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. - G1A12

Which of the following applies when the FCC rules designate the Amateur Service as a secondary user on a band?

Select	Answer
A	Amateur stations must record the call sign of the primary service station before operating on a frequency assigned to that station
B	Amateur stations are allowed to use the band only during emergencies
C	Amateur stations are allowed to use the band only if they do not cause harmful interference to primary users
D	Amateur stations may only operate during specific hours of the day, while primary users are permitted 24 hour use of the band

2. - G1B01

What is the maximum height above ground to which an antenna structure may be erected without requiring notification to the FAA and registration with the FCC, provided it is not at or near a public use airport?

Select	Answer
A	200 feet
B	100 feet
C	300 feet
D	50 feet

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	5.6 kHz
B	2.8 kHz
C	1.8 kHz
D	3 kHz

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

5. - G1E04

Which of the following conditions require a licensed Amateur Radio operator to take specific steps to avoid harmful interference to other users or facilities?

Select	Answer
A	When using a band where the Amateur Service is secondary
B	When a station is transmitting spread spectrum emissions
C	When operating within one mile of an FCC Monitoring Station
D	All of these choices are correct

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	Lower sideband
C	Vestigial sideband
D	Double sideband

7. - G2B05

What is the customary minimum frequency separation between SSB signals under normal conditions?

Select	Answer
A	Approximately 3 kHz
B	Between 150 and 500 Hz
C	Approximately 6 kHz
D	Approximately 10 kHz

8. - G2C02

What should you do if a CW station sends "QRS"?

Select	Answer
A	Change frequency
B	Increase your power
C	Repeat everything twice
D	Send slower

9. - G2D09

What information is traditionally contained in a station log?

Select	Answer
A	Band and/or frequency of the contact
B	All of these choices are correct
C	Date and time of contact
D	Call sign of station contacted and the signal report given

10. - G2E04

What segment of the 20-meter band is most often used for digital transmissions?

Select	Answer
A	14.150 - 14.225 MHz
B	14.070 - 14.100 MHz
C	14.275 - 14.350 MHz
D	14.000 - 14.050 MHz

11. - G3A07

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

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

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

13. - G3C04

What does the term "critical angle" mean as used in radio wave propagation?

Select	Answer
A	The short path azimuth of a distant station
B	The long path azimuth of a distant station
C	The lowest takeoff angle that will return a radio wave to the Earth under specific ionospheric conditions
D	The highest takeoff angle that will return a radio wave to the Earth under specific ionospheric conditions

14. - G4A01

What is the purpose of the "notch filter" found on many HF transceivers?

Select	Answer
A	To reduce interference from carriers in the receiver passband
B	To enhance the reception of a specific frequency on a crowded band
C	To eliminate receiver interference from impulse noise sources
D	To restrict the transmitter voice bandwidth

15. - G4B05

Why is high input impedance desirable for a voltmeter?

Select	Answer
A	It decreases battery consumption in the meter
B	It improves the frequency response
C	It decreases the loading on circuits being measured
D	It improves the resolution of the readings

16. - G4C06

What effect can be caused by a resonant ground connection?

Select	Answer
A	High RF voltages on the enclosures of station equipment
B	Corrosion of the ground rod
C	A ground loop
D	Overheating of ground straps

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 below the edge of the segment
B	At least 3 kHz above 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. - G4E09

What is the approximate open-circuit voltage from a fully illuminated silicon photovoltaic cell?

Select	Answer
A	1.38 VDC
B	0.2 VDC
C	0.5 VDC
D	0.02 VDC

19. - G5A09

What unit is used to measure reactance?

Select	Answer
A	Ampere
B	Farad
C	Ohm
D	Siemens

20. - G5B10

What percentage of power loss would result from a transmission line loss of 1 dB?

Select	Answer
A	25.9 percent
B	20.5 percent
C	12.2 percent
D	10.9 percent

21. - G5C06

What is the RMS voltage across a 500-turn secondary winding in a transformer if the 2250-turn primary is connected to 120 VAC?

Select	Answer
A	540 volts
B	2370 volts
C	5.9 volts
D	26.7 volts

22. - G6A01

What is the minimum allowable discharge voltage for maximum life of a standard 12 volt lead acid battery?

Select	Answer
A	6 volts
B	10.5 volts
C	12 volts
D	8.5 volts

23. - G6B02

What is meant by the term MMIC?

Select	Answer
A	Multi Megabyte Integrated Circuit
B	Military Manufactured Integrated Circuit
C	Monolithic Microwave Integrated Circuit
D	Mode Modulated Integrated Circuit

24. - G7A05

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

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

25. - G7B12

Which of these classes of amplifiers has the highest efficiency?

Select	Answer
A	Class C
B	Class A
C	Class AB
D	Class B

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. - G8A09

What control is typically adjusted for proper ALC setting on an amateur single sideband transceiver?

Select	Answer
A	The RF clipping level
B	Transmit audio or microphone gain
C	Attenuator level
D	Antenna inductance or capacitance

28. - G8B04

What is the stage in a VHF FM transmitter that generates a harmonic of a lower frequency signal to reach the desired operating frequency?

Select	Answer
A	Mixer
B	Reactance modulator
C	Pre-emphasis network
D	Multiplier

29. - G8C05

In the PACTOR protocol, what is meant by an NAK response to a transmitted packet?

Select	Answer
A	The receiver is reporting the packet was received without error
B	The receiver is busy decoding the packet
C	The entire file has been received correctly
D	The receiver is requesting the packet be retransmitted

30. - G9A12

What standing wave ratio will result when connecting a 50 ohm feed line to a non-reactive load having 25 ohm impedance?

Select	Answer
A	2.5:1
B	You cannot determine SWR from impedance values
C	2:1
D	1.25:1

31. - G9B07

How does the feed point impedance of a 1/2 wave dipole antenna change as the antenna is lowered below 1/4 wave above ground?

Select	Answer
A	It peaks at about 1/8 wavelength above ground
B	It is unaffected by the height above ground
C	It steadily decreases
D	It steadily increases

32. - G9C14

How does the forward gain of a two-element quad antenna compare to the forward gain of a three-element Yagi antenna?

Select	Answer
A	About 2/3 as much
B	About 1.5 times as much
C	About the same
D	About twice as much

33. - G9D10

Which of the following describes a Beverage antenna?

Select	Answer
A	A broad-band mobile antenna
B	A vertical antenna
C	A very long and low directional receiving antenna
D	A helical antenna for space reception

34. - G0A04

What does "time averaging" mean in reference to RF radiation exposure?

Select	Answer
A	The average time it takes RF radiation to have any long-term effect on the body
B	The total time of the exposure
C	The total RF exposure averaged over a certain time
D	The average amount of power developed by the transmitter over a specific 24 hour period

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