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DC Generators - Interview Questions and Answers

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96. In a D.C. generator in case the resistance of the field winding is increased, then output voltage will
A. increase
B. decrease
C. remain unaffected
D. fluctuate heavily
Explanation:
97. The terminal voltage of a D.C. shunt generator drops on load because of all of the following reasons except
A. armature reaction
B. armature resistance drop
C. field weakening due to armature reaction and armature
D. commutation
Explanation:
98. An exciter for a turbo generator is a
A. separately excited generator
B. shunt generator
C. series generator
D. compound generator
Explanation:
99. In a D.C. machine stray loss is the sum of
A. total copper loss and mechanical loss
B. armature copper loss and iron loss
C. shunt field copper loss and mechanical loss
D. iron loss and mechanical loss
Explanation:
100. In a separately excited generator supplying rated load the armature reaction ,
A. is always present
B. is always absent
C. may be sometimes present
D. none of the above
Explanation:
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