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	24900 kHz
B	14250 kHz
C	18155 kHz
D	21300 kHz

2. - G1B09

When may an amateur station transmit communications in which the licensee or control operator has a pecuniary (monetary) interest?

Select	Answer
A	When other amateurs are being notified of the sale of any item with a monetary value less than $200 and such activity is not done on a regular basis
B	When other amateurs are being notified of the sale of apparatus normally used in an amateur station and such activity is not done on a regular basis
C	Only when there is no other means of communications readily available
D	Never

3. - G1C04

Which of the following limitations apply to transmitter power on every amateur band?

Select	Answer
A	Power must be limited to 200 watts when transmitting between 14.100 MHz and 14.150 MHz
B	Power should be limited as necessary to avoid interference to another radio service on the frequency
C	Effective radiated power cannot exceed 1500 watts
D	Only the minimum power necessary to carry out the desired communications should be used

4. - G1D06

When must you add the special identifier "AG" after your call sign if you are a Technician Class licensee and have a CSCE for General Class operator privileges, but the FCC has not yet posted your upgrade on its website ?

Select	Answer
A	Whenever you operate using General Class frequency privileges
B	Whenever you operate on any amateur frequency
C	A special identifier is not required as long as your General Class license application has been filed with the FCC
D	Whenever you operate using Technician frequency privileges

5. - G1E01

Which of the following would disqualify a third party from participating in stating a message over an amateur station?

Select	Answer
A	The third party is speaking in a language other than English
B	The third party is a licensed amateur
C	The third party's amateur license has been revoked and not reinstated
D	The third party is not a U.S. citizen

6. - G2A11

What does the expression "CQ DX" usually indicate?

Select	Answer
A	A general call for any station
B	A distress call
C	The caller is looking for any station outside their own country
D	The caller is listening for a station in Germany

7. - G2B03

If propagation changes during your contact and you notice increasing interference from other activity on the same frequency, what should you do?

Select	Answer
A	Increase power to overcome interference
B	As a common courtesy, move your contact to another frequency
C	Tell the interfering stations to change frequency
D	Report the interference to your local Amateur Auxiliary Coordinator

8. - G2C10

What does the Q signal "QRN" mean?

Select	Answer
A	Stop sending
B	I am troubled by static
C	Send more slowly
D	Zero beat my signal

9. - G2D02

Which of the following are objectives of the Amateur Auxiliary?

Select	Answer
A	To coordinate repeaters for efficient and orderly spectrum usage
B	To conduct efficient and orderly amateur licensing examinations
C	To provide emergency and public safety communications
D	To encourage self-regulation and compliance with the rules by radio amateur operators

10. - G2E05

What is the standard sideband used to generate a JT65 or JT9 digital signal when using AFSK in any amateur band?

Select	Answer
A	USB
B	DSB
C	SSB
D	LSB

11. - G3A11

Approximately how long is the typical sunspot cycle?

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

12. - G3B04

What is a reliable way to determine if the MUF is high enough to support skip propagation between your station and a distant location on frequencies between 14 and 30 MHz?

Select	Answer
A	Send a series of dots on the band and listen for echoes from your signal
B	Check the strength of signals in the MF AM broadcast band
C	Listen for signals from an international beacon in the frequency range you plan to use
D	Check the strength of TV signals from Western Europe

13. - G3C06

What is a characteristic of HF scatter signals?

Select	Answer
A	All of these choices are correct
B	They have a wavering sound
C	They have high intelligibility
D	They have very large swings in signal strength

14. - G4A10

What is the purpose of an electronic keyer?

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

15. - G4B03

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

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

16. - G4C11

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

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

17. - G4D01

What is the purpose of a speech processor as used in a modern transceiver?

Select	Answer
A	Increase the intelligibility of transmitted phone signals during poor conditions
B	Increase transmitter bass response for more natural sounding SSB signals
C	Prevent distortion of voice signals
D	Decrease high-frequency voice output to prevent out of band operation

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

19. - G5A02

What is reactance?

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

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	100 watts
B	1.4 watts
C	353.5 watts
D	400 watts

21. - G5C17

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

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

22. - G6A12

What is the primary purpose of a screen grid in a vacuum tube?

Select	Answer
A	To increase the control grid resistance
B	To reduce grid-to-plate capacitance
C	To increase efficiency
D	To decrease plate resistance

23. - G6B17

What is the general description of a DIN type connector?

Select	Answer
A	A special watertight connector for use in marine applications
B	A DC power connector rated for currents between 30 and 50 amperes
C	A family of multiple circuit connectors suitable for audio and control signals
D	A special connector for microwave interfacing

24. - G7A03

What is the peak-inverse-voltage across the rectifiers in a full-wave bridge power supply?

Select	Answer
A	Half the normal output voltage of the power supply
B	Double the normal peak output voltage of the power supply
C	Equal to the normal peak output voltage of the power supply
D	One-quarter 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 RF output power by the DC input power
D	Divide the DC input power by the DC output power

26. - G7C02

Which circuit is used to combine signals from the carrier oscillator and speech amplifier then send the result to the filter in some single sideband phone transmitters?

Select	Answer
A	Detector
B	Discriminator
C	IF amplifier
D	Balanced modulator

27. - G8A10

What is meant by the term flat-topping when referring to a single sideband phone transmission?

Select	Answer
A	The transmitter's automatic level control (ALC) is properly adjusted
B	Signal distortion caused by insufficient collector current
C	Signal distortion caused by excessive drive
D	The transmitter's carrier is properly suppressed

28. - G8B06

What is the total bandwidth of an FM phone transmission having 5 kHz deviation and 3 kHz modulating frequency?

Select	Answer
A	8 kHz
B	5 kHz
C	3 kHz
D	16 kHz

29. - G8C10

How does forward error correction (FEC) allow the receiver to correct errors in received data packets?

Select	Answer
A	By using a parity bit with each character
B	By controlling transmitter output power for optimum signal strength
C	By transmitting redundant information with the data
D	By using the varicode character set

30. - G9A04

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

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

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	16 feet
C	8 feet
D	32 feet

32. - G9C07

What does "front-to-back ratio" mean in reference to a Yagi antenna?

Select	Answer
A	The power radiated in the major radiation lobe compared to the power radiated in exactly the opposite direction
B	The number of directors versus the number of reflectors
C	The ratio of forward gain to dipole gain
D	The relative position of the driven element with respect to the reflectors and directors

33. - G9D09

Which of the following is an application for a Beverage antenna?

Select	Answer
A	Directional transmitting for low HF bands
B	Portable direction finding at lower HF frequencies
C	Directional receiving for low HF bands
D	Portable direction finding at higher HF frequencies

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	Turn off the transmitter and disconnect the feed line
C	Wear a radiation badge
D	Ensure that you and the antenna structure are grounded

35. - G0B14

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

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