MCQ on Single Phase Transformer - Electrical Engineering
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Transformer MCQ Questions and Answers for the best preparation for the Transformer & Electrical Engineering Exams and interviews.
- 0.5 kW
- 0.2 kW
- 0.25 kW
- 0.1 kW
Question 1: A transformer is working at its full load and its efficiency is also maximum. Its iron loss is 1 kW, its copper loss at half load will be?
Answers: 0.25 kW
- 40 ?
- 60 ?
- 20 ?
- 10 ?
Question 2: A transformer having a turn ratio 1: 5 and a resistance of 1000 ? is connected across the secondary terminals, the resistance offered to a current flowing in the primary will be?
Answers: 40 ?
- less than weight of copper
- greater than weight of copper
- zero
- equal to the weight of copper
Question 3: For minimum weight of a transformer, the weight of iron should be?
Answers: equal to the weight of copper
- magnetising current
- efficiency
- copper loss
- core loss
Question 4: A no-load test is performed on a transformer to determine?
Answers: efficiency
- Low voltage winding
- Secondary winding
- High voltage winding
- Primary winding
Question 5: Which winding of the transformer has less cross-sectional area?
Answers: High voltage winding
- none of the above
- either of the above
- not be short-circuited
- not be open-circuited
Question 6: The secondary winding of a current transformer whose primary is carrying current should?
Answers: not be open-circuited
- area of the core
- (a) and (d) both
- flux density of the core material
- frequency
Question 7: The size of a transformer core will depend on?
Answers: (a) and (d) both
- zero
- 1000 ?
- infinity
- 10?
Question 8: In a transformer the resistance between its primary and secondary should be ?
Answers: infinity
- the secondary induced EMF
- the drop across resistances and reactance
- the secondary voltage
- the primary induced EMF
Question 9: In an ideal transformer, on no-load, the primary voltage is balanced by ?
Answers: the secondary induced EMF
- cross-sectional area of the iron core
- ohmic resistance of primary winding
- ohmic resistance of secondary winding
- magnitude of leakage flux
Question 10: The short-circuit voltage of a transformer mainly depends on the?
Answers: magnitude of leakage flux
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Total Questions Attempted: 0
Correct: 0 Wrong: 0
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