Question 1

What is the unit of measure for the power delivered to the load in a DC circuit?

Accepted Answer

A)   hertz
B)   volt-amperes
C)   VARs
D)   wattsE) A) and B)
F) B) and C)

Question 2

The number of cycles completed in one second is called a _____.

Accepted Answer

A)   cycle
B)   hertz
C)   frequency
D)   rotationE) All of the above
F) A) and B)

Question 3

The amplitude of a waveform is measured from _____.

Accepted Answer

A)   peak-to-peak
B)   zero to the highest value obtained in either direction
C)   zero to the RMS level
D)   zero to the effective levelE) B) and C)
F) A) and C) B

Question 4

Frequency is measured in _____.

Accepted Answer

A)   watts
B)   hertz
C)   amperes
D)   voltageE) All of the above
F) A) and B)

Question 5

What is the peak voltage of a 277 V RMS AC voltage?

Accepted Answer

A)   391.68 V
B)   434.85 V
C)   576.45 V
D)   695.90 VE) A) and B)
F) A) and C)

Question 6

Square waves are generally produced by electronic devices called _____.

Accepted Answer

A)   converters
B)   alternators
C)   oscillators
D)   rectifiersE) B) and D)
F) C) and D)

Question 7

When AC voltage is rectified and converted into DC, the resulting waveform is normally not pure, flat DC. The pulses that occur are called _____.

Accepted Answer

A)   harmonics
B)   cosines
C)   ripples
D)   peaksE) All of the above
F) A) and C)

Question 8

A term used to indicate the same value as the RMS value is the _____ value.

Accepted Answer

A)   average
B)   peak
C)   peak-to-peak
D)   effectiveE) C) and D)
F) All of the above

Question 9

Each complete waveform of 360 ° is called a _____.

Accepted Answer

A)   cycle
B)   hertz
C)   frequency
D)   rotationE) C) and D)
F) A) and C)

Question 10

In a DC circuit, the product of volts times the amperes is called the _____ power.

Accepted Answer

A)   apparent
B)   reactive
C)   true
D)   inductiveE) None of the above
F) All of the above C

Question 11

If an AC waveform is rectified and converted into DC, the voltage value that results is the _____ value.

Accepted Answer

A)   average
B)   peak
C)   peak-to-peak
D)   effectiveE) C) and D)
F) A) and B)

Question 12

What type of load contains pure resistance?

Accepted Answer

A)   capacitive
B)   inductive
C)   reactive
D)   resistiveE) A) and C)
F) A) and B)

Question 13

The square root of the mean of the square of the instantaneous currents is known as the _____.

Accepted Answer

A)   RMS
B)   peak
C)   peak-to-peak
D)   averageE) B) and C)
F) C) and D)

Question 14

Both AC and DC can be transformed.

Accepted Answer

A) True 
 B)False

Question 15

What is the RMS value of an AC voltage that has a 480 V peak?

Accepted Answer

A)   278.72 V
B)   305.76 V
C)   339.46 V
D)   453.53 VE) B) and C)
F) All of the above

Question 16

What is the most common of all AC waveforms?

Accepted Answer

A)   triangle
B)   sine
C)   pulsating
D)   cosineE) None of the above
F) All of the above B

Question 17

To help overcome the problem of skin effect in high-frequency circuits, conductors with a large amount of _______________ must be used.

Accepted Answer

The answer of To help overcome the problem of skin...

Question 18

Rotating machines normally produce a waveform called a _____ wave.

Accepted Answer

A)   cosine
B)   linear
C)   sine
D)   pulsatingE) B) and C)
F) A) and C)

Question 19

When current rises and falls at the same rate as the voltage and reverses the direction of flow when the voltage reverses polarity, the current is said to be _____ with the voltage.

Accepted Answer

A)   in phase
B)   out of phase
C)   in leading phase
D)   in lagging phaseE) B) and C)
F) B) and D)

Question 20

What type of AC waveform features voltage rising at a constant rate with respect to time?

Accepted Answer

A)   cosine
B)   linear
C)   sine
D)   pulsatingE) A) and B)
F) A) and C)

Exam 16: Alternating Current

What is the unit of measure for the power delivered to the load in a DC circuit?

Correct AnswerverifiedShow Answer

The number of cycles completed in one second is called a _____.

Correct AnswerverifiedShow Answer

The amplitude of a waveform is measured from _____.

Correct AnswerverifiedB

Frequency is measured in _____.

Correct AnswerverifiedShow Answer

What is the peak voltage of a 277 V RMS AC voltage?

Correct AnswerverifiedShow Answer

Square waves are generally produced by electronic devices called _____.

Correct AnswerverifiedShow Answer

When AC voltage is rectified and converted into DC, the resulting waveform is normally not pure, flat DC. The pulses that occur are called _____.

Correct AnswerverifiedShow Answer

A term used to indicate the same value as the RMS value is the _____ value.

Correct AnswerverifiedShow Answer

Each complete waveform of 360 ° is called a _____.

Correct AnswerverifiedShow Answer

In a DC circuit, the product of volts times the amperes is called the _____ power.

Correct AnswerverifiedC

If an AC waveform is rectified and converted into DC, the voltage value that results is the _____ value.

Correct AnswerverifiedShow Answer

What type of load contains pure resistance?

Correct AnswerverifiedShow Answer

The square root of the mean of the square of the instantaneous currents is known as the _____.

Correct AnswerverifiedShow Answer

Both AC and DC can be transformed.

Correct AnswerverifiedShow Answer

What is the RMS value of an AC voltage that has a 480 V peak?

Correct AnswerverifiedShow Answer

What is the most common of all AC waveforms?

Correct AnswerverifiedB

To help overcome the problem of skin effect in high-frequency circuits, conductors with a large amount of _______________ must be used.

Correct AnswerverifiedShow Answer

Rotating machines normally produce a waveform called a _____ wave.

Correct AnswerverifiedShow Answer

When current rises and falls at the same rate as the voltage and reverses the direction of flow when the voltage reverses polarity, the current is said to be _____ with the voltage.

Correct AnswerverifiedShow Answer

What type of AC waveform features voltage rising at a constant rate with respect to time?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
B

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
C

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
B

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified