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Power Factor & Harmonics MCQ Questions & Answers

Power Factor & Harmonics MCQs : This section focuses on the "Power Factor & Harmonics". These Multiple Choice Questions (MCQs) should be practiced to improve the Power Factor & Harmonics skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.




Question 1

Calculate the active power in 14 ?H inductors if the THD value is 58.1%.

A. 5 W
B. 9 W
C. 4 W
D. 0 W

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Question 2

Calculate the active power in 56 ?F capacitor if the VRF value is 5.1%.

A. 6 W
B. 0 W
C. 9 W
D. 2 W

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Question 3

Calculate the apparent power using the data: P=3 W, Q=4 VAR.

A. 5 VA
B. 6 VA
C. 9 VA
D. 2 VA

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Question 4

Calculate the power factor using the data: P=15 W, S=25 VA.

A. 0.5
B. 0.9
C. 0.4
D. 0.6

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Question 5

Calculate the value of impedance using the data: R=2 ?, XL=4 ?.

A. 5.5 ?
B. 5.4 ?
C. 2.5 ?
D. 4.4 ?

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Question 6

Full form of STATCOM is ___________

A. Static Synchronous Counter
B. Static Synchronous Compensator
C. State Synchronized Compensator
D. State System Counter

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Question 7

Full form of SVC is ___________

A. Static Var Compensator
B. Static Variable Counter
C. State Value Counter
D. Static Value Compensator

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Question 8

If induction motor air gap power is 11 KW and mechanically developed power is 2 KW, then rotor ohmic loss will be _________ KW.

A. 8
B. 10
C. 9
D. 11

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Question 9

If induction motor rotor power is 26 KW and gross developed power is 21 KW, then rotor ohmic loss will be _________ KW.

A. 5
B. 6
C. 7
D. 8

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Question 10

Skin effect increases at higher frequencies.

A. True
B. False

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Question 11

SVC is used to maintain the power factor above __________

A. 0.2
B. 0.5
C. 0.8
D. 0.6

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Question 12

The circuit which operates signals is called as ___________

A. Track circuit
B. Fellow circuit
C. Ground circuit
D. Unit circuit

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Question 13

Which is the most severe type of fault?

A. LL
B. LLG
C. LLL
D. LLLG

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Question 14

Which type of grounding is used to suppress the capacitive effect?

A. Solid grounding
B. Reactance grounding
C. Resistance grounding
D. Peterson coil

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Question 15

Calculate the active power in 14 μH inductors if the THD value is 58.1%.

A. 5 W
B. 9 W
C. 4 W
D. 0 W

View Answer

Question 16

Calculate the active power in 56 μF capacitor if the VRF value is 5.1%.

A. 6 W
B. 0 W
C. 9 W
D. 2 W

View Answer

Question 17

Calculate the value of impedance using the data: R=2 Ω, XL=4 Ω.

A. 5.5 Ω
B. 5.4 Ω
C. 2.5 Ω
D. 4.4 Ω

View Answer