An ideal transformer will have maximum efficiency at a load such that?
An ideal transformer will have maximum efficiency at a load such that?
A. copper loss = iron loss
B. copper loss iron loss
D. none of the above
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The function of conservator in a transformer is___________________?
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-roundingsOpen circuit test on transformers is conducted to determine____________?
Open circuit test on transformers is conducted to determine____________?
A. hysteresis losses
B. copper losses
C. core losses
D. eddy current lossesIn a transformer the tappings are generally provided on_____________?
In a transformer the tapgs are generally provided on_____________?A. primary side
B. secondary side
C. low voltage side
D. high voltage sideWhich of the following properties is not necessarily desirable for the material for transformer core ?
Which of the following properties is not necessarily desirable for the material for transformer core ?
A. Low hysteresis loss
B. High permeability
C. High thermal conductivity
D. Adequate mechanical strengthThe path of a magnetic flux in a transformer should have______________?
The path of a magnetic flux in a transformer should have______________?A. high resistance
B. high reluctance
C. low resistance
D. low reluctanceIn the transformer the function of a conservator is to_______________?
In the transformer the function of a conservator is to_______________?
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