A dc machine is run at rated speed in forward direction and then in b – McqOptions

MCQOPTIONS

1.	A dc machine is run at rated speed in forward direction and then in backward direction. It is observed that, speeds of the rotation are different, then it leads to the conclusion of _________
A.	incorrect brush placement
B.	incorrect pole and core alignment
C.	incorrect field supply
D.	all of the mentioned
Answer» B. incorrect pole and core alignment

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