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Machine Design

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

10
6
8
4

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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/sinθ
sinθ cosθ
1/cosθ
1/tanθ

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Machine Design
For standard coarse threads of nut, the threads will be as strong in failure by shear as the bolt in tension, if the height of nut (h) is approximately

0.7 times
0.6 times
0.4 times
0.8 times

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Machine Design
The size of a gear is usually specified by

Diametral pitch
Pitch circle diameter
Circular pitch
Pressure angle

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Machine Design
According to I.B.R., the factor of safety of riveted joint should not be less than

4
2
3
1

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Machine Design
A key way lowers

The rigidity of the shaft
The ductility of the shaft
Both the strength and rigidity of the shaft
The strength of the shaft

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