electrical

Transmission and Distribution MCQ Objective Questions and Answers Page - 1

1.

Transmission line connects

Answer/ Hint      

Answer : A

Explanation :

2.

A 3-phase 4-wire system is commonly used for

Answer/ Hint      

Answer : B

Explanation :

3.

The rated voltage of a 3-phase power is given as

Answer/ Hint      

Answer : C

Explanation :

4.

Which of the following is usually not the generating voltage  ?

Answer/ Hint      

Answer : B

Explanation :

5.

In a Transmission system the feeder supplies power to

Answer/ Hint      

Answer : C

Explanation :

6.

Feeder is designed mainly from the point of view of

Answer/ Hint      

Answer : A

Explanation :

7.

Distributors are designed from the point of view of

Answer/ Hint      

Answer : C

Explanation :

8.

Transmission and Distribution of electric power by underground system is superior to overhead system in respect of

Answer/ Hint      

Answer : D

Explanation :

9.

The main drawback(s) of underground system over overhead system  is/are

Answer/ Hint      

Answer : B

Explanation :

10.

The main drawback(s) of overhead system over underground system  is/are

Answer/ Hint      

Answer : C

Explanation :

11.

By increasing the Transmission voltage double of its original value, the same power can be despatched keeping the line loss

Answer/ Hint      

Answer : D

Explanation :

12.

For the same voltage drop increasing the voltage of a distributor  n-times

Answer/ Hint      

Answer : A

Explanation :

13.

In a Transmission system, the weight of copper used is proportional to

Answer/ Hint      

Answer : C

Explanation :

14.

The volume of copper required for an ac Transmission line is inversely proportional to

Answer/ Hint      

Answer : D

Explanation :

15.

For the same conductor length, same amount of power, same losses and same maximum voltage to earth, which system required minimum conductor area  ?

Answer/ Hint      

Answer : D

Explanation :

16.

Which of the following distribution system is preferred for good efficiency and high economy  ?

Answer/ Hint      

Answer : D

Explanation :

17.

The approximate cost ratio of a  220 kV , underground cable transmission and  220 kV O/H transmission is

Answer/ Hint      

Answer : C

Explanation :

18.

The main reason for using high voltage for long distance power transmission is

Answer/ Hint      

Answer : A

Explanation :

19.

66 kV is suitable for transmission of power over

Answer/ Hint      

Answer : B

Explanation :

20.

If  3 MW  power is to be transmitted over a distance of  30 km,  the desirable transmission voltage will be

Answer/ Hint      

Answer : B

Explanation :

21.

The highest transmission voltage used in India is

Answer/ Hint      

Answer : D

Explanation :

22.

If variable part of annual cost on account of interest and depreciation on the capital out lay is equal to the annual cost of electrical energy wasted in the conductors, the total annual cost will be minimum and the corresponding size of conductor will be the most economical. This statement is known as

Answer/ Hint      

Answer : B

Explanation :

23.

For high-voltage transmission lines, conductors are suspended from towers so as to

Answer/ Hint      

Answer : A

Explanation :

24.

The supports used for transmission lines should have the characteristic(s)  of

Answer/ Hint      

Answer : D

Explanation :

25.

The wooden poles well impregnated with creosote oil or any preservative compound have life of

Answer/ Hint      

Answer : A

Explanation :

26.

Steel poles for transmission lines need protection against

Answer/ Hint      

Answer : C

Explanation :

27.

RCC poles usually have the spans of

Answer/ Hint      

Answer : B

Explanation :

28.

In India for distribution of electric power we usually use

Answer/ Hint      

Answer : D

Explanation :

29.

Conductors used in  ht  transmission lines are stranded because of

Answer/ Hint      

Answer : B

Explanation :

30.

Which of the following properties has got higher value for aluminium in comparison to that of copper  ?

Answer/ Hint      

Answer : A

Explanation :

31.

In a  7/30  ACSR conductor why is grease put between steel and aluminium conductors  ?

Answer/ Hint      

Answer : A

Explanation :

32.

ACSR is used in place of copper in overhead lines because of

Answer/ Hint      

Answer : C

Explanation :

33.

ACSR conductors have

Answer/ Hint      

Answer : B

Explanation :

34.

The function of steel wire in an  ACSR  conductor is to

Answer/ Hint      

Answer : C

Explanation :

35.

The material used for the manufacture of ground wire is

Answer/ Hint      

Answer : B

Explanation :

36.

Guy wire is employed for

Answer/ Hint      

Answer : C

Explanation :

37.

The sag of a transmission line is least affected owing to

Answer/ Hint      

Answer : B

Explanation :

38.

Effect of temperature rise in overhead lines is to

Answer/ Hint      

Answer : A

Explanation :

39.

In a transmission line, sag depends upon

Answer/ Hint      

Answer : D

Explanation :

40.

Which of the following statements is correct  ?

Answer/ Hint      

Answer : C

Explanation :

Transmission and Distribution MCQ Objective Questions and Answers Page - 1
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