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. - G1A10

Which of the following frequencies is available to a control operator holding a General Class license?

Select	Answer
A	28.350 MHz
B	28.550 MHz
C	28.020 MHz
D	All of these choices are correct

2. - G1B05

When may music be transmitted by an amateur station?

Select	Answer
A	When it is unintentionally transmitted from the background at the transmitter
B	When it is transmitted on frequencies above 1215 MHz
C	When it is an incidental part of a manned space craft retransmission
D	At any time, as long as it produces no spurious emissions

3. - G1C10

What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 10-meter band?

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

4. - G1D10

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

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

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	On any band segment where digital operation is permitted
C	Only in the non-phone Extra Class segments of the bands
D	Anywhere in the non-phone segments of the 10-meter or shorter wavelength bands

6. - G2A01

Which sideband is most commonly used for voice communications on frequencies of 14 MHz or higher?

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

7. - G2B05

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

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

8. - G2C10

What does the Q signal "QRN" mean?

Select	Answer
A	Zero beat my signal
B	I am troubled by static
C	Stop sending
D	Send more slowly

9. - G2D10

What is QRP operation?

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

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 top of the SSB phone segment, near 14.325 MHz
C	At the bottom of the slow-scan TV segment, near 14.230 MHz
D	In the middle of the CW segment, near 14.100 MHz

11. - G3A08

Which of the following effects can a geomagnetic storm have on radio propagation?

Select	Answer
A	Improved ground-wave propagation
B	Improved high-latitude HF propagation
C	Degraded high-latitude HF propagation
D	Improved chances of UHF ducting

12. - G3B06

What usually happens to radio waves with frequencies below the LUF?

Select	Answer
A	They pass through the ionosphere
B	They are completely absorbed by the ionosphere
C	They are bent and trapped in the ionosphere to circle the Earth
D	They are bent back to the Earth

13. - G3C04

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

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

14. - G4A11

Which of the following is a use for the IF shift control on a receiver?

Select	Answer
A	To tune in stations that are slightly off frequency without changing your transmit frequency
B	To permit listening on a different frequency from that on which you are transmitting
C	To change frequency rapidly
D	To avoid interference from stations very close to the receive frequency

15. - G4B03

Which of the following is the best instrument to use when checking the keying waveform of a CW transmitter?

Select	Answer
A	A wavemeter
B	A sidetone monitor
C	An oscilloscope
D	A field strength meter

16. - G4C08

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

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

17. - G4D06

Where is an S meter found?

Select	Answer
A	In an SWR bridge
B	In a conductance bridge
C	In a receiver
D	In a transmitter

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 conversion efficiency from mechanical energy to electrical energy is less than 2 percent
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	All of these choices are correct

19. - G5A10

What unit is used to measure impedance?

Select	Answer
A	Volt
B	Watt
C	Ohm
D	Ampere

20. - G5B07

What value of an AC signal produces the same power dissipation in a resistor as a DC voltage of the same value?

Select	Answer
A	The reciprocal of the RMS value
B	The peak-to-peak value
C	The RMS value
D	The peak value

21. - G5C14

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

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

22. - G6A10

Which element of a triode vacuum tube is used to regulate the flow of electrons between cathode and plate?

Select	Answer
A	Trigger electrode
B	Screen Grid
C	Heater
D	Control grid

23. - G6B03

Which of the following is an advantage of CMOS integrated circuits compared to TTL integrated circuits?

Select	Answer
A	High power handling capability
B	Better suited for RF amplification
C	Better suited for power supply regulation
D	Low power consumption

24. - G7A07

What is the output waveform of an unfiltered full-wave rectifier connected to a resistive load?

Select	Answer
A	A series of DC pulses at the same frequency as the AC input
B	A steady DC voltage
C	A sine wave at half the frequency of the AC input
D	A series of DC pulses at twice the frequency of the AC input

25. - G7B06

What is a shift register?

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

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	Substantially lower
C	About the same
D	Twice the transmission line impedance

27. - G8A05

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

Select	Answer
A	Phase modulation
B	Frequency modulation
C	Frequency shift keying
D	Amplitude 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. - G8C01

Which of the following digital modes is designed to operate at extremely low signal strength on the HF bands?

Select	Answer
A	RTTY
B	Clover
C	JT9 and JT65
D	FSK441 and Hellschreiber

30. - G9A09

What standing wave ratio will result when connecting a 50 ohm feed line to a non-reactive load having 200 ohm impedance?

Select	Answer
A	2:1
B	4:1
C	1:2
D	1:4

31. - G9B04

What is the radiation pattern of a dipole antenna in free space in the plane of the conductor?

Select	Answer
A	It is a circle (equal radiation in all directions)
B	It is a figure-eight at right angles to the antenna
C	It is a figure-eight off both ends of the antenna
D	It has a pair of lobes on one side of the antenna and a single lobe on the other side

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 does not require any inductors or capacitors
C	It is useful for matching multiband antennas
D	All of these choices are correct

33. - G9D11

Which of the following is a disadvantage of multiband antennas?

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

34. - G0A09

What type of instrument can be used to accurately measure an RF field?

Select	Answer
A	A receiver with an S meter
B	An oscilloscope with a high-stability crystal marker generator
C	A calibrated field strength meter with a calibrated antenna
D	An SWR meter with a peak-reading function

35. - G0B08

What should be done by any person preparing to climb a tower that supports electrically powered devices?

Select	Answer
A	All of these choices are correct
B	Notify the electric company that a person will be working on the tower
C	Make sure all circuits that supply power to the tower are locked out and tagged
D	Unground the base of the tower