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Machine Design

Machine Design
The suitable material for belt used in flour mill is

Balata gum
Canvas or cotton duck
Leather
Rubber

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Machine Design
A double strap butt joint (with equal straps) is

Always in single shear
Either in single shear or double shear
Always in double shear
Any one of these

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Machine Design
The shock absorbing capacity of a bolt can be increased by

Tightening it properly
Grinding the shank
Increasing shank diameter
Making shank diameter equal to core diameter of thread

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Machine Design
Belt slip may occur due to

Driving pulley too small
Heavy load
All of these
Loose belt

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Machine Design
If the centre distance of the mating gears having involute teeth is varied within limits, the velocity ratio

Decreases
Increases
None of these
Remains unchanged

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Machine Design
In a flat belt drive, if the slip between the driver and belt is 1 %, between the belt and follower is 3% and driver and follower pulley diameters are equal, then velocity ratio of the drive will be

0.96
0.97
0.98
0.99

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