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Machine Design

Machine Design
Rankine's theory of failure is applicable for following type of materials

Plastic
Ductile
Elastic
Brittle

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Machine Design
A long helical spring having a spring stiffness of 12 kN/m and number of turns 20, breaks into two parts with number of turns 10 each in both the parts. If the two parts are connected in series, then the softness of the resultant spring will be

12 kN/m
30 kN/m
24 kN/m
6 kN/m

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Machine Design
The resistance to fatigue of a material is measured by

Elastic limit
Ultimate tensile strength
Endurance limit
Young's modulus

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Machine Design
The value of stress concentration factor depends upon

None of these
Material and geometry of the part
Geometry of the part
Material of the part

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Machine Design
If the tearing efficiency of a riveted joint is 75%, then the ratio of diameter of rivet to the pitch is equal to

0.5
0.2
0.6
0.25

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Machine Design
The rocker arms in internal combustion engines are of__________.

None of these
First type levers
Third type levers
Second type levers

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