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	18155 kHz
B	24900 kHz
C	14250 kHz
D	21300 kHz

2. - G1B07

What are the restrictions on the use of abbreviations or procedural signals in the Amateur Service?

Select	Answer
A	They are not permitted
B	Only "Q" signals are permitted
C	Only "10 codes" are permitted
D	They may be used if they do not obscure the meaning of a message

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	300 baud
C	1200 baud
D	19.6 kilobaud

4. - G1D05

Which of the following must a person have before they can be an administering VE for a Technician Class license examination?

Select	Answer
A	Receipt of a CSCE for General Class
B	An FCC General Class or higher license and VEC accreditation
C	Notification to the FCC that you want to give an examination
D	Possession of a properly obtained telegraphy license

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 relating to Amateur Radio or remarks of a personal character, or messages relating to emergencies or disaster relief
C	Any messages, as long as the text of the message is recorded in the station log
D	Only messages for other licensed amateurs

6. - G2A04

Which mode is most commonly used for voice communications on the 17-meter and 12-meter bands?

Select	Answer
A	Lower sideband
B	Double sideband
C	Vestigial sideband
D	Upper sideband

7. - G2B07

Which of the following complies with good amateur practice when choosing a frequency on which to initiate a call?

Select	Answer
A	Follow the voluntary band plan for the operating mode you intend to use
B	Identify your station by transmitting your call sign at least 3 times
C	Check to see if the channel is assigned to another station
D	All of these choices are correct

8. - G2C05

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

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

9. - G2D02

Which of the following are objectives of the Amateur Auxiliary?

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

10. - G2E11

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

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

11. - G3A09

What effect does a high sunspot number have on radio communications?

Select	Answer
A	Long-distance communication in the upper HF and lower VHF range is enhanced
B	Microwave communications become unstable
C	High-frequency radio signals become weak and distorted
D	Frequencies above 300 MHz become usable for long-distance communication

12. - G3B05

What usually happens to radio waves with frequencies below the MUF and above the LUF when they are sent into the ionosphere?

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

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 F layer is unstable during daylight hours
B	The D layer absorbs signals at these frequencies during daylight hours
C	The E layer is unstable during daylight hours
D	The F layer absorbs signals at these frequencies during daylight hours

14. - G4A01

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

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

15. - G4B11

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

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

16. - G4C09

How can a ground loop be avoided?

Select	Answer
A	Connect all ground conductors to a single point
B	Avoid using lock washers and star washers when making ground connections
C	Connect the AC neutral conductor to the ground wire
D	Connect all ground conductors in series

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

18. - G4E03

Which of the following direct, fused power connections would be the best for a 100 watt HF mobile installation?

Select	Answer
A	To the alternator or generator using resistor wire
B	To the battery using resistor wire
C	To the battery using heavy gauge wire
D	To the alternator or generator using heavy gauge wire

19. - G5A01

What is impedance?

Select	Answer
A	The electric charge stored by a capacitor
B	The force of repulsion between two similar electric fields
C	The opposition to the flow of current in an AC circuit
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	530 watts
C	1060 watts
D	1500 watts

21. - G5C08

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

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

22. - G6A10

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

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

23. - G6B10

What two devices in an Amateur Radio station might be connected using a USB interface?

Select	Answer
A	Power supply and amplifier
B	Amplifier and antenna
C	Microphone and transceiver
D	Computer and transceiver

24. - G7A02

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

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

25. - G7B12

Which of these classes of amplifiers has the highest efficiency?

Select	Answer
A	Class AB
B	Class A
C	Class B
D	Class C

26. - G7C05

Which of the following is an advantage of a transceiver controlled by a direct digital synthesizer (DDS)?

Select	Answer
A	Relatively high power output
B	Wide tuning range and no need for band switching
C	Variable frequency with the stability of a crystal oscillator
D	Relatively low power consumption

27. - G8A08

Which of the following is an effect of overmodulation?

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

28. - G8B01

What receiver stage combines a 14.250 MHz input signal with a 13.795 MHz oscillator signal to produce a 455 kHz intermediate frequency (IF) signal?

Select	Answer
A	VFO
B	Mixer
C	BFO
D	Discriminator

29. - G8C04

Which of the following describes Baudot code?

Select	Answer
A	A code using SELCAL and LISTEN
B	A 5-bit code with additional start and stop bits
C	A 7-bit code with start, stop and parity bits
D	A code using error detection and correction

30. - G9A03

What is the characteristic impedance of flat ribbon TV type twinlead?

Select	Answer
A	300 ohms
B	50 ohms
C	75 ohms
D	100 ohms

31. - G9B05

How does antenna height affect the horizontal (azimuthal) radiation pattern of a horizontal dipole HF antenna?

Select	Answer
A	If the antenna is less than 1/2 wavelength high, radiation off the ends of the wire is eliminated
B	Antenna height has no effect on the pattern
C	If the antenna is less than 1/2 wavelength high, the azimuthal pattern is almost omnidirectional
D	If the antenna is too high, the pattern becomes unpredictable

32. - G9C09

How does the gain of two 3-element horizontally polarized Yagi antennas spaced vertically 1/2 wavelength apart typically compare to the gain of a single 3-element Yagi?

Select	Answer
A	Approximately 3 dB higher
B	Approximately 9 dB higher
C	Approximately 1.5 dB higher
D	Approximately 6 dB higher

33. - G9D05

What is an advantage of vertical stacking of horizontally polarized Yagi antennas?

Select	Answer
A	It narrows the main lobe in elevation
B	It allows simultaneous vertical and horizontal polarization
C	It narrows the main lobe in azimuth
D	It allows quick selection of vertical or horizontal polarization

34. - G0A07

What effect does transmitter duty cycle have when evaluating RF exposure?

Select	Answer
A	High duty cycle transmitters are exempt from RF exposure requirements
B	Low duty cycle transmitters are exempt from RF exposure evaluation requirements
C	A higher transmitter duty cycle permits greater short-term exposure levels
D	A lower transmitter duty cycle permits greater short-term exposure levels

35. - G0B02

What is the minimum wire size that may be safely used for a circuit that draws up to 20 amperes of continuous current?

Select	Answer
A	AWG number 16
B	AWG number 8
C	AWG number 20
D	AWG number 12