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Machine Design

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

Canvas or cotton duck
Leather
Balata gum
Rubber

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Machine Design
The coefficient of friction in belt drive depends upon

Material of pulley
Materials of belt and pulley
Material of belt
Belt velocity

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Machine Design
Stress concentration factor is defined as the ratio of

Nominal stress to the endurance limit
Maximum stress to the nominal stress
Maximum stress to the endurance limit
Nominal stress to the maximum stress

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Machine Design
The pitch diameter is the __________ diameter of an external or internal screw thread.

Smallest
Largest
Effective
None of these

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Machine Design
A universal coupling is used to connect two shafts

Have lateral misalignment
Which are not in exact alignment
Which are perfectly aligned
Whose axes intersect at a small angle

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Machine Design
A sliding bearing which can support steady loads without any relative motion between the journal and the bearing, is called

Zero film bearing
Hydrostatic lubricated bearing
Hydrodynamic lubricated bearing
Boundary lubricated bearing

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