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Machine Design

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

Ductile
Elastic
Plastic
Brittle

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Machine Design
Stress concentration factor is defined as the ratio of

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

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Machine Design
Idler pulley is used for

Changing the direction of motion of belt
For applying tension
All of these
Increasing velocity ratio

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Machine Design
Rankine's theory is used for

Brittle materials
Ductile materials
Plastic materials
Elastic materials

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Machine Design
A key capable of tilting in a recess milled out in a shaft is known as

Feather key
Hollow saddle key
Woodruff key
Flat saddle key

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Machine Design
Fabric belts are used in industrial applications because

None of these
They are unaffected by moisture and humidity
They are cheap
They can work at high temperature

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