MCQ TEST | Chapter 2: Power Frequency Disturbance (PQM) | Electrical Engineering Quiz | Important For Final year GTU Exam 2020

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Hello Dear GTU Students, Here we provide MCQ test For your upcoming Final Year Exam 2020. Today we provide test for Power Quality and Management Subject of Electrical Engineering Department. Today we cover MCQ for Chapter 2: Power Frequency Disturbance. This MCQ test is very useful for your upcoming final year exam.

Chapter 2: Power Frequency Disturbance (PQM) (Electrical Engineering)

______ is the short time reduction in the rms voltage between 0.1 to 0.9 p.u for a duration of 0.5 cycle to 1 minute.

A. Voltage sag
B. Voltage Interruption
C. Voltage degradation
D. Voltage surge

View Answer
Answer: Voltage sag
Explanation: A voltage sag is a short duration reduction in rms voltage which can be caused by a short circuit, overload, or starting of electric motors. A voltage sag happens when the rms voltage decreases between 10 and 90 percent of nominal voltage for one-half cycle to one minute.

______ is the RMS increase in AC Voltage for Several cycles after which voltage comes back to normal.

A. Sag
B. Swell
C. Voltage degradation
D. Surge

View Answer
Answer:Swell
Explanation:

Which are source of Voltage Sag?

A. Motors
B. Switching Operation
C. Abrupt Faults
D. All of above

View Answer
Answer:All of above
Explanation:

Voltage Sag cause which of the following:

A. Starting the Motors
B. Equipment Faults
C. Utility System
D. All of above

View Answer
Answer:All of above
Explanation:

A ferro resonant transformer is also known as ______.

A. Constant current transformer
B. Constant voltage transformer
C. Variable current transformer
D. Variable voltage transformer

View Answer
Answer:Constant voltage transformer
Explanation:

A ferro resonant transformer are __________.

A. It is sensitive to Frequency
B. It is not sensitive to temperature changes.
C. Not Suitable for the equipment which requires huge inrush current.
D. A and C are correct

View Answer
Answer:A and C are correct
Explanation:

Static Var Compensators (SVC) are used for _______

A. Voltage regulation
B. Reactive power control
C. Recovering stability of the device
D. all of the above

View Answer
Answer:all of the above
Explanation:

Voltage regulators keep a constant __ output voltage when the input or load varies within limits.

A. dc
B. ac
C. ripple

View Answer
Answer:dc
Explanation: