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Machine Design

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

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

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Machine Design
The value of stress concentration factor depends upon

Material and geometry of the part
None of these
Material of the part
Geometry of the part

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Machine Design
The process which improves the machinability of steels, but lowers the hardness and tensile strength is

Normalising
Spheroidising
Full annealing
Process annealing

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Machine Design
Auto frettage is the method of

Pre-stressing thick cylinders
Increasing the life of thick cylinders
Calculating stresses in thick cylinders
Joining thick cylinders

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Machine Design
Factor of safety for fatigue loading is the ratio of

Young's modulus to the ultimate tensile strength
Endurance limit to the working stress
Elastic limit to the yield point
Elastic limit to the working stress

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Machine Design
For a shoe brake, the equivalent coefficient of friction is equal to (where μ = Actual coefficient of friction, and θ = Semi-block angle)

2μ sinθ/(θ + sinθ)
4μ sinθ/(θ + sinθ)
4μ sinθ/(2θ + sin 2θ)
μ sinθ/(2θ + sin 2θ)

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