A. Conservator
B. Breather
C. Buchholz relay
D. Exciter
Transformers
Transformers
A. provide support to windings
B. reduce hysteresis loss
C. decrease the reluctance of the magnetic path
D. reduce eddy current losses
A. lags behind the voltage by about 75°
B. leads the voltage by about 75°
C. lags behind the voltage by about 15°
D. leads the voltage by about 15°
A. copper losses = hysteresis losses
B. hysteresis losses = eddy current losses
C. eddy current losses = copper losses
D. copper losses = iron losses
A. 1.7 Wb/m2
B. 2.7 Wb/m2
C. 3.7 Wb/m2
D. 4.7 Wb/m2
A. temperature
B. stray losses
C. all-day efficiency
D. none of the above
A. lkV
B. 33 kV
C. 100 kV
D. 330 kV
A. copper loss
B. magnetising current
C. magnetising current and loss
D. efficiency of the transformer
A. high resistance
B. high reluctance
C. low resistance
D. low reluctance
A. 0.2 to 0.5 per cent
B. 2 to 5 per cent
C. 12 to 15 per cent
D. 20 to 30 per cent
