Insulator | Transmission And Distribution Objective Type Questions and answers

26.  Which type of insulators are used on 132KV transmission lines?

   A.Pin type

   B. Disc type

   C. Shackle type

   D. Pin and shackle type

27.  Whenever the conductors are dead-ended or there is a change in the direction of transmission line, the insulators used are of the

   A. Pin type

   B. Suspension type

   C. Strain type

   D. Shackle type

28.  The insulators may fail due to

   A. Flash over

   B. Short circuits

   C.Deposition of dust

   D. Any of the above

29.  The ratio of puncture voltage to the flashover voltage of a line insulator is

   A. Equal to 1

   B. Lower than 1

   C. Much greater than 1

   D. None of the above

30.  In a suspension type insulator the potential drop is

   A. Maximum across the lowest disc

   B. Maximum across the topmost disc

   C. Uniformly distributed over the disc

   D. None of the above

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