Month: June 2018

A. at no load
B. at 50% full load
C. at 80% full load
D. at full load

A. nearly full load
B. 70% full load
C. 50% full load
D. no load

A. 3000 kVA
B. 1000 kVA
C. 500 kVA
D. 250 kVA

A. provide fresh air for cooling the transformer
B. supply cooling oil to transformer in time of need
C. protect the transformer from damage when oil expends due to heating
D. none of the above

A. supply frequency
B. load current
C. power factor of load
D. both B. and (c)

A. 180°
B. 120″
C. 90°
D. 75°

A. natural air cooling
B. air blast cooling
C. oil cooling
D. any of the above

A. friction and windage losses
B. copper losses
C. hysteresis and eddy current losses
D. none of the above

A. 100 per cent
B. 98 per cent
C. 50 per cent
D. 25 per cent

A. Low voltage winding
B. High voltage winding
C. Primary winding
D. Secondary winding