Machine Design
In a hydrodynamic lubricated bearing

There is a thick film of lubricant between the journal and the bearing
The lubricant is forced between the journal and the bearing, by external pressure
There is no lubricant between the journal and the bearing
There is a thin film of lubricant between the journal and the bearing

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Machine Design
The ends of the leaves of a semi-elliptical leaf spring are made triangular in order to

Have variable bending moment (M) in each leaf
Obtain variable moment of inertia (I) in each leaf
Make M/I constant throughout the length of the leaf
Permit each leaf to act as an overhanging beam

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Machine Design
In case of V belt drive

The belt should not touch the bottom of groove in the pulley
The belt should touch the bottom of groove in the pulley
None of these
The belt should not touch the sides of groove in the pulley

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