Practice MCQ Questions and answers on Transformers Mcqs

A. Its secondary current is 5 A

B. Its secondary voltage is 400 V

C. Its rating is 2 kVA

D. Its secondary current is 20 A

E. It is a step-up transformer

A. hysteresis and eddy current losses

B. friction and windage losses

C. copper losses

D. none of the above

A. friction and windage losses

B. magnetic losses

C. hysteresis and eddy current losses

D. copper losses

A. eddy current loss will decrease

B. eddy current loss will increase

C. eddy current loss will remain unchanged

D. none of the above

A. to withstand the high voltage drop due to line surge produced by the shunting capacitance of the end turns

B. to absorb the line surge voltage and save the winding of transformer from damage

C. to reflect the line surge and save the winding of a transformer from damage

D. none of the above

A. core built-up of laminations of cold rolled grain oriented steel

B. core built-up of laminations of hot rolled sheet

C. either of the above

D. none of the above

A. zoom

B. hum

C. ringing

D. buzz

A. Bushings

B. Core

C. Primary winding

D. Secondary winding

A. Cellulose

B. Asbestos

C. Mica

D. Glass fibre

A. short-circuit test

B. back-to-back test

C. open circuit test

D. any of the above