Theory of Machine
The secondary unbalanced force is maximum when the angle of inclination of the crank with the line of stroke is

Both (A) and (B)
0° and 90°
None of these
180° and 360°

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Theory of Machine
In a steam engine, one method of obtaining the earlier cut-off with a simple slide valve is by increasing the angle of advance of the eccentric while the throw of the eccentric, steam lap and exhaust lap are kept constant. This method will

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

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