Electrical Engineering Mcqs — Test 7

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Question 1

An open-circuit test on a transformer is conducted primarily to measure______________?

Question 2

A no-load test is performed on a transformer to determine_______________?

Question 3

The voltage transformation ratio of a transformer is equal to the ratio of_______________?

Question 4

Part of the transformer which is most subject to damage from overheating is_____________?

Question 5

If a transformer is switched on to a voltage more than the rated voltage______________?

Question 6

Auto-transformer makes effective saving on copper and copper losses, when its transformation ratio is_________________?

Question 7

Minimum voltage regulation occurs when the power factor of the load is_____________?

Question 8

The efficiencies of transformers compared with that of electric motors of the same power are____________?

Question 9

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

Question 10

The secondary of a current transformer is always short-circuited under operating conditions because it____________________?