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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

0.2
0.35
0.5
0.65

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Machine Design
According to Indian standard specifications, plain carbon steel designated by 40C8 contains carbon

0.40 to 0.60%
0.35 to 0.45%
0.20 to 0.40%
None of these

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Machine Design
A shaft is subjected to a maximum bending stress of 80 N/mm² and maximum shearing stress equal to 30 N/mm² at a particular section. If the yield point in tension of the material is 280 N/mm² and the maximum shear stress theory of failure is used, then the factor of safety obtained will be

2.5
3.5
2.8
3

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Machine Design
A key made from a cylindrical disc having segmental cross-section, is known as

Woodruff key
Gib head key
Flat saddle key
Feather key

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Machine Design
A leaf spring in automobiles is used

To store strain energy
To absorb shocks
To measure forces
To apply forces

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Machine Design
The strength of a riveted joint is equal to

Tearing strength of plate (Pt)
Shearing strength of rivet (Ps)
Least value of Pt Ps and Pc
Crushing strength of rivet (Pc)

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