Machine Design
In a boundary lubricated bearing, there is a __________ of lubricant between the journal and the bearing.

None of these
Thick film
Either A or B
Thin film

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Machine Design
In worm, gears, pitch lead angle is

The angle between the tangent to the pitch helix and the plane of rotation
None of these
Half the angle between two inclined faces in axial plane
The angle between the tangent to the pitch helix and an element of the cylinder

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