Insulator | Transmission And Distribution Objective Type Questions and answers

31.  Which of the following is not a constituent for making porcelain insulators?

   A.Quartz

   B. Kaolin

   C.Felspar

   D.Silica

32.  Pin type insulators are generally not used for voltages beyond

   A. 1 KV

   B.11 KV

   C. 22 KV

   D.33 KV

33.  Strain type insulators are used

   A. At dead ends

   B. At intermediate anchor towers

   C. On straight runs

   D. Any of A or B

34.  Wavy structure of pin insulator increases its

   A. Mechanical strength

   B. Puncture strength

   C. Flash over voltage

   D. Thermal strength

35.  The number of discs in a string insulators for 400 KV ac overhead transmission line lies in the range of

   A. 32 to 33

   B. 22 to 23

   C. 15 to 16

   D. 9 to 10

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