A Transformer transforms____________?
A Transformer transforms____________?
A. voltage
B. current
C. current and voltage
D. power
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For the parallel operation of single phase transformers it is necessary that they should have___________?
For the parallel operation of single phase transformers it is necessary that they should have___________?
A. same efficiency
B. same polarity
C. same kVA rating
D. same number of turns on the secondary side.While conducting short-circuit test on a transformer the following side is short circuited?
While conducting short-circuit test on a transformer the following side is short circuited?
A. High voltage side
B. Low voltage side
C. Primary side
D. Secondary sideThe efficiency of a transformer will be maximum when_____________?
The efficiency of a transformer will be maximum when_____________?
A. copper losses = hysteresis losses
B. hysteresis losses = eddy current losses
C. eddy current losses = copper losses
D. copper losses = iron lossesShort circuit test on transformers is conducted to determine____________?
Short circuit test on transformers is conducted to determine____________?
A. hysteresis losses
B. copper losses
C. core losses
D. eddy current lossesThe chemical used in breather is_______________?
The chemical used in breather is_______________?
A. asbestos fiber
B. silica sand
C. sodium chloride
D. silica gelWhich of the following acts as a protection against high voltage surges due to lightning and switching ?
Which of the following acts as a protection against high voltage surges due to lightning and switching ?
A. Horn gaps
B. Thermal overload relays
C. Breather
D. Conservator