Machine Design
The shear stress in a beam varies from zero at the outer fibers to a maximum at the________.

Upper surface
None of these
Neutral surface
Lower surface

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Machine Design
In oilness bearings

The oil film is maintained by supplying oil under pressure
Grease required to be applied after some intervals
The oil film pressure is generated only by the rotation of the journal
Do not require external supply of lubricant

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Machine Design
For unequal width of butt straps, the thicknesses of butt straps are

0.75 t for narrow strap on the inside and 0.625 t for wide strap on the outside
0.625 t for both the straps on the inside and outside
0.75 t for wide strap on the inside and 0.625 t for narrow strap on the outside
0.75 t for both the straps on the inside and outside

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