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

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

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

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

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 ?

Question 6

Full form of STATCOM is ___________

A. Static Synchronous Counter

B. Static Synchronous Compensator

C. State Synchronized Compensator

D. State System Counter

Question 7

Full form of SVC is ___________

A. Static Var Compensator

B. Static Variable Counter

C. State Value Counter

D. Static Value Compensator

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

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

Question 10

Skin effect increases at higher frequencies.

A. True

B. False

Question 11

SVC is used to maintain the power factor above __________

A. 0.2

B. 0.5

C. 0.8

D. 0.6

Question 12

The circuit which operates signals is called as ___________

A. Track circuit

B. Fellow circuit

C. Ground circuit

D. Unit circuit

Question 13

Which is the most severe type of fault?

A. LL

B. LLG

C. LLL

D. LLLG

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

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

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

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