A. core
B. windings
C. tank
D. any of the above
Related Mcqs:
- The changes in volume of transformer cooling oil due to variation of atmospheric temperature during day and night is taken care of by which part of transformer?
A. Conservator
B. Breather
C. Bushings
D. Buchholz relay - For a transformer, operating at constant load current, maximum efficiency will occur at______________?
A. 0.8 leading power factor
B. 0.8 lagging power factor
C. zero power factor
D. unity power factor - Which of the following is the main advantage of an auto-transformer over a two winding transformer?
A. Hysteresis losses are reduced
B. Saving in winding material
C. Copper losses are negligible
D. Eddy losses are totally eliminated - Losses which occur in rotating electric machines and do not occur in transformers are___________?
A. friction and windage losses
B. magnetic losses
C. hysteresis and eddy current losses
D. copper losses - 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 losses - The maximum efficiency of a distribution transformer is____________?
A. at no load
B. at 50% full load
C. at 80% full load
D. at full load - Hysteresis loss in a transformer varies as CBmax = maximum flux density) ?
A. Bmax
B. Bmax1-6
C. Bmax1-83
D. B max - 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 - 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 loss - 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
