Lead
Rubber
Copper
Iron
Answer is Right!
Answer is Wrong!
Detailed SolutionThe material commonly used for sheaths of underground cables is
Transmission and distribution
32. By which of the following systems electric power may be transmitted?
Overhead system
Underground system
Both (A) and (B)
None of the above
Answer is Right!
Answer is Wrong!
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
Answer is Right!
Answer is Wrong!
34. For transmission of power over a distance of 200 km, the transmission voltage should be
132 kV
66 kV
33 kV
11 kV
Answer is Right!
Answer is Wrong!
35. Which of the following distribution systems is more reliable?
Radial system
Tree system
Ring main system
All are equally reliable
Answer is Right!
Answer is Wrong!
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
Answer is Right!
Answer is Wrong!
37. In a tap changing transformer, the tappings are provided on
Primary winding
Secondary winding
High voltage winding
Any of the above
Answer is Right!
Answer is Wrong!
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
Answer is Right!
Answer is Wrong!
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%
Answer is Right!
Answer is Wrong!
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
Answer is Right!
Answer is Wrong!
Detailed SolutionWhich of the following is the source of heat generation in the cables?