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	3560 kHz
B	2560 kHz
C	1855 kHz
D	3650 kHz

2. - G1B11

How does the FCC require an amateur station to be operated in all respects not specifically covered by the Part 97 rules?

Select	Answer
A	In conformance with the rules of the IARU
B	In conformance with good engineering and good amateur practice
C	All of these choices are correct
D	In conformance with Amateur Radio custom

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. - G1D10

What is the minimum age that one must be to qualify as an accredited Volunteer Examiner?

Select	Answer
A	18 years
B	12 years
C	21 years
D	There is no age limit

5. - G1E03

What is required to conduct communications with a digital station operating under automatic control outside the automatic control band segments?

Select	Answer
A	No third party traffic maybe be transmitted
B	The station initiating the contact must be under local or remote control
C	The interrogating transmission must be made by another automatically controlled station
D	The control operator of the interrogating station must hold an Extra Class license

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	Lower sideband
D	Double sideband

7. - G2B01

Which of the following is true concerning access to frequencies in non-emergency situations?

Select	Answer
A	Contest operations must always yield to non-contest use of frequencies
B	Nets always have priority
C	Except during FCC declared emergencies, no one has priority access to frequencies
D	QSOs in progress always have priority

8. - G2C06

What does the term "zero beat" mean in CW operation?

Select	Answer
A	Matching the speed of the transmitting station
B	Sending without error
C	Operating split to avoid interference on frequency
D	Matching your transmit frequency to the frequency of a received signal

9. - G2D03

What skills learned during hidden transmitter hunts are of help to the Amateur Auxiliary?

Select	Answer
A	Identification of out of band operation
B	Hunters have an opportunity to transmit on non-amateur frequencies
C	Direction finding used to locate stations violating FCC Rules
D	Identification of different call signs

10. - G2E12

Which of the following describes a waterfall display?

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

11. - G3A05

What is the solar flux index?

Select	Answer
A	A count of sunspots which is adjusted for solar emissions
B	A measure of solar radiation at 10.7 centimeters wavelength
C	Another name for the American sunspot number
D	A measure of the highest frequency that is useful for ionospheric propagation between two points on the Earth

12. - G3B03

Which of the following applies when selecting a frequency for lowest attenuation when transmitting on HF?

Select	Answer
A	Select a frequency just above the critical frequency
B	Select a frequency just below the critical frequency
C	Select a frequency just below the MUF
D	Select a frequency just above the LUF

13. - G3C13

What is Near Vertical Incidence Sky-wave (NVIS) propagation?

Select	Answer
A	Short distance MF or HF propagation using high elevation angles
B	Long path HF propagation at sunrise and sunset
C	Double hop propagation near the LUF
D	Propagation near the MUF

14. - G4A15

Which of the following can be a symptom of transmitted RF being picked up by an audio cable carrying AFSK data signals between a computer and a transceiver?

Select	Answer
A	All of these choices are correct
B	Frequent connection timeouts
C	The VOX circuit does not un-key the transmitter
D	The transmitter signal is distorted

15. - G4B08

Which of the following instruments may be used to monitor relative RF output when making antenna and transmitter adjustments?

Select	Answer
A	A multimeter
B	An antenna noise bridge
C	A field strength meter
D	A Q meter

16. - G4C10

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

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

17. - G4D01

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

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

18. - G4E08

What is the name of the process by which sunlight is changed directly into electricity?

Select	Answer
A	Photon decomposition
B	Photovoltaic conversion
C	Photosynthesis
D	Photon emission

19. - G5A07

What happens when the impedance of an electrical load is equal to the output impedance of a power source, assuming both impedances are resistive?

Select	Answer
A	The electrical load is shorted
B	No current can flow through the circuit
C	The source delivers minimum power to the load
D	The source can deliver maximum power to the load

20. - G5B03

How many watts of electrical power are used if 400 VDC is supplied to an 800 ohm load?

Select	Answer
A	200 watts
B	0.5 watts
C	3200 watts
D	400 watts

21. - G5C16

Why is the conductor of the primary winding of many voltage step up transformers larger in diameter than the conductor of the secondary winding?

Select	Answer
A	To insure that the volume of the primary winding is equal to the volume of the secondary winding
B	To prevent parasitic oscillations due to resistive losses in the primary
C	To accommodate the higher current of the primary
D	To improve the coupling between the primary and secondary

22. - G6A16

What will happen to the resistance if the temperature of a resistor is increased?

Select	Answer
A	It will stay the same
B	It will become time dependent
C	It will change depending on the resistor's temperature coefficient
D	It will change depending on the resistor's reactance coefficient

23. - G6B04

What is meant by the term ROM?

Select	Answer
A	Resistor Operated Memory
B	Resistant to Overload Memory
C	Read Only Memory
D	Random Operational Memory

24. - G7A10

Which symbol in figure G7-1 represents a Zener diode?

Select	Answer
A	Symbol 4
B	Symbol 1
C	Symbol 11
D	Symbol 5

25. - G7B09

What determines the frequency of an LC oscillator?

Select	Answer
A	The time delay of the lag circuit
B	The number of stages in the divider
C	The inductance and capacitance in the tank circuit
D	The number of stages in the counter

26. - G7C06

What should be the impedance of a low-pass filter as compared to the impedance of the transmission line into which it is inserted?

Select	Answer
A	Substantially higher
B	Twice the transmission line impedance
C	Substantially lower
D	About the same

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	Phase modulation
D	Frequency modulation

28. - G8B09

Why is it good to match receiver bandwidth to the bandwidth of the operating mode?

Select	Answer
A	It results in the best signal to noise ratio
B	It improves impedance matching of the antenna
C	It minimizes power consumption in the receiver
D	It is required by FCC rules

29. - G8C08

Which of the following statements is true about PSK31?

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

30. - G9A07

What must be done to prevent standing waves on an antenna feed line?

Select	Answer
A	The antenna feed point must be at DC ground potential
B	The antenna feed point impedance must be matched to the characteristic impedance of the feed line
C	The feed line must be cut to a length equal to an even number of physical half wavelengths
D	The feed line must be cut to a length equal to an odd number of electrical quarter wavelengths

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

32. - G9C01

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

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

33. - G9D04

What is the primary purpose of antenna traps?

Select	Answer
A	To notch spurious frequencies
B	To prevent out of band operation
C	To permit multiband operation
D	To provide balanced feed point impedance

34. - G0A12

What precaution should you take whenever you make adjustments or repairs to an antenna?

Select	Answer
A	All of these choices are correct
B	Wear a radiation badge
C	Turn off the transmitter and disconnect the feed line
D	Ensure that you and the antenna structure are grounded

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 ensure that dangerous voltages are removed if the cabinet is opened
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

Figure G7-1