Machine Design - Interview Questions | Exam2Win

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61. Which is correct statement ? Stress concentration in cyclic loading is

A. very serious in brittle materials and less serious in ductile materials

B. very serious in ductile materials and less serious in brittle materials

C. equally serious in both types of materials

D. seriousness would depend on other factors

E. none of the above.

Explanation:

62. For steel, the ultimate strength in shear as compared to ultimate strength in tension is

A. same

B. 1/2

C. 1/3

D. 1/4

E. 2/3

Explanation:

63. For applications involving high stresses in one direction only the following type of thread would be best suited

A. ISO metric thread

B. acme thread

C. square thread

D. buttress thread

E. British Association thread.

Explanation:

64. In nitrided parts, the origins of the fatigue cracks will occur at

A. surface

B. just below the surface

C. within the core

D. could occur anywhere

E. none of the above.

Explanation:

65. The ratio of endurance limit in shear to the endurance limit in flexure is

A. 0.33

B. 0.4

C. 0.5

D. 0.55

E. 0.6

Explanation: