Mechanical Engineering MCQs

Page No. 135

The value of Poisson’s ratio for cast iron is_________________?


a0.1 to 0.2

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b0.23 to 0.27

✓


c0.25 to 0.33

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d0.4 to 0.6

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View Answer 0.23 to 0.27

Flow stress corresponds to___________________?


afluids in motion

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bbreaking point

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cplastic deformation of solids

✓


drupture stress

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The stress at which extension of the material takes place more quickly as compared to the increase in load is called______________?


aelastic point of the material

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bplastic point of the material

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cbreaking point of the material

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dyielding point of the material

✓



The ratio of lateral strain to the linear strain within elastic limit is known as_______________?


aYoung’s modulus

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bbulk modulus

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cmodulus of rigidity

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dPoisson’s ratio

✓


View Answer Poisson’s ratio

Rupture stress is________________?


abreaking stress

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bmaximum load/original cross-sectional area

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cload at breaking point/A

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dload at breaking point/neck area

✓



In the tensile test, the phenomenon of slow extension of the material, i. e. stress increasing with the time at a constant load is called_____________?


acreeping

✓


byielding

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cbreaking

✖


dplasticity

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View Answer creeping

In a tensile test, near the elastic limit zone, the______________?


atensile strain increases more quickly

✓


btensile strain decreases more quickly

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ctensile strain increases in proportion to the stress

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dtensile strain decreases in proportion to the stress

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The percentage reduction in area of a cast iron specimen during tensile test would be of the order of_________________?


amore than 50%

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b25—50%

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c10—25%

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dnegligible

✓


View Answer negligible

The property of a material by virtue of which it can be beaten or rolled into plates is called _________________?


amalleability

✓


bductility

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cplasticity

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delasticity

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View Answer malleability

Poisson’s ratio is defined as the ratio of_________________?


alongitudinal stress and longitudinal strain

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blongitudinal stress and lateral stress

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clateral stress and longitudinal stress

✓


dlateral stress and lateral strain

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