC rules
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	Clover
B	JT9 and JT65
C	RTTY
D	FSK441 and Hellschreiber

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 decreases
C	Attenuation reaches a maximum at approximately 18 MHz
D	Attenuation increases

31. - G9B02

Which of the following is a common way to adjust the feed point impedance of a quarter wave ground plane vertical antenna to be approximately 50 ohms?

Select	Answer
A	Slope the radials downward
B	Slope the radials upward
C	Shorten the radials
D	Lengthen the radials

32. - G9C12

Which of the following is an advantage of using a gamma match for impedance matching of a Yagi antenna to 50 ohm coax feed line?

Select	Answer
A	It does not require that the elements be insulated from the boom
B	It is useful for matching multiband antennas
C	It does not require any inductors or capacitors
D	All of these choices are correct

33. - G9D11

Which of the following is a disadvantage of multiband antennas?

Select	Answer
A	They present low impedance on all design frequencies
B	They must be used with an antenna tuner
C	They have poor harmonic rejection
D	They must be fed with open wire line

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 limited to 10 feet in height
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. - G0B08

What should be done by any person preparing to climb a tower that supports electrically powered devices?

Select	Answer
A	Make sure all circuits that supply power to the tower are locked out and tagged
B	Unground the base of the tower
C	All of these choices are correct
D	Notify the electric company that a person will be working on the tower