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. - G1A11

When General Class licensees are not permitted to use the entire voice portion of a particular band, which portion of the voice segment is generally available to them?

Select	Answer
A	The upper frequency end on frequencies below 7.3 MHz and the lower end on frequencies above 14.150 MHz
B	The lower frequency end on frequencies below 7.3 MHz and the upper end on frequencies above 14.150 MHz
C	The upper frequency end
D	The lower frequency end

2. - G1B09

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

Select	Answer
A	Only when there is no other means of communications readily available
B	Never
C	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
D	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

3. - G1C02

What is the maximum transmitting power an amateur station may use on the 12-meter band?

Select	Answer
A	An effective radiated power equivalent to 100 watts from a half-wave dipole
B	50 watts PEP output
C	200 watts PEP output
D	1500 watts PEP output

4. - G1D08

Which of the following criteria must be met for a non-U.S. citizen to be an accredited Volunteer Examiner?

Select	Answer
A	The person's home citizenship must be in ITU region 2
B	The person must be a resident of the U.S. for a minimum of 5 years
C	None of these choices is correct; a non-U.S. citizen cannot be a Volunteer Examiner
D	The person must hold an FCC granted Amateur Radio license of General Class or above

5. - G1E13

On what bands may automatically controlled stations transmitting RTTY or data emissions communicate with other automatically controlled digital stations?

Select	Answer
A	Anywhere in the 1.25-meter or shorter wavelength bands, and in specified segments of the 80-meter through 2-meter bands
B	Only in the non-phone Extra Class segments of the bands
C	Anywhere in the non-phone segments of the 10-meter or shorter wavelength bands
D	On any band segment where digital operation is permitted

6. - G2A10

Which of the following statements is true of voice VOX operation versus PTT operation?

Select	Answer
A	It provides more power output
B	It allows "hands free" operation
C	The received signal is more natural sounding
D	It occupies less bandwidth

7. - G2B12

When is an amateur station allowed to use any means at its disposal to assist another station in distress?

Select	Answer
A	At any time when transmitting in an organized net
B	Only on authorized HF frequencies
C	Only when transmitting in RACES
D	At any time during an actual emergency

8. - G2C07

When sending CW, what does a "C" mean when added to the RST report?

Select	Answer
A	Chirpy or unstable signal
B	Key clicks
C	100 percent copy
D	Report was read from an S meter rather than estimated

9. - G2D10

What is QRP operation?

Select	Answer
A	Traffic relay procedure net operation
B	Remote piloted model control
C	Low power transmit operation
D	Transmission using Quick Response Protocol

10. - G2E14

What could be wrong if you cannot decode an RTTY or other FSK signal even though it is apparently tuned in properly?

Select	Answer
A	You may have selected the wrong baud rate
B	You may be listening on the wrong sideband
C	All of these choices are correct
D	The mark and space frequencies may be reversed

11. - G3A01

What is the significance of the sunspot number with regard to HF propagation?

Select	Answer
A	Lower sunspot numbers generally indicate greater probability of sporadic E propagation
B	A zero sunspot number indicate radio propagation is not possible on any band
C	All of these choices are correct.
D	Higher sunspot numbers generally indicate a greater probability of good propagation at higher frequencies

12. - G3B01

How might a sky-wave signal sound if it arrives at your receiver by both short path and long path propagation?

Select	Answer
A	The signal might be cancelled causing severe attenuation
B	Periodic fading approximately every 10 seconds
C	Signal strength increased by 3 dB
D	A well-defined echo might be heard

13. - G3C03

Why is the F2 region mainly responsible for the longest distance radio wave propagation?

Select	Answer
A	All of these choices are correct
B	Because it is the densest ionospheric layer
C	Because it does not absorb radio waves as much as other ionospheric regions
D	Because it is the highest ionospheric region

14. - G4A07

What condition can lead to permanent damage to a solid-state RF power amplifier?

