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Machine Design

Machine Design
If a spring is cut down into two springs, the stiffness of cut springs will be

Double
Same
None of these
Half

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Machine Design
The fatigue life of a part can be improved by

Coating
Shot peening
Electroplating
Polishing

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Machine Design
Brittle coating technique is used for

Protecting metal against wear and tear
Determining brittleness
Experimental stress analysis
Protecting metal against corrosion

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Machine Design
The ball bearings are, usually, made from

Medium carbon steel
High speed steel
Low carbon steel
High carbon steel

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Machine Design
Shaft coupling is used in machinery to

All of these
Introduce mechanical flexibility
Reduce the transmission of shock loads
Introduce protection against over loads

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Machine Design
In case of pressure vessels having open ends, the fluid pressure induces

Longitudinal stress
Circumferential stress
None of these
Shear stress

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