Electrical Technical Interviews - Electrical Engineering
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Transformers MCQ is available for Electrical Engineering students to clear Gate exams and Technical Interviews.
- on zero power factor
- on overload
- on leading power factor
- on full-load
Question 1: A transformer can have Regulation closer to zero?
Answers: on leading power factor
- copper losses
- hysteresis losses
- core losses
- eddy current losses
Question 2: Short circuit test on transformers is conducted to determine?
Answers: copper losses
- buzz
- zoom
- ringing
- Hum
Question 3: The noise produced by a transformer is termed as ?
Answers: Hum
- Overload
- Core saturation
- Loose connections
- Poor-insulation
Question 4: Which of the following is the most likely source of harmonics in a transformer?
Answers: Core saturation
- resistive
- inductive
- capacitive
- none of the above
Question 5: The type of load for which the voltage regulation of a transformer is negative is?
Answers: capacitive
- none of the above
- load is balanced only
- load is unbalanced only
- on balanced as well as unbalanced loads
Question 6: Delta/star transformer works satisfactorily when?
Answers: on balanced as well as unbalanced loads
- Winding material of high resistivity
- Low reluctance magnetic core
- Transformer oil of high breakdown voltage
- High reluctance magnetic core
Question 7: Which of the following will improve the mutual coupling between primary and secondary circuits?
Answers: Low reluctance magnetic core
- has small magnitude and high power factor
- has high magnitude and high power factor
- has small magnitude and low power factor
- has high magnitude and low power factor
Question 8: No-load current of a transformer has?
Answers: has small magnitude and low power factor
- all of the above
- mechanical stress
- temperature rise
- insulation life
Question 9: In a transformer over currents affect?
Answers: all of the above
- Cast steel
- Cast iron
- Hot rolled grain oriented steel
- Cold rolled grain oriented steel
Question 10: Which of the following materials is suitable for the manufacture of transformer and large turbo-alternator?
Answers: Cold rolled grain oriented steel
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Total Questions Attempted: 0
Correct: 0 Wrong: 0
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