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Machine Design

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

Bent
Crimped
Honed
Flared

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Machine Design
In a marine flange coupling, the thickness of flange is taken as

d/2
d/4
d/3
3d/4

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Machine Design
When a hole of diameter ‘d’ is punched in a metal of thickness 't', then the force required to punch a hole is equal to (where τu = Ultimate shear strength of the material of the plate)

π/4 × d² × tτu
π/4 × d².τu
t.τu
πd.t.τu

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Machine Design
The maximum normal stress theory is used for

Ductile materials
Plastic materials
Brittle materials
Non-ferrous materials

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Machine Design
When compared to the rod of the same diameter and material, a wire rope

Has a much smaller load carrying capacity
Does not provide much warning before failure
Is less flexible
Provides much greater time for remedial action before failure

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Machine Design
When a material is subjected to fatigue loading, the ratio of the endurance limit to the ultimate tensile strength is

0.65
0.2
0.5
0.35

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