Theory of Machine
Which of the following mechanisms produces mathematically an exact straight line motion?

Grasshopper mechanism
Peaucellier's mechanism
Tchebicheff mechanism
Watt mechanism

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Theory of Machine
Which of the following property of the instantaneous center is correct?

The velocity of the instantaneous centre relative to any third rigid link is same whether the instantaneous centre is regarded as a point on the first rigid link or on the second rigid link.
The two rigid links have no linear velocity relative to each other at the instantaneous centre.
All of these
A rigid link rotates instantaneously relative to another link at the instantaneous centre for the configuration of the mechanism considered.

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Theory of Machine
In a steam engine, the earlier cut-off with a simple slide valve may be obtained by increasing the steam lap and the angle of advance of the eccentric but keeping constant the travel and lead of the valve, this method will

Reduce length of effective stroke of piston
Reduce maximum opening of port to steam
Cause withdrawing or throttling of steam
All of the listed here

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Theory of Machine
The steering of a ship means

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

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