electrical

Transmission and Distribution MCQ Objective Questions and Answers Page - 5

1.

To increase the transmission capability of a high voltage long line

Answer/ Hint      

Answer : C

Explanation :

2.

Power despatch through a line can be increased by

Answer/ Hint      

Answer : A

Explanation :

3.

The power transmitted will be maximum when

Answer/ Hint      

Answer : D

Explanation :

4.

For constant voltage transmission, the voltage drop along the line is maintained constant by installing

Answer/ Hint      

Answer : D

Explanation :

5.

Constant voltage transmission have the drawback(s) of

Answer/ Hint      

Answer : D

Explanation :

6.

Constant voltage transmission have the advantage(s) of

Answer/ Hint      

Answer : D

Explanation :

7.

Constant voltage transmission have the advantage(s) of

Answer/ Hint      

Answer : C

Explanation :

8.

When the sending end voltage and current are numerically equal to the receiving end voltage and current respectively, then the line is called

Answer/ Hint      

Answer : A

Explanation :

9.

A synchronous conductor is a

Answer/ Hint      

Answer : C

Explanation :

10.

A synchronous compensator absorbs inductive reactive power. It is

Answer/ Hint      

Answer : C

Explanation :

11.

A synchronous phase modifier as compared to synchronous motor of the same rating has

Answer/ Hint      

Answer : B

Explanation :

12.

Phase modifier is normally installed in case of

Answer/ Hint      

Answer : C

Explanation :

13.

Which of the following statements is not true  ?

Answer/ Hint      

Answer : A

Explanation :

14.

Capacitors are used in power system to

Answer/ Hint      

Answer : B

Explanation :

15.

Series capacitors on transmission lines are of little use when

Answer/ Hint      

Answer : A

Explanation :

16.

For a fixed value of complex power flow in a transmission line having a sending end voltage  V, the real power loss loss will be proportional to

Answer/ Hint      

Answer : C

Explanation :

17.

For a fixed receiving-end and sending-end voltages in a transmission system, what is the locus of the constant power  ?

Answer/ Hint      

Answer : D

Explanation :

18.

Conduit pipe is generally employed for protection of

Answer/ Hint      

Answer : A

Explanation :

19.

Sheaths are used in cables to

Answer/ Hint      

Answer : C

Explanation :

20.

The bedding  on a cable consists of

Answer/ Hint      

Answer : D

Explanation :

21.

The material(s) used for armouring of an underground cable  is/are

Answer/ Hint      

Answer : D

Explanation :

22.

Metallic shielding is provided on underground cable to

Answer/ Hint      

Answer : D

Explanation :

23.

Metallic shielding provided on cables is usually of thickness.

Answer/ Hint      

Answer : B

Explanation :

24.

The effect of bonding the cable is

Answer/ Hint      

Answer : B

Explanation :

25.

The thickness of insulation layer provided on the conductor, in cables, depends upon

Answer/ Hint      

Answer : A

Explanation :

26.

The undesirable property of an electrical insulating material is

Answer/ Hint      

Answer : B

Explanation :

27.

Empire tape is

Answer/ Hint      

Answer : A

Explanation :

28.

Paper as an insulating material has the main drawback that it

Answer/ Hint      

Answer : A

Explanation :

29.

In paper insulated cables, the conductor x-section is usually limited to

Answer/ Hint      

Answer : C

Explanation :

30.

The dielectric strength of impregnated paper is about

Answer/ Hint      

Answer : A

Explanation :

31.

Paper used as an insulating material is usually treated with oily compound because it

Answer/ Hint      

Answer : B

Explanation :

32.

Single-core cables are usually not provided with armouring in order to

Answer/ Hint      

Answer : A

Explanation :

33.

Multi-core cables generally use

Answer/ Hint      

Answer : D

Explanation :

34.

SL type cables, over H-type cables, have the advantage(s) of

Answer/ Hint      

Answer : D

Explanation :

35.

Screened type cables, over belted cables, have the advantage(s) of

Answer/ Hint      

Answer : D

Explanation :

36.

Solid type cables are not considered suitable for operating voltages exceeding  66 kV  because

Answer/ Hint      

Answer : B

Explanation :

37.

In a 3-core extra high voltage cable, a metallic screen around each core insulation is provided to

Answer/ Hint      

Answer : C

Explanation :

38.

Oil-filled cables have the advantage(s) of

Answer/ Hint      

Answer : D

Explanation :

39.

Oil-filled cables have the advantage(s) of

Answer/ Hint      

Answer : D

Explanation :

40.

Oil-filled cables have the drawback(s) of

Answer/ Hint      

Answer : B

Explanation :

41.

Transmission line insulators are made of

Answer/ Hint      

Answer : B

Explanation :

42.

The material commonly used for sheaths of underground cables is

Answer/ Hint      

Answer : A

Explanation :

43.

The minimum clearance between the ground and a 220kV line is about

Answer/ Hint      

Answer : C

Explanation :

44.

The spacing between phase conductors of a 220kV line is approximately equal to

Answer/ Hint      

Answer : C

Explanation :

45.

Large industrial consumers are supplied electrical energy

Answer/ Hint      

Answer : C

Explanation :

46.

In a D.C 3-wire distribution system, balancer field are cross-connected in order to

Answer/ Hint      

Answer : D

Explanation :

47.

In a D.C 3-wire distributor using balancer and having unequal loads on the two sides

Answer/ Hint      

Answer : C

Explanation :

48.

Transmitted power remaining the same, if supply voltage of a D.C 2-wire feeder is increased 100 percent, saving copper is

Answer/ Hint      

Answer : B

Explanation :

49.

A uniformly-loaded D.C distributor is fed at both ends with equal voltages. As compared to a similar distributor fed at one end only, the drop at the middle point is

Answer/ Hint      

Answer : A

Explanation :

50.

As compared to 2-wire D.C distributor, a 3-wire distributor with same maximum voltage to earth uses only

Answer/ Hint      

Answer : A

Explanation :

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