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A. identified by the scarring of the commutator segment to which open circuited coil is connected
B. indicated by a spark completely around the commutator
C. both A. and (b)
D. none of the above
Related Mcqs:
- In D.C. generators, the cause of rapid brush wear may be___________?
- A. severe sparking B. rough commutator surface C. imperfect contact D. any of the above...
- The armature of D.C. generator is laminated to_______________?
- A. reduce the bulk B. provide the bulk C. insulate the core D. reduce eddy current loss...
- Equilizer rings are required in case armature is_______________?
- A. wave wound B. lap wound C. delta wound D. duplex wound...
- Which of the following generator will have negligible terminal voltage while running on no-load?
- A. Series generator B. Shunt generator C. Compound generator D. Separately excited generator...
- 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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