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. - G1A07

Which of the following frequencies is within the General Class portion of the 20-meter phone band?

Select	Answer
A	14005 kHz
B	14105 kHz
C	14405 kHz
D	14305 kHz

2. - G1B06

When is an amateur station permitted to transmit secret codes?

Select	Answer
A	To control a space station
B	During a declared communications emergency
C	Only when the information is of a routine, personal nature
D	Only with Special Temporary Authorization from the FCC

3. - G1C10

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

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

4. - G1D07

Volunteer Examiners are accredited by what organization?

Select	Answer
A	A Volunteer Examiner Coordinator
B	The Federal Communications Commission
C	The Universal Licensing System
D	The Wireless Telecommunications Bureau

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

6. - G2A05

Which mode of voice communication is most commonly used on the HF amateur bands?

Select	Answer
A	Double sideband
B	Phase modulation
C	Frequency modulation
D	Single sideband

7. - G2B05

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

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

8. - G2C10

What does the Q signal "QRN" mean?

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

9. - G2D10

What is QRP operation?

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

10. - G2E02

How can a PACTOR modem or controller be used to determine if the channel is in use by other PACTOR stations?

Select	Answer
A	Put the modem or controller in a mode which allows monitoring communications without a connection
B	Transmit UI packets several times and wait to see if there is a response from another PACTOR station
C	Send the message: "Is this frequency in use?"
D	Unplug the data connector temporarily and see if the channel-busy indication is turned off

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	The Sun's rotation on its axis
C	The position of the Moon in its orbit
D	Long term oscillations in the upper atmosphere

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

13. - G3C06

What is a characteristic of HF scatter signals?

Select	Answer
A	They have high intelligibility
B	All of these choices are correct
C	They have a wavering sound
D	They have very large swings in signal strength

14. - G4A13

What is one reason to use the attenuator function that is present on many HF transceivers?

Select	Answer
A	To reduce the transmitter power when driving a linear amplifier
B	To reduce signal overload due to strong incoming signals
C	To reduce power consumption when operating from batteries
D	To slow down received CW signals for better copy

15. - G4B02

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

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

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 an additional insulating jacket to the cable
C	Adding series capacitors to the conductors
D	Adding shunt inductors to the conductors

17. - G4D05

How does a signal that reads 20 dB over S9 compare to one that reads S9 on a receiver, assuming a properly calibrated S meter?

Select	Answer
A	It is 20 times more powerful
B	It is 10 times less powerful
C	It is 20 times less powerful
D	It is 100 times more powerful

18. - G4E01

What is the purpose of a capacitance hat on a mobile antenna?

Select	Answer
A	To increase the power handling capacity of a whip antenna
B	To allow remote tuning
C	To allow automatic band changing
D	To electrically lengthen a physically short antenna

19. - G5A05

How does an inductor react to AC?

Select	Answer
A	As the amplitude of the applied AC increases, the reactance increases
B	As the frequency of the applied AC increases, the reactance decreases
C	As the amplitude of the applied AC increases, the reactance decreases
D	As the frequency of the applied AC increases, the reactance increases

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

21. - G5C03

Which of the following components should be added to an existing resistor to increase the resistance?

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

22. - G6A07

What are the stable operating points for a bipolar transistor used as a switch in a logic circuit?

Select	Answer
A	Its peak and valley current points
B	Its saturation and cutoff regions
C	Its enhancement and depletion modes
D	Its active region (between the cutoff and saturation regions)

23. - G6B17

What is the general description of a DIN type connector?

Select	Answer
A	A DC power connector rated for currents between 30 and 50 amperes
B	A family of multiple circuit connectors suitable for audio and control signals
C	A special watertight connector for use in marine applications
D	A special connector for microwave interfacing

24. - G7A06

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

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

25. - G7B14

Which of the following describes a linear amplifier?

Select	Answer
A	An amplifier used as a frequency multiplier
B	An amplifier in which the output preserves the input waveform
C	A Class C high efficiency amplifier
D	Any RF power amplifier used in conjunction with an amateur transceiver

26. - G7C01

Which of the following is used to process signals from the balanced modulator then send them to the mixer in some single sideband phone transmitters?

Select	Answer
A	RF amplifier
B	IF amplifier
C	Filter
D	Carrier oscillator

27. - G8A10

What is meant by the term flat-topping when referring to a single sideband phone transmission?

Select	Answer
A	The transmitter's automatic level control (ALC) is properly adjusted
B	Signal distortion caused by insufficient collector current
C	Signal distortion caused by excessive drive
D	The transmitter's carrier is properly suppressed

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	Reactance modulator
B	Pre-emphasis network
C	Multiplier
D	Mixer

29. - G8C11

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

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

30. - G9A10

What standing wave ratio will result when connecting a 50 ohm feed line to a non-reactive load having 10 ohm impedance?

Select	Answer
A	2:1
B	1:5
C	50:1
D	5:1

31. - G9B05

How does antenna height affect the horizontal (azimuthal) radiation pattern of a horizontal dipole HF antenna?

Select	Answer
A	If the antenna is less than 1/2 wavelength high, the azimuthal pattern is almost omnidirectional
B	Antenna height has no effect on the pattern
C	If the antenna is less than 1/2 wavelength high, radiation off the ends of the wire is eliminated
D	If the antenna is too high, the pattern becomes unpredictable

32. - G9C07

What does "front-to-back ratio" mean in reference to a Yagi antenna?

Select	Answer
A	The ratio of forward gain to dipole gain
B	The relative position of the driven element with respect to the reflectors and directors
C	The number of directors versus the number of reflectors
D	The power radiated in the major radiation lobe compared to the power radiated in exactly the opposite direction

33. - G9D06

Which of the following is an advantage of a log periodic antenna?

Select	Answer
A	Harmonic suppression
B	Wide bandwidth
C	Polarization diversity
D	Higher gain per element than a Yagi antenna

34. - G0A11

What precaution should you take if you install an indoor transmitting antenna?

Select	Answer
A	Locate the antenna close to your operating position to minimize feed line radiation
B	Make sure that MPE limits are not exceeded in occupied areas
C	Make sure the antenna is properly shielded
D	Position the antenna along the edge of a wall to reduce parasitic radiation

35. - G0B01

Which wire or wires in a four-conductor connection should be attached to fuses or circuit breakers in a device operated from a 240 VAC single phase source?

Select	Answer
A	All wires
B	Only the ground wire
C	Only the neutral wire
D	Only the two wires carrying voltage