Minimum voltage regulation occurs when the power factor of the load is_____________?

The leakage flux in a transformer depends upon______________?

A. load current
B. load current and voltage
C. load current, voltage and frequency
D. load current, voltage, frequency and power factor

A transformer can have regulation closer to zero___________?

A. on full-load
B. on overload
C. on leading power factor
D. on zero power factor

Delta/star transformer works satisfactorily when______________?

A. load is balanced only
B. load is unbalanced only
C. on balanced as well as unbalanced loads
D. none of the above

The function of conservator in a transformer is___________________?

A. to project against’internal fault
B. to reduce copper as well as core losses
C. to cool the transformer oil
D. to take care of the expansion and contraction of transformer oil due to variation of temperature of sur-roundings

Power transformers are generally designed to have maximum efficiency around__________?

A. no-load
B. half-load
C. near full-load
D. 10% overload

No-load current of a transformer has_____________?

A. has high magnitude and low power factor
B. has high magnitude and high power factor
C. has small magnitude and high power factor
D. has small magnitude and low power factor