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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
If a shaft made from ductile material is subjected to combined bending and twisting moment, calculations based on which one of the following failure theories will give the most conservative value?

Maximum distortion energy theory
Maximum strain energy theory
Maximum principal stress theory
Maximum shear stress theory

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Machine Design
The stress in the threaded part of the bolt will be __________ as compared to the shank.

Same
Lower
Higher
None of these

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Machine Design
In a flange coupling, the bolts are subjected to

None of these
Tensile stress
Shear stress
Compressive stress

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Machine Design
In helical gears, the distance parallel to the axis, between similar faces of adjacent teeth, is called

Normal pitch
Diametral pitch
Axial pitch
Module

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Machine Design
The dedendum is the radial distance from the

Pitch circle to the bottom of a tooth
Addendum circle to the clearance circle
Top of a tooth to the bottom of a tooth
Pitch circle to the top of a tooth

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