A transformer oil must be free from________________?
A transformer oil must be free from________________?
A. sludge
B. odour
C. gases
D. moisture
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Which of the following insulating materials can withstand the highest temperature safely ?
Which of the following insulating materials can withstand the highest temperature safely ?
A. Cellulose
B. Asbestos
C. Mica
D. Glass fibreThe maximum load that a power transformer can carry is limited by its________________?
The maximum load that a power transformer can carry is limited by its________________?
A. temperature rise
B. dielectric strength of oil
C. voltage ratio
D. copper lossIn a given transformer for a given applied voltage, losses which remain constant irrespective of load changes are__________?
In a given transformer for a given applied voltage, losses which remain constant irrespective of load changes are__________?
A. hysteresis and eddy current losses
B. friction and windage losses
C. copper losses
D. none of the aboveThe noise produced by a transformer is termed as_______________________?
The noise produced by a transformer is termed as_______________________?
A. zoom
B. hum
C. ringing
D. buzzHysteresis loss in a transformer varies as CBmax = maximum flux density) ?
Hysteresis loss in a transformer varies as CBmax = maximum flux density) ?
A. Bmax
B. Bmax1-6
C. Bmax1-83
D. B maxIn a given transformer for given applied voltage, losses which remain constant irrespective of load changes are______________?
In a given transformer for given applied voltage, losses which remain constant irrespective of load changes are______________?
A. friction and windage losses
B. copper losses
C. hysteresis and eddy current losses
D. none of the above