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Machine Design - Interview Questions and Answers

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56. If a material fails below its yield point, failure would be due to
A. straining
B. fatigue
C. creep
D. sudden loading
E. impact loading.
Explanation:
57. Resilience of a material is important, when it is subjected to
A. combined loading
B. fatigue
C. thermal stresses
D. wear and tear
E. shock loading.
Explanation:
58. The endurance limit in shear of carbon steel can be obtained by multiplying the endurance limit in flexure by a factor of
A. 0.25
B. 0.45
C. .55
D. 0.65
E. 0.75.
Explanation:
59. At low temperatures (say 75�C) the notched-bar impact value of steel
A. increases markedly
B. decreases markedly
C. remains same
D. depends on heat treatment carried out
E. none of the above.
Explanation:
60. Residual stress in materials
A. acts when external load is applied
B. becomes zero when external load is removed
C. is independent of external loads
D. is always harmful
E. is always beneficial.
Explanation:
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