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
Rolling of a complete ship sideways
Movement of a complete ship up and down in vertical plane about transverse axis
None of these

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Theory of Machine
A body is said to be under forced vibrations, when

A body vibrates under the influence of external force
None of these
No external force acts on a body, after giving it an initial displacement
There is a reduction in amplitude after every cycle of vibration

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Theory of Machine
In gears, interference takes place when

The tip of a tooth of a mating gear digs into the portion between base and root circles
Gear teeth are undercut
Pitch of the gears is not same
Gears do not move smoothly in the absence of lubrication

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