A. on full-load
B. on overload
C. on leading power factor
D. on zero power factor
Month: June 2018
A. zero
B. 10 Q
C. 1000 Q
D. infinity
A. avoids core saturation and high voltage induction
B. is safe to human beings
C. protects the primary circuit
D. none of the above
A. high eddy current losses
B. reduced magnetic leakage
C. negligibly hysteresis losses
D. none of the above
A. 1.5 MVA
B. 5 MVA
C. 15 MVA
D. 50 MVA
A. frequency
B. area of the core
C. flux density of the core material
D. A. and B. both
A. Step-up transformer
B. Step-down transformer
C. Potential transformer
D. Current transformer
A. to provide oxygen inside the tank
B. to cool the coils during reduced load
C. to cool the transformer oil
D. to arrest flow of moisture when outside air enters the transformer
A. about the same
B. much smaller
C. much higher
D. somewhat smaller
E. none of the above
A. low,low
B. high,high
C. low,high
D. high,low
