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Machine Design

Machine Design
The ratio of circumferential stress to longitudinal stress in a thin cylinder subjected to an internal pressure is

4
1
43832
2

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Machine Design
A sliding bearing which can support steady loads without any relative motion between the journal and the bearing, is called

Hydrodynamic lubricated bearing
Hydrostatic lubricated bearing
Zero film bearing
Boundary lubricated bearing

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Machine Design
Failure of a material is called fatigue when it fails

Below the yield point
At the yield point
At the elastic limit
Below the elastic limit

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

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

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Machine Design
For steel, the ultimate strength in shear as compared to ultimate strength in tension is

43832
43864
43833
43834

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Machine Design
The endurance limit in shear of carbon steel can be obtained by multiplying the endurance limit in flexure by a factor of

0.65
0.75
0.55
0.45

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