Machine Design
In a horizontal flat belt drive, it is customary to use

None of these
Bottom side of belt as slack side
Top side of belt as slack side
Idler pulley

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Machine Design
In oilness bearings

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

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Machine Design
A bolt

Has head at one end and other end fits into a tapped hole in the other part to be joined
Has a head on one end and a nut fitted to the other
Is provided with pointed threads
Has both the ends threaded

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