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


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A.To provide free passege to the cooling oil

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

   A.100%

   B.98%

   C.50%

   D.25%


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B.98%

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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


✔ View Answer


A.Nearly full loadα

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

   A.Load on it increases

   B.Load on it decreases

   C.Load remain constant

   D.None of the above


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B.Load on it decreases

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

   A.Voltage device

   A.Current device

   C.Power device

   D.Main flux device


✔ View Answer


D.Main flux device

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