electrical

Transmission and Distribution MCQ Objective Questions and Answers Page - 8

1.

High voltage dc transmission requires filters for

Answer/ Hint      

Answer : B

Explanation :

2.

In a 3-phase bridge rectifier circuit for  HVDC  transmission, the ratio of output dc voltage to input ac voltage is

Answer/ Hint      

Answer : D

Explanation :

3.

In HVDC converter station equipment using thyristors it is necessary to use a large number of thyristors in series because

Answer/ Hint      

Answer : B

Explanation :

4.

In the HVDC  system, the ac harmonics which gets effectively eliminated with 12 pulse bridge converters, are

Answer/ Hint      

Answer : D

Explanation :

5.

By which of the following method string efficiency can be improved?

Answer/ Hint      

Answer : D

Explanation :

6.

In aluminium conductors, steel core is provided to

Answer/ Hint      

Answer : D

Explanation :

7.

By which of the following a bus-bar is rated?

Answer/ Hint      

Answer : D

Explanation :

8.

A circuit is disconnected by isolators when

Answer/ Hint      

Answer : B

Explanation :

9.

For which of the following equipment current rating is not necessary?

Answer/ Hint      

Answer : B

Explanation :

10.

In a substation the following equipment is not installed

Answer/ Hint      

Answer : A

Explanation :

11.

Corona usually occurs when the electrostatic stress in air around the conductor exceeds

Answer/ Hint      

Answer : D

Explanation :

12.

The voltage drop, for constant voltage transmission is compensated by installing

Answer/ Hint      

Answer : C

Explanation :

13.

The use of strain type insulators is made where the conductors are

Answer/ Hint      

Answer : C

Explanation :

14.

The current drawn by the line due to corona losses is

Answer/ Hint      

Answer : A

Explanation :

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Transmission and Distribution MCQ Objective Questions and Answers Page - 8