Machine Design
The piston pin bearings in heavy duty diesel engines are

Cylindrical roller bearings
Needle roller bearings
Spherical roller bearings
Tapered roller bearings

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Machine Design
In case of thick cylinders, the tangential stress across the thickness of cylinder is

Maximum at the outer surface and zero at the inner surface
Maximum at the inner surface and minimum at the outer surface
Maximum at the inner surface and zero at the outer surface
Maximum at the outer surface and minimum at the inner surface

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Machine Design
The elasticity is the property of a material which enables it to

Retain deformation produced under load permanently
Regains its original shape after deformation when the external forces are removed
Draw into wires by the application of a tensile force
Resists fracture due to high impact loads

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