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Machine Design

Machine Design
A bench vice has following type of threads

Square
Buttress
Acme
Metric

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Machine Design
According to I.B.R., shearing resistance required to shear off the rivet per pitch length (in double shear) is (where n = Number of rivets per pitch length)

(π/4) d² × τ × n
3 × (π/4) d² × τ × n
1.875 × (π/4) d² × τ × n
2 × (π/4) d² × τ × n

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Machine Design
For a shaft diameter of 200 mm, the number of bolts in a marine flange coupling should be

6
8
4
10

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Machine Design
The resistance to fatigue of a material is measured by

Ultimate tensile strength
Young's modulus
Elastic limit
Endurance limit

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Machine Design
I.S. specifies following total number of grades of tolerances

20
18
22
16

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

Ductile
Plastic
Elastic
Brittle

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