Select	Answer
A	Insufficient drive power
B	Shorting the input signal to ground
C	Low input SWR
D	Excessive drive power

15. - G4B02

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

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

16. - G4C05

What might be the problem if you receive an RF burn when touching your equipment while transmitting on an HF band, assuming the equipment is connected to a ground rod?

Select	Answer
A	Insulated wire has been used for the ground wire
B	The ground wire has high impedance on that frequency
C	Flat braid rather than round wire has been used for the ground wire
D	The ground rod is resonant

17. - G4D10

How close to the lower edge of the 40-meter General Class phone segment should your displayed carrier frequency be when using 3 kHz wide LSB?

Select	Answer
A	At least 3 kHz above the edge of the segment
B	At least 3 kHz below the edge of the segment
C	Your displayed carrier frequency may be set at the edge of the segment
D	At least 1 kHz above the edge of the segment

18. - G4E02

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

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

19. - G5A12

What is one reason to use an impedance matching transformer?

Select	Answer
A	To reduce power supply ripple
B	To minimize radiation resistance
C	To maximize the transfer of power
D	To minimize transmitter power output

20. - G5B11

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

Select	Answer
A	0.707
B	2.00
C	1.00
D	1.414

21. - G5C12

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

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

22. - G6A08

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

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

23. - G6B05

What is meant when memory is characterized as non-volatile?

Select	Answer
A	The stored information is maintained even if power is removed
B	It is resistant to high temperatures
C	It is resistant to radiation damage
D	The stored information cannot be changed once written

24. - G7A12

Which symbol in Figure G7-1 represents a multiple-winding transformer?

Select	Answer
A	Symbol 1
B	Symbol 4
C	Symbol 7
D	Symbol 6

25. - G7B10

Which of the following is a characteristic of a Class A amplifier?

Select	Answer
A	Low distortion
B	High Efficiency
C	No need for bias
D	Low standby power

26. - G7C08

What type of circuit is used in many FM receivers to convert signals coming from the IF amplifier to audio?

Select	Answer
A	Mixer
B	Phase inverter
C	Product detector
D	Discriminator

27. - G8A05

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

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

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	60 kHz
C	416.7 Hz
D	5 kHz

29. - G8C08

Which of the following statements is true about PSK31?

Select	Answer
A	Upper case letters use longer Varicode signals and thus slow down transmission
B	Varicode Error Correction is used to ensure accurate message reception
C	Higher power is needed as compared to RTTY for similar error rates
D	Upper case letters make the signal stronger

30. - G9A01

Which of the following factors determine the characteristic impedance of a parallel conductor antenna feed line?

Select	Answer
A	The distance between the centers of the conductors and the radius of the conductors
B	The distance between the centers of the conductors and the length of the line
C	The frequency of the signal and the length of the line
D	The radius of the conductors and the frequency of the signal

31. - G9B09

Which of the following is an advantage of a horizontally polarized as compared to a vertically polarized HF antenna?

Select	Answer
A	Shorter Radials
B	Lower ground reflection losses
C	Lower radiation resistance
D	Lower feed point impedance

32. - G9C12

Which of the following is an advantage of using a gamma match for impedance matching of a Yagi antenna to 50 ohm coax feed line?

Select	Answer
A	It does not require that the elements be insulated from the boom
B	It is useful for matching multiband antennas
C	It does not require any inductors or capacitors
D	All of these choices are correct

33. - G9D07

Which of the following describes a log periodic antenna?

Select	Answer
A	SWR varies periodically as a function of boom length
B	Length and spacing of the elements increase logarithmically from one end of the boom to the other
C	Gain varies logarithmically as a function of frequency
D	Impedance varies periodically as a function of frequency

34. - G0A07

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

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

35. - G0B06

Why must the metal enclosure of every item of station equipment be grounded?

Select	Answer
A	It ensures that the neutral wire is grounded
B	It prevents a blown fuse in the event of an internal short circuit
C	It ensures that hazardous voltages cannot appear on the chassis
D	It prevents signal overload

Figure G7-1