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Machine Design

Machine Design
The included angle for the British standard whitworth thread is

29°
55°
47.5°
60°

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Machine Design
The ball bearings are provided with a cage

To facilitate slipping of balls
To maintain the balls at a fixed distance apart
To reduce friction
To prevent the lubricant from flowing out

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Machine Design
The sleeve or muff coupling is designed as a

Thick cylinder
Solid shaft
Hollow shaft
Dun cylinder

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Machine Design
For a bevel gear having the pitch angle θ, the ratio of formative number of teeth (TE) to actual number of teeth (T) is

1/tanθ
1/cosθ
sinθ cosθ
1/sinθ

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Machine Design
The shear modulus of resilience is proportional to

(Shear stress)3
(Shear stress)²
(Shear stress)⁴
Shear stress

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Machine Design
When the bolt is very yielding as compared to the connected members, then the resultant load on the bolt will be equal to the

Initial tension or external load, whichever is greater
External load applied
Initial tension
Sum of the initial tension and external load applied

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