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

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

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

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

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