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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