Transmission and distribution Archives - Page 4 of 10 - MCQ and Quiz for Exams

31. The material commonly used for sheaths of underground cables is

Lead

Rubber

Copper

Iron

Detailed SolutionThe material commonly used for sheaths of underground cables is

32. By which of the following systems electric power may be transmitted?

Overhead system

Underground system

Both (A) and (B)

None of the above

Detailed SolutionBy which of the following systems electric power may be transmitted?

33. The wooden poles well impregnated with creosite oil or any preservative compound have life

from 2 to 5 years

10 to 15 years

25 to 30 years

60 to 70 years

Detailed SolutionThe wooden poles well impregnated with creosite oil or any preservative compound have life

34. For transmission of power over a distance of 200 km, the transmission voltage should be

132 kV

66 kV

33 kV

11 kV

Detailed SolutionFor transmission of power over a distance of 200 km, the transmission voltage should be

35. Which of the following distribution systems is more reliable?

Radial system

Tree system

Ring main system

All are equally reliable

Detailed SolutionWhich of the following distribution systems is more reliable?

36. The conductors of the overhead lines are

solid

stranded

both solid and stranded

none of the above

Detailed SolutionThe conductors of the overhead lines are

37. In a tap changing transformer, the tappings are provided on

Primary winding

Secondary winding

High voltage winding

Any of the above

Detailed SolutionIn a tap changing transformer, the tappings are provided on

38. A conductor, due to sag between two supports, takes the form of

Semicircle

Triangle

Ellipse

Catenary

Detailed SolutionA conductor, due to sag between two supports, takes the form of

39. Which of the following regulations is considered best?

50%

20%

10%

2%

Detailed SolutionWhich of the following regulations is considered best?

40. Which of the following is the source of heat generation in the cables?

Dielectric losses in cable insulation

losses in the conductor

Losses in the metallic sheathings and armourings

All of the above

Detailed SolutionWhich of the following is the source of heat generation in the cables?

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