Mechanical Engineering MCQs

Page No. 130

The materials which exhibit the same elastic properties in all directions are called______________?


ahomogeneous


binelastic


cisotropic


disentropic


View Answer isotropic

The property of a material which allows it to be drawn into a smaller section is called________________?


aplasticity


bductility


celasticity


dmalleability


View Answer ductility

For which material the Poisson’s ratio is more than unity_________________?


asteel


bcopper


caluminium


dnone of the above


View Answer none of the above

The change in the unit volume of a material under tension with increase in its Poisson’s ratio will ________________?


aincrease


bdecrease


cremain same


dincrease initially and then decrease


View Answer decrease

If a material expands freely due to heating it will develop ____________________?


athermal stresses


btensile stress


cbending


dno stress


View Answer no stress

The stress necessary to initiate yielding is_________________?


aconsiderably greater than that necessary to continue it


bconsiderably lesser than that necessary to continue it


cgreater than that necessary to stop it


dlesser than that necessary to stop it



The elasticity of various materials is controlled by its___________________?


aultimate tensile stress


bproof stress


cstress at yield point


dstress at elastic limit



The ratio of direct stress to volumetric strain in case of a body subjected to three mutually perpendicular stresses of equal intensity, is equal to___________________?


aYoung’s modulus


bbulk modulus


cmodulus of rigidity


dmodulus of elasticity


View Answer bulk modulus

The internal reaction in bottom 80 cm length will be________________?


asame in both cases


bzero in first case


cdifferent in both cases


ddata are not sufficient to determine same


View Answer zero in first case

When it is indicated that a member is elastic, it means that when force is applied, it will________________?


anot deform


bbe safest


cstretch


dnot stretch


View Answer stretch

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