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Machine Design

Machine Design
The ratio of endurance limit in shear to the endurance limit in flexure is

0.4
0.33
0.55
0.5

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Machine Design
The velocity factor for precision metallic gears cut with high accuracy and operating at velocities up to 20 m/s is equal to

0.75/ (0.75 + √v)
6/ (6 + v)
4.5/ (4.5 + v)
3/ (3 + v)

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Machine Design
The ultimate strength of steel in tension in comparison to shear is in the ratio of

0.085416666666667
0.12638888888889
0.042361111111111
0.084027777777778

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Machine Design
The velocity factor for ordinary cut gears operating at velocities up to 12.5 m/s is equal to

6/(6 + v)
4.5/(4.5 + v)
3/(3 + v)
0.75/(0.75 + √v)

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Machine Design
The draw of cotter need not exceed

3 mm
5 mm
20 mm
10 mm

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Machine Design
When a bolt is subjected to shock loading, the resilience of the bolt should be considered in order to prevent breakage at the

Shank
Middle
Thread
Head

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