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Machine Design

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

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

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Machine Design
The centre distance between two meshing involute gears is equal to

Difference of base circle radii/cosφ
Sum of base circle radii/cosφ
Difference of pitch circle radii/cosφ
Sum of pitch circle radii/cosφ

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Machine Design
The washer is generally specified by its

Mean diameter
Outer diameter
Thickness
Hole diameter

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Machine Design
Which of the following key is preferred for the condition when a large amount of impact type torque is to be transmitted in both direction of rotation?

Gib-head key
Feather key
Tangent key
Woodruff key

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Machine Design
Allen bolts are

Designed for shock load
Self locking bolts
Provided with hexagonal depression in head
Used in aircraft application

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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)

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

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