electrical

Switchgear and Protection MCQ Objective Questions and Answers Page - 9

1.

The use of high speed circuit breakers

Answer/ Hint      

Answer : B

Explanation :

2.

Transient state stability is generally improved by

Answer/ Hint      

Answer : A

Explanation :

3.

Load flow study is carried out for

Answer/ Hint      

Answer : B

Explanation :

4.

Load flow studies must be made on a power system before

Answer/ Hint      

Answer : C

Explanation :

5.

Load flow studies involve solving simultaneous

Answer/ Hint      

Answer : B

Explanation :

6.

In load flow studies of a power system, a voltage control bus is specified by  :

Answer/ Hint      

Answer : D

Explanation :

7.

For a load-flow solution the quantities normally specified at a voltage controlled bus are

Answer/ Hint      

Answer : B

Explanation :

8.

At slacks bus, which one of the following combinations of variables is specified  ?

Answer/ Hint      

Answer : A

Explanation :

9.

In a power system, the maximum number of buses are

Answer/ Hint      

Answer : B

Explanation :

10.

If a voltage controlled bus  is treated as a load bus, then which one of the following limits would be violated  ?

Answer/ Hint      

Answer : A

Explanation :

11.

In load-flow analysis, the load connected at a bus is represented as

Answer/ Hint      

Answer : D

Explanation :

12.

The voltage of a particular bus can be controlled by controlling

Answer/ Hint      

Answer : B

Explanation :

13.

Gauss-Seidel interactive method can be used for solving a set of

Answer/ Hint      

Answer : B

Explanation :

14.

Fault calculation using computer program are usually done by

Answer/ Hint      

Answer : A

Explanation :

15.

The Gauss Siedel load flow method has following disadvantages. Tick the incorrect statement

Answer/ Hint      

Answer : A

Explanation :

16.

In Gauss-Seidal load flow method, the number of iterations may be reduced if the correction in voltage at each bus is multiplied by

Answer/ Hint      

Answer : B

Explanation :

17.

Compared to Gauss Siedel method, Newton-Raphson method takes

Answer/ Hint      

Answer : A

Explanation :

18.

Regulating transformers are used in power system for control of

Answer/ Hint      

Answer : C

Explanation :

19.

In a load-flow study a PV bus is treated as a  PQ  bus when

Answer/ Hint      

Answer : D

Explanation :

20.

If the reference bus is changed in two load flow buses with same system data and power obtained for reference bus taken as specified  P  and  Q  in the latter run

Answer/ Hint      

Answer : A

Explanation :

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Switchgear and Protection MCQ Objective Questions and Answers Page - 9