Machine Design
The objective of 'crowning' of the flat pulleys of belt drive is to

Increase the power transmission capacity
Increase the belt velocity
Prevent the belt joint from damaging the belt surface
Prevent the belt from running off the pulley

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Machine Design
Turn buckle has

Right hand threads on bout ends
Left hand threads on one end and right hand threads on other end
Left hand threads on both ends
No threads

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Machine Design
According to Indian standard specifications, 100 H6/g5 means that

Tolerance grade for the shaft is 4 to 8 and for the hole is 3 to 7
Tolerance grade for the shaft is 6 and for the hole is 5
Tolerance grade for the hole is 6 and for the shaft is 5
Tolerance grade for the hole is 4 to 8 and for the shaft is 3 to 7

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