Balancing of rotating and reciprocating parts of an engine is necessar

1.	Balancing of rotating and reciprocating parts of an engine is necessary when it runs at
A.	slow speed
B.	moderate speed
C.	highs peed
D.	any one of these
Answer» D. any one of these

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Balancing of rotating and reciprocating parts of an engine is necessary when it runs at

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