Machine Design
When the shaft rotates in anticlockwise direction at high speed in a bearing, it will

Move towards right of the bearing making metal to metal contact
Move towards left of the bearing making metal to metal contact
Have contact at the bottom most of the bearing
Move towards right of the bearing making no metal to metal contact

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Machine Design
In worm, gears, pitch lead angle is

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

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