Electrical engineering: Electrical Machine MCQs - Page 13 of 17

What would happen if a transformer is connected to a DC supply?

No effect
Operate with high efficiency
damage the tgransformer
Operate with low efficiency

Answer

In a transformer the primary flux is _______ secondary flux.

greater than
smaller than
either 1 and 2
equal to

Answer

Which of the following loss in a transformer is zero even at full load

eddy current loss
Copper loss
core loss
friction loss

Answer

In a transformer the resistance between its primary and secondary is

zero
infinite
1000 ohm
100 ohm

Answer

The efficiency of two identical transformers under load conditions can be determined by

Short Circuit test
Open Circuit test
no load test
back to back test

Answer

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Electrical Machine MCQs