Transformer Multiple Choice Questions and Answers

16. Spacers are provided between adjacent coils.......

   A.To provide free passege to the cooling oil

   B.To insulate the coils from each other

   C.Both (a) and (b)

   D.None of the above

17. Efficiency of a power transformer is of the order of........

   A.100%

   B.98%

   C.50%

   D.25%

18. Power transformers are degined to have maximum efficiency at........

   A.Nearly full loadα

   B.70% full loadα

   C.50% full loadα

   D.no-loadα

19. Transformer breaths in when........

   A.Load on it increases

   B.Load on it decreases

   C.Load remain constant

   D.None of the above

20. The power transformer is a constant........

   A.Voltage device

   A.Current device

   C.Power device

   D.Main flux device

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