Theory of Machine
In a steam engine, the link constitutes a

Connecting rod with big and small end brasses, caps and bolts
Piston, piston rod and cross-head
All of these
Crank pin, crankshaft and flywheel

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Theory of Machine
In a hydrodynamic journal bearing, there is

A forced lubricant between the journal and the bearing
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

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Theory of Machine
The magnitude of velocities of the points on a rigid link is

Directly proportional to the distance from the points to the instantaneous center and is perpendicular to the line joining the point to the instantaneous center
Inversely proportional to the distance from the points to the instantaneous center and is parallel to the line joining the point to the instantaneous center
Inversely proportional to the distance from the points to the instantaneous center and is perpendicular to the line joining the point to the instantaneous center
Directly proportional to the distance from the points to the instantaneous center and is parallel to the line joining the point to the instantaneous center

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