DC Generators - Interview Questions | Exam2Win

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11. With a D.C. generator which of the following regulation is preferred ?

A. 100% regulation

B. infinite regulation

C. 50% regulation

D. 1% regulation

Explanation:

12. For both lap and wave windings, there are as many commutator bars as the number of

A. slots

B. armature conductors

C. winding elements

D. poles

Explanation:

13. Brushes of D.C. machines are made of

A. carbon

B. soft copper

C. hard copper

D. all of above

Explanation:

14. As a result of armature reaction, the reduction in the total mutual air gap flux in a D.C. generator is approximately

A. 40 percent

B. 25 percent

C. 10 percent

D. 5 percent

Explanation:

15. The series field of a short-shunt D.C. generator is excited by

A. external current

B. armature current

C. shunt current

D. load current

Explanation: