Category: D.C. Generators

A. neutralising residual magnetism
B. creating residual magnetism by a D.C. source
C. making the magnetic losses of forces parallel
D. increasing flux density by adding extra turns of windings on poles

A. imperfect brush contact
B. field resistance less than the critical resistance
C. no residual magnetism in the generator
D. faulty shunt connections tending to reduce the residual magnetism

A. voltage generated is less than the rated voltage
B. generated voltage is proportional to the load on the generator
C. voltage remains constant irrespective of the load
D. speed varies in proportion to the load on the generator

A. Series field
B. Compensating field
C. Inter pole field
D. Shunt field

A. Graphite brushes
B. Carbon brushes
C. Metal graphite brushes
D. None of the above

A. the brushes of opposite polarity should track each other
B. the brushes of same polarity should track each other
C. brush position has no effect on the commutator grooving
D. None

A. sinusoidal
B. triangular
C. pulsating
D. flat topped

A. crossmagnetising
B. demagnetising
C. magnetising
D. none of above

A. lap winding
B. wave winding
C. delta winding
D. duplex wave winding

A. any even number of conductors
B. any odd number of conductors
C. that even number which is exact multiple of poles + 2
D. that even number which is exact multiple of poles