[amp_mcq option1=”Lead” option2=”Rubber” option3=”Copper” option4=”Iron” correct=”option1″]
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?
[amp_mcq option1=”Overhead system” option2=”Underground system” option3=”Both (A) and (B)” option4=”None of the above” correct=”option3″]
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
[amp_mcq option1=”from 2 to 5 years” option2=”10 to 15 years” option3=”25 to 30 years” option4=”60 to 70 years” correct=”option3″]
34. For transmission of power over a distance of 200 km, the transmission voltage should be
[amp_mcq option1=”132 kV” option2=”66 kV” option3=”33 kV” option4=”11 kV” correct=”option1″]
35. Which of the following distribution systems is more reliable?
[amp_mcq option1=”Radial system” option2=”Tree system” option3=”Ring main system” option4=”All are equally reliable” correct=”option3″]
Detailed SolutionWhich of the following distribution systems is more reliable?
36. The conductors of the overhead lines are
[amp_mcq option1=”solid” option2=”stranded” option3=”both solid and stranded” option4=”none of the above” correct=”option2″]
37. In a tap changing transformer, the tappings are provided on
[amp_mcq option1=”Primary winding” option2=”Secondary winding” option3=”High voltage winding” option4=”Any of the above” correct=”option1″]
Detailed SolutionIn a tap changing transformer, the tappings are provided on
38. A conductor, due to sag between two supports, takes the form of
[amp_mcq option1=”Semicircle” option2=”Triangle” option3=”Ellipse” option4=”Catenary” correct=”option4″]
Detailed SolutionA conductor, due to sag between two supports, takes the form of
39. Which of the following regulations is considered best?
[amp_mcq option1=”50%” option2=”20%” option3=”10%” option4=”2%” correct=”option4″]
Detailed SolutionWhich of the following regulations is considered best?
40. Which of the following is the source of heat generation in the cables?
[amp_mcq option1=”Dielectric losses in cable insulation” option2=”losses in the conductor” option3=”Losses in the metallic sheathings and armourings” option4=”All of the above” correct=”option4″]
Detailed SolutionWhich of the following is the source of heat generation in the cables?