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

90° and 180°
180° and 360°
0° and 90°
0° and 180°

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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

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

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Theory of Machine
In a hydrodynamic journal bearing, there is

No lubricant between the journal and the bearing
A thick film of lubricant between the journal and the bearing
A very thin film of lubricant between the journal and the bearing such that there is contact between the journal and the bearing
A forced lubricant between the journal and the bearing

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