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. - G1A08

Which of the following frequencies is within the General Class portion of the 80-meter band?

Select	Answer
A	1855 kHz
B	2560 kHz
C	3560 kHz
D	3650 kHz

2. - G1B05

When may music be transmitted by an amateur station?

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

3. - G1C09

What is the maximum symbol rate permitted for RTTY or data emission transmitted on the 1.25-meter and 70-centimeter bands?

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

4. - G1D09

How long is a Certificate of Successful Completion of Examination (CSCE) valid for exam element credit?

Select	Answer
A	For as long as your current license is valid
B	180 days
C	30 days
D	365 days

5. - G1E05

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

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

6. - G2A11

What does the expression "CQ DX" usually indicate?

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

7. - G2B05

What is the customary minimum frequency separation between SSB signals under normal conditions?

Select	Answer
A	Approximately 6 kHz
B	Approximately 10 kHz
C	Between 150 and 500 Hz
D	Approximately 3 kHz

8. - G2C05

What is the best speed to use when answering a CQ in Morse code?

Select	Answer
A	At the standard calling speed of 5 wpm
B	The fastest speed at which you are comfortable copying
C	A slow speed until contact is established
D	The speed at which the CQ was sent

9. - G2D06

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

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

10. - G2E10

Which of the following is a way to establish contact with a digital messaging system gateway station?

Select	Answer
A	Send QRL in Morse code
B	Transmit a connect message on the station's published frequency
C	Respond when the station broadcasts its SSID
D	Send an email to the system control operator

11. - G3A04

Which of the following are least reliable for long distance communications during periods of low solar activity?

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

12. - G3B06

What usually happens to radio waves with frequencies below the LUF?

Select	Answer
A	They are bent back to the Earth
B	They are completely absorbed by the ionosphere
C	They are bent and trapped in the ionosphere to circle the Earth
D	They pass through the ionosphere

13. - G3C08

Why are HF scatter signals in the skip zone usually weak?

Select	Answer
A	Propagations is through ducts in F region which absorb most of the energy
B	Propagation is through ground waves which absorb most of the signal energy
C	Signals are scattered from the magnetosphere which is not a good reflector
D	Only a small part of the signal energy is scattered into the skip zone

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. - G4B06

What is an advantage of a digital voltmeter as compared to an analog voltmeter?

Select	Answer
A	Better precision for most uses
B	Better for RF measurements
C	Better for measuring computer circuits
D	Faster response

16. - G4C12

Which of the following is an advantage of a receiver DSP IF filter as compared to an analog filter?

Select	Answer
A	Fewer digital components are required
B	The DSP filter is much more effective at VHF frequencies
C	Mixing products are greatly reduced
D	A wide range of filter bandwidths and shapes can be created

17. - G4D01

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

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

18. - G4E02

What is the purpose of a corona ball on a HF mobile antenna?

Select	Answer
A	To reduce the chance of damage if the antenna should strike an object
B	To reduce high voltage discharge from the tip of the antenna
C	To increase the "Q" of the antenna
D	To narrow the operating bandwidth of the antenna

19. - G5A05

How does an inductor react to AC?

Select	Answer
A	As the frequency of the applied AC increases, the reactance decreases
B	As the amplitude of the applied AC increases, the reactance increases
C	As the amplitude of the applied AC increases, the reactance decreases
D	As the frequency of the applied AC increases, the reactance increases

20. - G5B11

What is the ratio of peak envelope power to average power for an unmodulated carrier?

Select	Answer
A	1.414
B	0.707
C	2.00
D	1.00

21. - G5C03

Which of the following components should be added to an existing resistor to increase the resistance?

Select	Answer
A	A capacitor in parallel
B	A resistor in parallel
C	A resistor in series
D	A capacitor in series

22. - G6A10

Which element of a triode vacuum tube is used to regulate the flow of electrons between cathode and plate?

Select	Answer
A	Heater
B	Screen Grid
C	Control grid
D	Trigger electrode

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 family of multiple circuit connectors suitable for audio and control signals
C	A DC power connector rated for currents between 30 and 50 amperes
D	A special connector for microwave interfacing

24. - G7A02

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

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

25. - G7B08

How is the efficiency of an RF power amplifier determined?

Select	Answer
A	Divide the DC input power by the DC 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	Multiply the RF input power by the reciprocal of the RF 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	Balanced modulator
D	IF amplifier

27. - G8A08

Which of the following is an effect of overmodulation?

Select	Answer
A	Frequency drift
B	Insufficient audio
C	Insufficient bandwidth
D	Excessive bandwidth

28. - G8B07

What is the frequency deviation for a 12.21 MHz reactance modulated oscillator in a 5 kHz deviation, 146.52 MHz FM phone transmitter?

Select	Answer
A	101.75 Hz
B	5 kHz
C	60 kHz
D	416.7 Hz

29. - G8C02

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

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

30. - G9A04

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

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

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	Shorten the radials
B	Slope the radials downward
C	Lengthen the radials
D	Slope the radials upward

32. - G9C11

What is the purpose of a gamma match used with Yagi antennas?

Select	Answer
A	To match the relatively high feed point impedance to 50 ohms
B	To increase the main lobe gain
C	To match the relatively low feed point impedance to 50 ohms
D	To increase the front-to-back ratio

33. - G9D02

Which of the following is an advantage of an NVIS antenna?

Select	Answer
A	All of these choices are correct
B	High forward gain
C	Low vertical angle radiation for working stations out to ranges of several thousand kilometers
D	High vertical angle radiation for working stations within a radius of a few hundred kilometers

34. - G0A02

Which of the following properties is important in estimating whether an RF signal exceeds the maximum permissible exposure (MPE)?

Select	Answer
A	All of these choices are correct
B	Its frequency
C	Its duty cycle
D	Its power density

35. - G0B04

Which of the following is a primary reason for not placing a gasoline-fueled generator inside an occupied area?

Select	Answer
A	Danger of engine over torque
B	Danger of carbon monoxide poisoning
C	Lack of nitrogen for adequate combustion
D	Lack of oxygen for adequate combustion