Basic Mechanical Engineering_SOM

The property by which a body returns to its original shape after removal of the force is called __________

• a) Plasticity

• b) Elasticity

• c) Ductility

• d) Malleability

The property of a material by which it can be beaten or rolled into thin plates is called __________

• a) Malleability

• b) Plasticity

• c) Ductility

• d) Elasticity

Which law is also called as the elasticity law?

• a) Bernoulli’s law

• b) Stress law

• c) Hooke’s law

• d) Poisson’s law

The materials which have the same elastic properties in all directions are called __________

• a) Isotropic

• b) Brittle

• c) Homogeneous

• d) Hard

A member which does not regain its original shape after removal of the load producing deformation is said __________

• a) Plastic

• b) Elastic

• c) Rigid

• d) None of the mentioned

The body will regain it is previous shape and size only when the deformation caused by the external forces, is within a certain limit. What is that limit?

• a) Plastic limit

• b) Elastic limit

• c) Deformation limit

• d) None of the mentioned

As the elastic limit reaches, tensile strain __________

• a) Increases more rapidly

• b) Decreases more rapidly

• c) Increases in proportion to the stress

• d) Decreases in proportion to the stress

The section modulus of a circular section about an axis through its C.G., is

• (A) πd²/4

• (B) πd²/16

• (C) πd³/16

• (D) πd³/32

If a part is constrained to move and heated, it will develop

• (A) Principal stress

• (B) Tensile stress

• (C) Compressive stress

• (D) Shear stress

At ________ the shearing stress in a beam are maximum.

• a) Extreme fibres

• b) Modulus of section

• c) Neutral axis

• d) Along the cross-sectional area