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Machine Design

Machine Design
The usual proportion for the width of key is (where d = Diameter of shaft or diameter of hole in the hub)

d/6
d/8
d/2
d/4

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Machine Design
If two springs are in parallel then their overall stiffness will be

Half
None of these
Same
Double

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Machine Design
In order to permit the thermal expansion/contraction of tubing, it should be

Flared
Crimped
Honed
Bent

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Machine Design
A steel containing 0.8% carbon is known as

Eutectoid steel
None of these
Hypereutectoid steel
Hypo-eutectoid steel

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Machine Design
In static loading, stress concentration is more serious in

Ductile materials
Brittle materials
Elastic materials
Brittle as well as ductile materials

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Machine Design
The ball bearings are, usually, made from

Low carbon steel
High speed steel
Medium carbon steel
High carbon steel

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