Substation equipment and busbar system - Electrical Engineering (MCQ) questions and answers

1)   Which among these uses a low voltage DC source?

a. Remote indication
b. Emergency lighting system
c. Remote position control
d. All of these
e. None of these
Answer  Explanation 

ANSWER: All of these

Explanation:
No explanation is available for this question!
2)   Which sequence is followed first while closing a circuit breaker?

a. Close the isolator
b. Open earthing switch
c. Close circuit breaker
d. Any of these
Answer  Explanation 

ANSWER: Open earthing switch

Explanation:
No explanation is available for this question!
3)   Which equipment is used for EHV lines to improve power transferability?

a. Shunt capacitor
b. Shunt reactor
c. Series capacitor
d. All of these
Answer  Explanation 

ANSWER: Series capacitor

Explanation:
No explanation is available for this question!
4)   Which among these is a configuration of an isolator?

i. Vertical break type
ii. Horizontal type
iii. Horizontal break with two post insulator
iv. Horizontal break centre post rotating double break
v. Pantograph type


a. Only ii and iii
b. i, ii, iii, and iv
c. i, ii, iii, iv, v
d. i, ii, iv, v
Answer  Explanation 

ANSWER: i, ii, iii, iv, v

Explanation:
No explanation is available for this question!
5)   Which among these is a type of surge arrestor?

a. Conventional gapped arrestors
b. Metal oxide arrestors
c. Both (A) and (B)
d. None of these
Answer  Explanation 

ANSWER: Both (A) and (B)

Explanation:
No explanation is available for this question!
6)   Which among these types of bus bars can be used outdoor?

a. Tubular
b. ACSR
c. AAC
d. All of these
e. None of these
Answer  Explanation 

ANSWER: All of these

Explanation:
No explanation is available for this question!
7)   Which material is used for indoor bus bar?

a. Copper
b. Aluminium
c. Silver
d. Both (A) and (B)
Answer  Explanation 

ANSWER: Copper

Explanation:
No explanation is available for this question!
8)   At what pressure is the SF6 gas filled in the whole installation of GIS substations?

a. 3 kg / cm2
b. 5 kg / cm2
c. 3 kg / m2
d. 5 kg / m2
Answer  Explanation 

ANSWER: 3 kg / cm2

Explanation:
No explanation is available for this question!
9)   What is the range of MHV substations?

a. All voltages above 1000 V AC
b. Voltages between 1kV and 33 kV
c. Between 33 kV and 110 kV
d. 220 kV and 400 kV
Answer  Explanation 

ANSWER: Voltages between 1kV and 33 kV

Explanation:
No explanation is available for this question!
10)   What is / are the types of substations suitable for voltage 66 kV and above?

a. Conventional outdoor
b. SF^ gas insulated metal enclosed substation
c. Hybrid substation
d. Only b and c
e. All of these
Answer  Explanation 

ANSWER: All of these

Explanation:
No explanation is available for this question!

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