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.Management Sciences
A. Insulation failure between two commutator bars
B. Insulation failure between two turns of a coil
C. Two of more turns of the same coil getting grounded
D. All of the above
Related Mcqs:
- A separately excited generator as compared to a self-excited generator_____________?
- A. is amenable to better voltage control B. is more stable C. has exciting current independent of load current D. has all above features...
- The resistance of armature winding depends on
- A. length of conductor B. cross-sectional area of the conductor C. number of conductors D. all of the above...
- The rapid wear of brushes takes place due to____________?
- A. abrasion from dust B. excessive spring pressure C. rough commutator bars D. high mica insulation between com-mutation bars E. all of the above factors...
- The e.m.f. generated by a shunt wound D.C. generator isE. Now while pole flux remains constant, if the speed of the generator is doubled, the e.m.f. generated will be_______________?
- A. E/2 B. 2E C. slightly less than E D. E...
- In a D.C. generator:___________________?
- A. external resistance = internal char-acteristic – armature reaction B. internal characteristic = magnetisation characteristic – ohmic drop C. external characteristic = magnetisation characteristic – ohmic drop – armature reaction D. magnetisation characteristic = external characteristic...
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