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. - G1A14

In what ITU region is operation in the 7.175 to 7.300 MHz band permitted for a control operator holding an FCC issued General Class license?

Select	Answer
A	All three regions
B	Region 2
C	Region 3
D	Region 1

2. - G1B09

When may an amateur station transmit communications in which the licensee or control operator has a pecuniary (monetary) interest?

Select	Answer
A	When other amateurs are being notified of the sale of apparatus normally used in an amateur station and such activity is not done on a regular basis
B	Never
C	Only when there is no other means of communications readily available
D	When other amateurs are being notified of the sale of any item with a monetary value less than $200 and such activity is not done on a regular basis

3. - G1C11

What is the maximum symbol rate permitted for RTTY or data emission transmissions on the 2-meter band?

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

4. - G1D03

On which of the following band segments may you operate if you are a Technician Class operator and have a CSCE for General Class privileges?

Select	Answer
A	On any General or Technician Class band segment
B	Only on the Technician band segments until your license arrives in the mail
C	Only the Technician band segments until your upgrade is posted in the FCC database
D	On any General or Technician Class band segment except 30-meters and 60-meters

5. - G1E11

Which of the following is the FCC term for an unattended digital station that transfers messages to and from the Internet?

Select	Answer
A	Locally controlled station
B	Automatically controlled digital station
C	Fail-safe digital station
D	Robotically controlled station

6. - G2A03

Which of the following is most commonly used for SSB voice communications in the VHF and UHF bands?

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

7. - G2B11

What frequency should be used to send a distress call?

Select	Answer
A	Only frequencies used by police, fire or emergency medical services
B	Only frequencies authorized for RACES or ARES stations
C	Whichever frequency has the best chance of communicating the distress message
D	Only frequencies that are within your operating privileges

8. - G2C03

What does it mean when a CW operator sends "KN" at the end of a transmission?

Select	Answer
A	Closing station now
B	Listening for novice stations
C	Operating full break-in
D	Listening only for a specific station or stations

9. - G2D04

Which of the following describes an azimuthal projection map?

Select	Answer
A	A map that shows the angle at which an amateur satellite crosses the equator
B	A map that shows accurate land masses
C	A map that shows true bearings and distances from a particular location
D	A map that shows the number of degrees longitude that an amateur satellite appears to move westward at the equator with each orbit

10. - G2E03

What symptoms may result from other signals interfering with a PACTOR or WINMOR transmission?

Select	Answer
A	Failure to establish a connection between stations
B	Long pauses in message transmission
C	Frequent retries or timeouts
D	All of these choices are correct

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

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

13. - G3C08

Why are HF scatter signals in the skip zone usually weak?

Select	Answer
A	Propagation is through ground waves which absorb most of the signal energy
B	Only a small part of the signal energy is scattered into the skip zone
C	Propagations is through ducts in F region which absorb most of the energy
D	Signals are scattered from the magnetosphere which is not a good reflector

14. - G4A04

What reading on the plate current meter of a vacuum tube RF power amplifier indicates correct adjustment of the plate tuning control?

Select	Answer
A	A slow, rhythmic oscillation
B	A pronounced dip
C	A pronounced peak
D	No change will be observed

15. - G4B14

What is an instance in which the use of an instrument with analog readout may be preferred over an instrument with a digital readout?

Select	Answer
A	When high precision is desired
B	When adjusting tuned circuits
C	When measuring the frequency of an oscillator
D	When testing logic circuits

16. - G4C03

What sound is heard from an audio device or telephone if there is interference from a nearby single sideband phone transmitter?

Select	Answer
A	On-and-off humming or clicking
B	A steady hum whenever the transmitter is on the air
C	Clearly audible speech
D	Distorted speech

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	7.178 to 7.181 MHz
B	7.175 to 7.178 MHz
C	7.178 to 7.184 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	The voltage and current ratings of such systems are not compatible with amateur equipment
B	A large energy storage system is needed to supply power when the wind is not blowing
C	The conversion efficiency from mechanical energy to electrical energy is less than 2 percent
D	All of these choices are correct

19. - G5A02

What is reactance?

Select	Answer
A	A large spark produced at switch contacts when an inductor is de-energized
B	A property of ideal resistors in AC circuits
C	Opposition to the flow of alternating current caused by capacitance or inductance
D	Opposition to the flow of direct current caused by resistance

20. - G5B01

What dB change represents a two-times increase or decrease in power?

Select	Answer
A	Approximately 12 dB
B	Approximately 2 dB
C	Approximately 3 dB
D	Approximately 6 dB

21. - G5C04

What is the total resistance of three 100 ohm resistors in parallel?

Select	Answer
A	0.33 ohms
B	0.30 ohms
C	33.3 ohms
D	300 ohms

22. - G6A19

How should the winding axes of two solenoid inductors be oriented to minimize their mutual inductance?

Select	Answer
A	In line
B	At right angles to each other
C	Interleaved
D	Parallel to each other

23. - G6B17

What is the general description of a DIN type connector?

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

24. - G7A02

Which of the following components are used in a power supply filter network?

Select	Answer
A	Transformers and transducers
B	Diodes
C	Quartz crystals
D	Capacitors and inductors

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 analog mixer
D	An array of operational amplifiers used for tri-state arithmetic operations

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

27. - G8A01

How is an FSK signal generated?

Select	Answer
A	By keying an FM transmitter with a sub-audible tone
B	By using a transceiver's computer data interface protocol to change frequencies
C	By changing an oscillator's frequency directly with a digital control signal
D	By reconfiguring the CW keying input to act as a tone generator

28. - G8B03

What is another term for the mixing of two RF signals?

Select	Answer
A	Cancellation
B	Heterodyning
C	Synthesizing
D	Phase inverting

29. - G8C02

How many data bits are sent in a single PSK31 character?

Select	Answer
A	The number varies
B	7
C	5
D	8

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 feed line must be cut to a length equal to an even number of physical half wavelengths
C	The antenna feed point impedance must be matched to the characteristic impedance of the feed line
D	The feed line must be cut to a length equal to an odd number of electrical quarter wavelengths

31. - G9B03

What happens to the feed point impedance of a ground plane antenna when its radials are changed from horizontal to sloping downward?

Select	Answer
A	It decreases
B	It increases
C	It stays the same
D	It reaches a maximum at an angle of 45 degrees

32. - G9C11

What is the purpose of a gamma match used with Yagi antennas?

Select	Answer
A	To match the relatively low feed point impedance to 50 ohms
B	To increase the front-to-back ratio
C	To match the relatively high feed point impedance to 50 ohms
D	To increase the main lobe gain

33. - G9D01

What does the term NVIS mean as related to antennas?

Select	Answer
A	Near Vertical Incidence sky-wave
B	Non-Varying Impedance Smoothing
C	Nearly Vertical Inductance System
D	Non-Varying Indicated SWR

34. - G0A01

What is one way that RF energy can affect human body tissue?

Select	Answer
A	It cools body tissue
B	It causes radiation poisoning
C	It heats body tissue
D	It causes the blood count to reach a dangerously low level

35. - G0B10

Which of the following is a danger from lead-tin solder?

Select	Answer
A	Tin in the solder can "cold flow" causing shorts in the circuit
B	Lead can contaminate food if hands are not washed carefully after handling the solder
C	RF energy can convert the lead into a poisonous gas
D	High voltages can cause lead-tin solder to disintegrate suddenly