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Machine Design

Machine Design
Rankine's theory of failure is applicable for following type of materials

Plastic
Brittle
Ductile
Elastic

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Machine Design
Which is positive drive?

V belt drive
Timing belt
Flat belt drive
Crossed belt drive

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Machine Design
The material commonly used for machine tool bodies is

Aluminium
Cast iron
Mild steel
Brass

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Machine Design
When the material of key and shaft is same, and the width of key is one-fourth of the diameter of shaft (d), then length of key will be

1.57 d
1.2 d
1.8 d
0.8 d

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Machine Design
The bending stress in a curved beam is

Maximum at the neutral axis
None of these
Zero at the point other than centroidal axis
Zero at the centroidal axis

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Machine Design
The coefficient of friction in belt drive depends upon

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

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