Transformers – Page 6 – HI MCQ!

In order to find the full-load efficiency of a transformer the losses which must be known?

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While rising and while falling, if a wave is symmetrical, it contains?

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Dust should never be allowed to accumulate on the windings and core of a dry. type transformer because it?

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For parallel operation of two single phase transformers the essential condition is that they should have the same?

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ln a step-down transformer, there is a change of 15 A in the load current. This results in change of supply current of?

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In a power or distribution transformer about 10 per cent end turns are heavily insulated?

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Part of the transformer which is most subject to damage from over heating is?

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Which type of winding is used in 3-phase shell-type transformer?

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Harmonic currents in a transformer cause?

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Which of the following test on a transformer provides information about regulation, efficiency and heating under load conditions?

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