Theory of Machine
The partial balancing means

Balancing partially reciprocating masses
Balancing partially revolving masses
All of these
Best balancing of engines

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Theory of Machine
In order to give the primary balance of the reciprocating parts of a multi-cylinder inline engines

The algebraic sum of the primary forces must be equal to zero
The algebraic sum of the couples about any point in the plane of the primary forces must be equal to zero
Both (A) and (B)
None of these

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