Pole Objective Type Questions and answers

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

   A. 25 to 30 years

   B. 20 to 25 years

   C. 10 to 15 years

   D. 5 to 10 years

47.  Steel poles for transmission lines need protection against

   A. Borer

   B. Termites

   C. Corrosion

   D. All of the above

48.  RCC poles usually have the spans of

   A.250 to 400 m

   B.80 to 150 m

   C. 50 to 80 m

   D. 25 to 50 m

49.  The supports used for transmission lines should have the characteristics of

   A. High mechanical strength and longer life

   B. Good looking, line in weight and easily accessible for painting

   C.Cheap in initial as well in maintenance cost

   D. All of the above

50.  The ground wire should not be smaller than No.......copper

   A. 2

   B. 4

   C. 6

   D. 10

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