Transformer Multiple Choice Questions and Answers


1. Transformer cores are laminated in order to.......

   A.Minimise eddy current loss

   B.Reduce cost

   C.Simplify its construction

   D.Reduce hysteresis loss


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A.Minimise eddy current loss

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2. A step-up transformer increases........

   A.Voltage

   B.Current

   C.Power

   D.Frequency


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A.Voltage

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3. A transformer transform........

   A.Voltageα

   B.Currentα

   C.Frequencyα

   D.Voltage and currentα


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D.Voltage and currentα

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4. A transformer has negative voltage regulation when its load power factor is........

   A.Zero

   B.Unity

   C.Leading

   D.Lagging


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C.Leading

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5. The main purpose of performing open-circuit test on a transformer is to measure its........

   A.Cu loss

   A.Core loss

   C.Total loss

   D.Insulation resistance


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B.Core loss

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