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	Region 3
B	Region 2
C	All three regions
D	Region 1

2. - G1B06

When is an amateur station permitted to transmit secret codes?

Select	Answer
A	Only when the information is of a routine, personal nature
B	Only with Special Temporary Authorization from the FCC
C	To control a space station
D	During a declared communications emergency

3. - G1C06

Which of the following is a limitation on transmitter power on the 1.8 MHz band?

Select	Answer
A	200 watts PEP output
B	1000 watts PEP output
C	1200 watts PEP output
D	1500 watts PEP output

4. - G1D07

Volunteer Examiners are accredited by what organization?

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

5. - G1E02

When may a 10-meter repeater retransmit the 2-meter signal from a station having a Technician Class control operator?

Select	Answer
A	Under no circumstances
B	Only if the station on 10-meters is operating under a Special Temporary Authorization allowing such retransmission
C	Only if the 10-meter repeater control operator holds at least a General Class license
D	Only during an FCC declared general state of communications emergency

6. - G2A02

Which of the following modes is most commonly used for voice communications on the 160-meter, 75-meter, and 40-meter bands?

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

7. - G2B02

What is the first thing you should do if you are communicating with another amateur station and hear a station in distress break in?

Select	Answer
A	Continue your communication because you were on the frequency first
B	Change to a different frequency
C	Immediately cease all transmissions
D	Acknowledge the station in distress and determine what assistance may be needed

8. - G2C11

What does the Q signal "QRV" mean?

Select	Answer
A	You are sending too fast
B	I am ready to receive messages
C	I am quitting for the day
D	There is interference on the frequency

9. - G2D04

Which of the following describes an azimuthal projection map?

Select	Answer
A	A map that shows the number of degrees longitude that an amateur satellite appears to move westward at the equator with each orbit
B	A map that shows true bearings and distances from a particular location
C	A map that shows accurate land masses
D	A map that shows the angle at which an amateur satellite crosses the equator

10. - G2E01

Which mode is normally used when sending an RTTY signal via AFSK with an SSB transmitter?

Select	Answer
A	USB
B	DSB
C	LSB
D	CW

11. - G3A16

What is a possible benefit to radio communications resulting from periods of high geomagnetic activity?

Select	Answer
A	Reduced long delayed echoes
B	Higher signal strength for HF signals passing through the polar regions
C	Auroras that can reflect VHF signals
D	Improved HF long path propagation

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 delayed echoes on the 10-meter band
B	Severe attenuation of signals on the 10-meter band
C	Short skip sky-wave propagation on the 10-meter band
D	Long skip sky-wave propagation on the 10-meter band

13. - G3C12

Which ionospheric layer is the most absorbent of long skip signals during daylight hours on frequencies below 10 MHz?

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

14. - G4A13

What is one reason to use the attenuator function that is present on many HF transceivers?

Select	Answer
A	To reduce signal overload due to strong incoming signals
B	To reduce power consumption when operating from batteries
C	To reduce the transmitter power when driving a linear amplifier
D	To slow down received CW signals for better copy

15. - G4B02

Which of the following is an advantage of an oscilloscope versus a digital voltmeter?

Select	Answer
A	Complex waveforms can be measured
B	Complex impedances can be easily measured
C	Input impedance is much lower
D	An oscilloscope uses less power

16. - G4C03

What sound is heard from an audio device or telephone if there is interference from a nearby single sideband phone transmitter?

Select	Answer
A	Clearly audible speech
B	A steady hum whenever the transmitter is on the air
C	On-and-off humming or clicking
D	Distorted speech

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

18. - G4E11

Which of the following is a disadvantage of using wind as the primary source of power for an emergency station?

Select	Answer
A	The voltage and current ratings of such systems are not compatible with amateur equipment
B	All of these choices are correct
C	A large energy storage system is needed to supply power when the wind is not blowing
D	The conversion efficiency from mechanical energy to electrical energy is less than 2 percent

19. - G5A03

Which of the following causes opposition to the flow of alternating current in an inductor?

Select	Answer
A	Conductance
B	Reactance
C	Reluctance
D	Admittance

20. - G5B05

How many watts are dissipated when a current of 7.0 milliamperes flows through 1.25 kilohms resistance?

Select	Answer
A	Approximately 11 milliwatts
B	Approximately 61 watts
C	Approximately 11 watts
D	Approximately 61 milliwatts

21. - G5C17

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

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

22. - G6A17

Which of the following is a reason not to use wire-wound resistors in an RF circuit?

Select	Answer
A	The resistor's internal capacitance would detune the circuit
B	The resistor's inductance could make circuit performance unpredictable
C	The resistor's tolerance value would not be adequate for such a circuit
D	The resistor could overheat

23. - G6B15

What is the main reason to use keyed connectors instead of non-keyed types?

Select	Answer
A	Higher current carrying capacity
B	All of these choices are correct
C	Reduced chance of incorrect mating
D	Prevention of use by unauthorized persons

24. - G7A03

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

Select	Answer
A	Equal to the normal peak output voltage of the power supply
B	One-quarter the normal output voltage of the power supply
C	Half the normal output voltage of the power supply
D	Double the normal peak 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 divider
C	The number of stages in the counter
D	The time delay of the lag circuit

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	Balanced modulator
B	Discriminator
C	IF amplifier
D	Detector

27. - G8A05

What type of modulation varies the instantaneous power level of the RF signal?

Select	Answer
A	Frequency shift keying
B	Amplitude modulation
C	Frequency modulation
D	Phase modulation

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	16 kHz
C	5 kHz
D	3 kHz

29. - G8C10

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

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

30. - G9A02

What are the typical characteristic impedances of coaxial cables used for antenna feed lines at amateur stations?

Select	Answer
A	500 and 750 ohms
B	50 and 75 ohms
C	25 and 30 ohms
D	80 and 100 ohms

31. - G9B01

What is one disadvantage of a directly fed random-wire HF antenna?

Select	Answer
A	It must be longer than 1 wavelength
B	You may experience RF burns when touching metal objects in your station
C	It is more effective on the lower HF bands than on the higher bands
D	It produces only vertically polarized radiation

32. - G9C01

Which of the following would increase the bandwidth of a Yagi antenna?

Select	Answer
A	Loading coils in series with the element
B	Tapered-diameter elements
C	Larger diameter elements
D	Closer element spacing

33. - G9D11

Which of the following is a disadvantage of multiband antennas?

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

34. - G0A01

What is one way that RF energy can affect human body tissue?

Select	Answer
A	It causes radiation poisoning
B	It heats body tissue
C	It causes the blood count to reach a dangerously low level
D	It cools body tissue

35. - G0B12

What is the purpose of a power supply interlock?

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