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Machine Design

Machine Design
When a material is subjected to fatigue loading, the ratio of the endurance limit to the ultimate tensile strength is

0.5
0.2
0.65
0.35

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Machine Design
The surface finish factor for a mirror polished material is

0.65
0.45
1
0.85

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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

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

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Machine Design
The wear load should be __________ the dynamic load.

Equal to
Less than
Greater than
None of these

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Machine Design
Soderberg relation is based on __________ of the material whereas all other failure relation for dynamic loading are based on ultimate strength of the material.

Elastic strength
Yield strength
None of these
Shear strength

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Machine Design
A connecting rod is designed as a

All of these
Strut
Short column
Long column

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