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Machine Design

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

Leather
Balata gum
Rubber
Canvas or cotton duck

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Machine Design
A hot short metal is

Brittle when hot
Brittle under all conditions
Ductile at high temperature
Brittle when cold

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Machine Design
The most important dimension in the design of a nut is

Pitch diameter
Outside diameter
Inside diameter
Height

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Machine Design
Antifriction bearings are

Thin lubricated bearings
Sleeve bearings
Hydrodynamic bearings
None of these

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Machine Design
Euler’s formula for a mild steel column is not valid if the slenderness ratio is

100
60
90
120

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Machine Design
Shaft coupling is used in machinery to

Introduce protection against over loads
All of these
Reduce the transmission of shock loads
Introduce mechanical flexibility

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