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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

0.65
0.2
0.5
0.35

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Machine Design
Lewis equation in gears is used to find the

Compressive stress in bending
Tensile stress in bending
Fatigue stress
Shear stress

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Machine Design
The maximum normal stress theory is used for

Plastic materials
Brittle materials
Ductile materials
Non-ferrous materials

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Machine Design
Screws used for power transmission should have

Very fine threads
High efficiency
Strong teeth
Low efficiency

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Machine Design
The efficiency of a riveted joint is equal to

Pc /P
Least of Pt, Ps and Pc/P
Ps /P
Pt /P

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Machine Design
When a bolt is subjected to an external load, the stress induced in the bolt will be

Shear stress
Combined tensile and shear stress
Any one of these
Tensile stress

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