A. poor insulation
B. Overload
C. loose connections
D. Core saturation
Which of the following is not a routine test on transformers ?
A. Core insulation voltage test
B. Impedance test
C. Radio interference test
D. Polarity test
Material used for construction of transformer core is usually___________________?
A. wood
B. copper
C. aluminium
D. silicon steel
In the transformer following winding has got more cross-sectional area______________?
A. Low voltage winding
B. High voltage winding
C. Primary winding
D. Secondary winding
In a transformer the energy is conveyed from primary to secondary_________?
A. through cooling coil
B. through air
C. by the flux
D. none of the above
Which winding in a transformer has more number of turns ?
A. Low voltage winding
B. High voltage winding
C. Primary winding
D. Secondary winding
Distribution transformers are generally designed for maximum efficiency around________________?
A. 90% load
B. zero load
C. 25% load
D. 50% load