Transformer Multiple Choice Questions and Answers


11. A transformer core is laminated to.......

   A.Reduce hysteresis loss

   B.Reduce eddy current loss

   C.Reduce copper loss

   D.Reduce all above losses


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B.Reduce eddy current loss

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12. The no-load current drawn by transformer is usually........

   A.0.2% to 0.5%

   B.2% to 5%

   C.12% to 15%

   D.20% to 30%


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B.2% to 5%

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13. No-load on a transformer is carried out to determine........

   A.Copper lossα

   B.Magnetising currentα

   C.Magnetising current and lossα

   D.Efficiency of the transformerα


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C.Magnetising current and lossα

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14. Sumpner's test is conducted on transformers to determine........

   A.Temperature

   B.Stray loss

   C.All-day efficiency

   D.All of the above


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A.Temperature

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15. No-load current in a transformer........

   A.Lags behind the voltage by about 750

   A.Lags behind the voltage by about 150

   C.Leads the voltage by about 750

   D.Leads the voltage by about 150


✔ View Answer


A.Lags behind the voltage by about 750

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