Month: June 2018

A. low power factor wattmeter
B. unity power factor wattmeter
C. frequency meter
D. any type of wattmeter

A. Core loss
B. Friction loss
C. Eddy current loss
D. Hysteresis loss

A. capacitive only
B. inductive only
C. inductive or resistive
D. none of the above

A. low voltage side of high kVA transformers
B. high frequency transformers
C. high voltage side of small capacity transformers
D. high voltage side of high kVA rating transformers

A. not change
B. decrease
C. increase
D. any of the above

A. Core insulation voltage test
B. Impedance test
C. Radio interference test
D. Polarity test

A. leading power factor
B. lagging power factor
C. unity power factor
D. zero power factor

A. copper loss = iron loss
B. copper loss iron loss
D. none of the above

A. special test
B. routine test
C. type test
D. none of the above

A. value of transformation ratio remains constant
B. permeability of transformer core remains constant
C. core flux remains practically constant
D. primary voltage remains constant
C. secondary voltage remains constant