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. - G1A02

On which of the following bands is phone operation prohibited?

Select	Answer
A	30 meters
B	12 meters
C	17 meters
D	160 meters

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	All of these choices are correct
B	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
C	The communications must be approved by a local emergency preparedness official and conducted on officially designated frequencies
D	The FCC must have declared a state of emergency

3. - G1C07

What is the maximum symbol rate permitted for RTTY or data emission transmission on the 20-meter band?

Select	Answer
A	300 baud
B	1200 baud
C	19.6 kilobaud
D	56 kilobaud

4. - G1D04

Which of the following is a requirement for administering a Technician Class license examination?

Select	Answer
A	At least two General Class or higher VEs must be present, but only one need be Extra Class
B	At least two General Class or higher VEs must be present
C	At least three General Class or higher VEs must observe the examination
D	At least three VEs of Technician Class or higher must observe the examination

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

6. - G2A11

What does the expression "CQ DX" usually indicate?

Select	Answer
A	A distress call
B	A general call for any station
C	The caller is listening for a station in Germany
D	The caller is looking for any station outside their own country

7. - G2B12

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

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

8. - G2C04

What does the Q signal "QRL?" mean?

Select	Answer
A	"Are you listening only for a specific station?"
B	"Are you operating full break-in" or "Can you operate full break-in?"
C	"Are you busy?", or "Is this frequency in use?"
D	"Will you keep the frequency clear?"

9. - G2D11

Which HF antenna would be the best to use for minimizing interference?

Select	Answer
A	An isotropic antenna
B	A quarter-wave vertical antenna
C	A directional antenna
D	An omnidirectional antenna

10. - G2E08

In what segment of the 20-meter band are most PSK31 operations commonly found?

Select	Answer
A	Below the RTTY segment, near 14.070 MHz
B	At the bottom of the slow-scan TV segment, near 14.230 MHz
C	In the middle of the CW segment, near 14.100 MHz
D	At the top of the SSB phone segment, near 14.325 MHz

11. - G3A10

What causes HF propagation conditions to vary periodically in a 28 day cycle?

Select	Answer
A	Cyclic variation in the Earth's radiation belts
B	Long term oscillations in the upper atmosphere
C	The position of the Moon in its orbit
D	The Sun's rotation on its axis

12. - G3B04

What is a reliable way to determine if the MUF is high enough to support skip propagation between your station and a distant location on frequencies between 14 and 30 MHz?

Select	Answer
A	Listen for signals from an international beacon in the frequency range you plan to use
B	Send a series of dots on the band and listen for echoes from your signal
C	Check the strength of TV signals from Western Europe
D	Check the strength of signals in the MF AM broadcast band

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	Double hop propagation near the LUF
C	Propagation near the MUF
D	Long path HF propagation at sunrise and sunset

14. - G4A09

Why is a time delay sometimes included in a transmitter keying circuit?

Select	Answer
A	To allow time for a warning signal to be sent to other stations
B	To allow time for transmit-receive changeover operations to complete properly before RF output is allowed
C	To allow the transmitter power regulators to charge properly
D	To prevent stations from interfering with one another

15. - G4B01

What item of test equipment contains horizontal and vertical channel amplifiers?

Select	Answer
A	An oscilloscope
B	An ohmmeter
C	A signal generator
D	An ammeter

16. - G4C08

Which of the following would reduce RF interference caused by common-mode current on an audio cable?

Select	Answer
A	Adding series capacitors to the conductors
B	Adding an additional insulating jacket to the cable
C	Placing a ferrite choke around the cable
D	Adding shunt inductors to the conductors

17. - G4D08

What frequency range is occupied by a 3 kHz LSB signal when the displayed carrier frequency is set to 7.178 MHz?

Select	Answer
A	7.175 to 7.178 MHz
B	7.178 to 7.184 MHz
C	7.178 to 7.181 MHz
D	7.1765 to 7.1795 MHz

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	All of these choices are correct
B	The voltage and current ratings of such systems are not compatible with amateur equipment
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. - G5A08

Why is impedance matching important?

Select	Answer
A	To ensure that the resistance and reactance in the circuit are equal
B	So the source can deliver maximum power to the load
C	To ensure that there is less resistance than reactance in the circuit
D	So the load will draw minimum power from the source

20. - G5B05

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

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

21. - G5C14

Which of the following components should be added to an inductor to increase the inductance?

Select	Answer
A	A capacitor in series
B	An inductor in series
C	An inductor in parallel
D	A resistor in parallel

22. - G6A15

Which of the following is an advantage of an electrolytic capacitor?

Select	Answer
A	Inexpensive RF capacitor
B	High capacitance for a given volume
C	Tight tolerance
D	Much less leakage than any other type

23. - G6B04

What is meant by the term ROM?

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

24. - G7A09

Which symbol in figure G7-1 represents a field effect transistor?

Select	Answer
A	Symbol 4
B	Symbol 2
C	Symbol 5
D	Symbol 1

25. - G7B06

What is a shift register?

Select	Answer
A	A clocked array of circuits that passes data in steps along the array
B	A digital mixer
C	An array of operational amplifiers used for tri-state arithmetic operations
D	An analog mixer

26. - G7C04

What circuit is used to combine signals from the IF amplifier and BFO and send the result to the AF amplifier in some single sideband receivers?

Select	Answer
A	Balanced modulator
B	RF oscillator
C	IF filter
D	Product detector

27. - G8A03

What is the name of the process that changes the instantaneous frequency of an RF wave to convey information?

Select	Answer
A	Frequency convolution
B	Frequency conversion
C	Frequency transformation
D	Frequency modulation

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	5 kHz
B	101.75 Hz
C	416.7 Hz
D	60 kHz

29. - G8C11

How are the two separate frequencies of a Frequency Shift Keyed (FSK) signal identified?

Select	Answer
A	On and Off
B	Mark and Space
C	High and Low
D	Dot and Dash

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	25 and 30 ohms
C	80 and 100 ohms
D	50 and 75 ohms

31. - G9B09

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

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

32. - G9C03

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

Select	Answer
A	The director is normally the shortest element
B	Low feed point impedance increases bandwidth
C	The reflector is normally the shortest element
D	The driven element is the longest element

33. - G9D04

What is the primary purpose of antenna traps?

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

34. - G0A03

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

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

35. - G0B14

Which of the following is covered by the National Electrical Code?

Select	Answer
A	RF exposure limits of the human body
B	Acceptable modulation limits
C	Electrical safety inside the ham shack
D	Acceptable bandwidth limits

Figure G7-1