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DC Generators - Interview Questions and Answers

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101. A separately excited generator as compared to a self-excited generator
A. is amenable to better voltage con-trol
B. is more stable
C. has exciting current independent of load current
D. has all above features
Explanation:
102. The critical resistance of the D.C. generator is the resistance of
A. field
B. brushes
C. armature
D. load
Explanation:
103. 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
Explanation:
104. Which of the following generators will be preferred if they are required to be run in parallel ?
A. Shunt generators
B. Series generators
C. Compound generators
D. None of the above
Explanation:
105. In any rotating machine that part which houses the conductors and in which e.m.f. induced is to be utilised is called
A. rotor
B. stator
C. field
D. armature
Explanation:
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