Transformers MCQ Questions Answers Electrical Engineering

11) The power efficiency of a lighting transformer is always……..its all-day efficiency.

a) equal to

b) higher than

c) less than

d) none of the above

View Answer
Option – b)

12) What is the approximate efficiency of large transformers?

a) 65%

b) 75%

c) 85%

d) 95%

View Answer
Option – d)

13) The inductive reactance of a transformer depends on

a) e.m.f.

b) m.m.f.

c) leakage flux

d) magnetic flux

View Answer
Option – c)

14) How are transformers generally cooled for installations rated at less than 5 kVA?

a) oil cooled

b) air cooled

c) water cooled

d) none of the above

View Answer
Option – b)

15) The transformer that does not provide electric isolation is

a) power transformer

b) autotransformer

c) current transformer

d) potential transformer

View Answer
Option – b)

Best Wishes for the All Candidates!!

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