Theory of Machine
In elliptical trammels

All four pairs are turning
Three pairs turning and one pair sliding
Two pairs turning and two pairs sliding
One pair turning and three pairs sliding

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Theory of Machine
The steering of a ship means

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

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