Gas is usually not liberated due to dissociation of transformer oil unless the oil temperature exceeds?
Gas is usually not liberated due to dissociation of transformer oil unless the oil temperature exceeds?
A. 50°C
B. 80°C
C. 100°C
D. 150°C
Similar Posts
The no-load current drawn by transformer is usually what per cent of the full-load current ?
The no-load current drawn by transformer is usually what per cent of the full-load current ?
A. 0.2 to 0.5 per cent
B. 2 to 5 per cent
C. 12 to 15 per cent
D. 20 to 30 per centIron loss of a transformer can be measured by____________?
Iron loss of a transformer can be measured by____________?
A. low power factor wattmeter
B. unity power factor wattmeter
C. frequency meter
D. any type of wattmeterWhich of the following does not change in a transformer ?
Which of the following does not change in a transformer ?
A. Current
B. Voltage
C. Frequency
D. All of the aboveIn 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 aboveWhich winding of the transformer has less cross-sectional area?
Which winding of the transformer has less cross-sectional area?
A. Primary winding
B. Secondary winding
C. Low voltage winding
D. High voltage windingThe chemical used in breather for transformer should have the quality of____________?
The chemical used in breather for transformer should have the quality of____________?
A. ionizing air
B. absorbing moisture
C. cleansing the transformer oil
D. cooling the transformer oil