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Which of the following is the major consideration to evolve a good design?A. Cost B. Durability C. Compliance with performance criteria as laid down in specifications D. All of the above
The input impedance of a JFET is _____________that of an ordinary transistor? A. equal to B. less thanC. more than D. none of the above
The cold rolled grain oriented steel has _________ permeability in the direction of the grain orientation? A. minimumB. maximum C. nil D. none of the above
Cylindrical windings using circular conductors, employed in transformers, are_____________? A. single layered B. double layeredC. multi-layered D. none of the above
Multi-layer helical windings are commonly used in the transformers as high voltage windings_______________? A. upto 20 kV B. upto 50 kV C. upto 80 kVD. for 110 kV and above
The cold rolled grain oriented steel has ___________ permeability in the direction of the grain orientation? A. minimumB. maximum C. nil D. none of the above
Helical windings are used in________________? A. distribution transformersB. power transformers C. shell type transformers D. none of the above
Disc windings are primarily used in_____________-? A. short capacity transformers B. medium capacity transformersC. high capacity transformers D. any of the above
The forced oil and air circulation method is usual one for transformers of capacities____________? A. upto 5 MVA B. upto 10 MVA C. upto 20 MVAD. 30 MVA upwards
The heat dissipating capability of transformers of ratings higher than 30 kVA in increased by providing which of the following ? A. Corrugations B. Fins C. Tubes D. Radiator tanksE. All of the above