The impact strength of a material is an index of its ___________________?
(A) toughness
(B) tensile strength
(C) capability of being cold worked
(D) hardness
(D) fatigue strength
Strain is defined as the ratio of__________________?
(A) change in volume to original volume
(B) change in length to original length
(C) change in cross-sectional area to original cross-sectional area
(D) any one of the above
(D) none of the above
The materials having same elastic properties in all directions are called________________?
(A) ideal materials
(B) uniform materials
(C) isotropic materials
(D) paractical materials
(D) elastic materials
Deformation per unit length in the direction of force is known as_________________?
(A) strain
(B) lateral strain
(C) linear strain
(D) linear stress
(D) unit strain
Young’s modulus is defined as the ratio of ___________________?
(A) volumetric stress and volumetric strain
(B) lateral stress and lateral strain
(C) longitudinal stress and longitudinal strain
(D) shear stress to shear strain
(D) longitudinal stress and lateral strain
In a vapor compression cycle, the refrigerant immediately after expansion valve is___________________?
(A) liquid
(B) sub-cooled liquid
(C) saturated liquid
(D) wet vapour
(D) dry vapour
Absorption system normally uses the following refrigerant___________________?
(A) Freon-11
(B) Freon-22
(C) C02
(D) S02
(D) ammonia
In a tensile test, near the elastic limit zone, the______________?
(A) tensile strain increases more quickly
(B) tensile strain decreases more quickly
(C) tensile strain increases in proportion to the stress
(D) tensile strain decreases in proportion to the stress
(D) tensile strain remains constant
The percentage reduction in area of a cast iron specimen during tensile test would be of the order of_________________?
(A) more than 50%
(B) 25—50%
(C) 10—25%
(D) 5—10%
(D) negligible
The property of a material by virtue of which it can be beaten or rolled into plates is called _________________?
(A) malleability
(B) ductility
(C) plasticity
(D) elasticity
(D) reliability