Theory of Machine
Which of the following statement is correct for involute gears?

The variation in centre distance of shafts increases radial force.
The interference is inherently absent.
The pressure angle is constant throughout the teeth engagement.
A convex flank is always in contact with concave flank.

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Theory of Machine
The steering of a ship means

Rolling of a complete ship sideways
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

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