Alternating Current vs Direct Current - General Questions (4)

Directions to Solve

Alternating Current vs Direct Current - General Questions

25. 

What does the CRT oscilloscope display?
A. voltage and period
B. current and frequency
C. rms voltage and current
D. frequency and voltage

Answer: Option A

Explanation:

No answer description available for this question.

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26. 

The current is flowing in what direction?

mcq6_1005_1
A. clockwise
B. counterclockwise
C. in both directions at the same time
D. 50% of the time clockwise and 50% of the time counterclockwise

Answer: Option D

Explanation:

No answer description available for this question

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27. 

A test equipment item that has the ability to produce either square, triangular, or sawtooth waveforms is called:
A. a function generator
B. a radio frequency generator
C. an audio frequency generator
D. a frequency meter or counter

Answer: Option A

Explanation:

No answer description available for this question.

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28. 

What is the average value of a 12 V peak wave?
A. 3.82 V
B. 4.24 V
C. 7.64 V
D. 9.42 V

Answer: Option C

Explanation:

No answer description available for this question

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29. 

Which percentages of full-amplitude rise time are used for a pulse wave?
A. 0 to 50 percent
B. 0 to 100 percent
C. 5 to 95 percent
D. 10 to 90 percent

Answer: Option D

Explanation:

No answer description available for this question

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30. 

A sine wave reaches maximum positive voltage at:
A. 90°
B. 0°
C. –90°
D. 360°

Answer: Option A

Explanation:

No answer description available for this question.

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31. 

Why is ac current transfer more effective than dc current transfer over long distances?
A. due to the height of power lines
B. due to the use of ac generators
C. due to step-up and step-down transformers reducing I2R losses
D. due to very high voltages

Answer: Option C

Explanation:

No answer description available for this question

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32. 

Test equipment selection enables the technician to both generate signals and:
A. change circuit conditions
B. inject signals
C. sense circuit conditions
D. change signal frequencies

Answer: Option C

Explanation:

No answer description available for this question

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