Mechanical Engineering MCQs

Page No. 135

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


a0.1 to 0.2


b0.23 to 0.27


c0.25 to 0.33


d0.4 to 0.6


View Answer 0.23 to 0.27

Flow stress corresponds to___________________?


afluids in motion


bbreaking point


cplastic deformation of solids


drupture stress



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


bplastic point of the material


cbreaking point of the material


dyielding point of the material



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


aYoung’s modulus


bbulk modulus


cmodulus of rigidity


dPoisson’s ratio


View Answer Poisson’s ratio

Rupture stress is________________?


abreaking stress


bmaximum load/original cross-sectional area


cload at breaking point/A


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


cbreaking


dplasticity


View Answer creeping

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


atensile strain increases more quickly


btensile strain decreases more quickly


ctensile strain increases in proportion to the stress


dtensile strain decreases in proportion to the stress



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


amore than 50%


b25—50%


c10—25%


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


cplasticity


delasticity


View Answer malleability

Poisson’s ratio is defined as the ratio of_________________?


alongitudinal stress and longitudinal strain


blongitudinal stress and lateral stress


clateral stress and longitudinal stress


dlateral stress and lateral strain



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