Theory of Machine
In order to balance the reciprocating masses,

Primary forces and couples must be balanced
Secondary forces and couples must be balanced
Both (A) and (B)
None of these

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Theory of Machine
The steering of a ship means

Turning of a complete ship in a curve towards right or left, while it moves forward
None of these
Movement of a complete ship up and down in vertical plane about transverse axis
Rolling of a complete ship sideways

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