Noise level test in a transformer is a______________?
Noise level test in a transformer is a______________?
A. special test
B. routine test
C. type test
D. none of the above
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Which of the following insulating materials can withstand the highest temperature safely ?
Which of the following insulating materials can withstand the highest temperature safely ?
A. Cellulose
B. Asbestos
C. Mica
D. Glass fibreDuring open circuit test of a transformer:
During open circuit test of a transformer:
A. primary is supplied rated voltage
B. primary is supplied full-load current
C. primary is supplied current at reduced voltage
D. primary is supplied rated kVAPower transformers are generally designed to have maximum efficiency around__________?
Power transformers are generally designed to have maximum efficiency around__________?
A. no-load
B. half-load
C. near full-load
D. 10% overloadMaterial used for construction of transformer core is usually___________________?
Material used for construction of transformer core is usually___________________?
A. wood
B. copper
C. aluminium
D. silicon steelOpen circuit test on transformers is conducted to determine____________?
Open circuit test on transformers is conducted to determine____________?
A. hysteresis losses
B. copper losses
C. core losses
D. eddy current lossesWhich winding in a transformer has more number of turns ?
Which winding in a transformer has more number of turns ?
A. Low voltage winding
B. High voltage winding
C. Primary winding
D. Secondary winding