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. - G1A14

In what ITU region is operation in the 7.175 to 7.300 MHz band permitted for a control operator holding an FCC issued General Class license?

Select	Answer
A	All three regions
B	Region 1
C	Region 3
D	Region 2

2. - G1B04

Which of the following must be true before amateur stations may provide communications to broadcasters for dissemination to the public?

Select	Answer
A	The FCC must have declared a state of emergency
B	All of these choices are correct
C	The communications must be approved by a local emergency preparedness official and conducted on officially designated frequencies
D	The communications must directly relate to the immediate safety of human life or protection of property and there must be no other means of communication reasonably available before or at the time of the event

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	1.8 kHz
B	3 kHz
C	5.6 kHz
D	2.8 kHz

4. - G1D07

Volunteer Examiners are accredited by what organization?

Select	Answer
A	The Wireless Telecommunications Bureau
B	The Universal Licensing System
C	A Volunteer Examiner Coordinator
D	The Federal Communications Commission

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

6. - G2A03

Which of the following is most commonly used for SSB voice communications in the VHF and UHF bands?

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

7. - G2B04

When selecting a CW transmitting frequency, what minimum separation should be used to minimize interference to stations on adjacent frequencies?

Select	Answer
A	150 to 500 Hz
B	1 to 3 kHz
C	3 to 6 kHz
D	5 to 50 Hz

8. - G2C08

What prosign is sent to indicate the end of a formal message when using CW?

Select	Answer
A	SK
B	AR
C	BK
D	KN

9. - G2D05

When is it permissible to communicate with amateur stations in countries outside the areas administered by the Federal Communications Commission?

Select	Answer
A	When the contact is with amateurs in any country except those whose administrations have notified the ITU that they object to such communications
B	Only when the foreign country is a member of the International Amateur Radio Union
C	Only when the foreign country has a formal third party agreement filed with the FCC
D	When the contact is with amateurs in any country as long as the communication is conducted in English

10. - G2E12

Which of the following describes a waterfall display?

Select	Answer
A	Frequency is horizontal, signal strength is vertical, time is intensity
B	Frequency is horizontal, signal strength is intensity, time is vertical
C	Frequency is vertical, signal strength is intensity, time is horizontal
D	Frequency is vertical, signal strength is horizontal, time is intensity

11. - G3A07

At what point in the solar cycle does the 20-meter band usually support worldwide propagation during daylight hours?

Select	Answer
A	Only at the minimum point of the solar cycle
B	At any point in the solar cycle
C	Only at the maximum point of the solar cycle
D	At the summer solstice

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

13. - G3C01

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

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

14. - G4A06

What type of device is often used to match transmitter output impedance to an impedance not equal to 50 ohms?

Select	Answer
A	Balanced modulator
B	Q Multiplier
C	SWR Bridge
D	Antenna coupler or antenna tuner

15. - G4B07

What signals are used to conduct a two-tone test?

Select	Answer
A	Two audio signals of the same frequency shifted 90 degrees
B	Two non-harmonically related audio signals
C	Two audio frequency range square wave signals of equal amplitude
D	Two swept frequency tones

16. - G4C10

What could be a symptom of a ground loop somewhere in your station?

Select	Answer
A	You receive reports of harmonic interference from your station
B	You receive reports of "hum" on your station's transmitted signal
C	The SWR reading for one or more antennas is suddenly very high
D	An item of station equipment starts to draw excessive amounts of current

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

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

19. - G5A08

Why is impedance matching important?

Select	Answer
A	So the source can deliver maximum power to the load
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 load will draw minimum power from the source

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	1500 watts
B	1060 watts
C	2120 watts
D	530 watts

21. - G5C12

What is the capacitance of a 20 microfarad capacitor connected in series with a 50 microfarad capacitor?

Select	Answer
A	0.07 microfarads
B	1000 microfarads
C	70 microfarads
D	14.3 microfarads

22. - G6A08

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

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

23. - G6B03

Which of the following is an advantage of CMOS integrated circuits compared to TTL integrated circuits?

Select	Answer
A	Better suited for RF amplification
B	High power handling capability
C	Better suited for power supply regulation
D	Low power consumption

24. - G7A06

What portion of the AC cycle is converted to DC by a full-wave rectifier?

Select	Answer
A	90 degrees
B	270 degrees
C	360 degrees
D	180 degrees

25. - G7B13

What is the reason for neutralizing the final amplifier stage of a transmitter?

Select	Answer
A	To eliminate self-oscillations
B	To limit the modulation index
C	To keep the carrier on frequency
D	To cut off the final amplifier during standby periods

26. - G7C01

Which of the following is used to process signals from the balanced modulator then send them to the mixer in some single sideband phone transmitters?

Select	Answer
A	IF amplifier
B	RF amplifier
C	Carrier oscillator
D	Filter

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 using a transceiver's computer data interface protocol to change frequencies
C	By keying an FM transmitter with a sub-audible tone
D	By reconfiguring the CW keying input to act as a tone generator

28. - G8B03

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

Select	Answer
A	Phase inverting
B	Cancellation
C	Synthesizing
D	Heterodyning

29. - G8C02

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

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

30. - G9A15

What is the effect of transmission line loss on SWR measured at the input to the line?

Select	Answer
A	The higher the transmission line loss, the more the SWR will read artificially low
B	Transmission line loss does not affect the SWR measurement
C	The higher the transmission line loss, the more the SWR will read artificially high
D	The higher the transmission line loss, the more accurate the SWR measurement will be

31. - G9B11

What is the approximate length for a 1/2 wave dipole antenna cut for 3.550 MHz?

Select	Answer
A	84 feet
B	42 feet
C	131 feet
D	263 feet

32. - G9C04

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

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

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 narrows the main lobe in azimuth
C	It allows simultaneous vertical and horizontal polarization
D	It allows quick selection of vertical or horizontal polarization

34. - G0A03

How can you determine that your station complies with FCC RF exposure regulations?

Select	Answer
A	By calculation based on computer modeling
B	All of these choices are correct
C	By calculation based on FCC OET Bulletin 65
D	By measurement of field strength using calibrated equipment

35. - G0B12

What is the purpose of a power supply interlock?

Select	Answer
A	To shut down the unit if it becomes too hot
B	To prevent unauthorized changes to the circuit that would void the manufacturer's warranty
C	To shut off the power supply if too much voltage is produced
D	To ensure that dangerous voltages are removed if the cabinet is opened