Download PDF
Free download in PDF Stress and Strain Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(1)
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
Answer: any one of the above
(2)
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
Answer: longitudinal stress and longitudinal strain
(3)
Deformation per unit length in the direction of force is known as
[A]
strain
[B]
lateral strain
[C]
linear strain
[D]
linear stress
(4)
The materials having same elastic properties in all directions are called
[A]
ideal materials
[B]
uniform materials
[C]
isotropic materials
[D]
paractical materials
Answer: isotropic materials
(5)
A thin mild steel wire is loaded by adding loads in equal increments till it breaks. The extensions noted with increasing loads will behave as under
[A]
uniform throughout
[B]
increase uniformly
[C]
first increase and then decrease
[D]
increase uniformly first and then increase rapidly
Answer: increase uniformly first and then increase rapidly
(6)
Modulus of rigidity is defined as the ratio of
[A]
longitudinal stress and longitudinal strain
[B]
volumetric stress and volumetric strain
[C]
lateral stress and lateral strain
[D]
shear stress and shear strain
Answer: shear stress and shear strain
(7)
Tensile strength of a material is obtained by dividing the maximum load during the test by the
[A]
area at the time of fracture
[B]
original cross-sectional area
[C]
average of (a) and (b)
[D]
None Of The Above
Answer: original cross-sectional area
(8)
The Young's modulus of a wire is defined as the stress which will increase the length of wire compared to its original length
[A]
half
[B]
same amount
[C]
double
[D]
one-fourth
(9)
Percentage reduction of area in performing tensile test on cast iron may be of the order of
[A]
50%
[B]
25%
[C]
0%
[D]
None of the Above
(10)
The intensity of stress which causes unit strain is called
[A]
unit stress
[B]
bulk modulus
[C]
modulus of rigidity
[D]
modulus of elasticity
Answer: modulus of elasticity
(11)
During a tensile test on a specimen of 1 cm cross-section, maximum load observed was 8 tonnes and area of cross-section at neck was 0.5 cm2. Ultimate tensile strength of specimen is
[A]
4 tonnes/cm2
[B]
8 tonnes/cm2
[C]
16 tonnes/cm2
[D]
22 tonnes/cm2
(12)
For steel, the ultimate strength in shear as compared to in tension is nearly
[A]
same
[B]
half
[C]
one-third
[D]
two-third
(13)
If a part is constrained to move and heated, it will develop
[A]
principal stress
[B]
tensile stress
[C]
compressive stress
[D]
None of the above
Answer: compressive stress
(14)
The value of modulus of elasticity for mild steel is of the order of
[A]
2.1xl05 kg/cm2
[B]
2.1 X 106 kg/cm2
[C]
2.1 x 107 kg/cm2
[D]
0.1 xlO6 kg/cm2
(15)
The value of Poisson's ratio for steel is between
[A]
0.01 to 0.1
[B]
0.23 to 0.27
[C]
0.25 to 0.33
[D]
0.4 to 0.6
(16)
The buckling load for a given material depends on
[A]
slenderness ratio and area of cross-section
[B]
Poisson's ratio and modulus of elasticity
[C]
slenderness ratio and modulus of elasticity
[D]
slenderness ratio, area of cross-section and modulus of elasticity
Answer: slenderness ratio, area of cross-section and modulus of elasticity
(17)
The total elongation produced in a bar of uniform section hanging vertically downwards due to its own weight is equal to that produced by a weight
[A]
of same magnitude as that of bar and applied at the lower end
[B]
half the weight of bar applied at lower end
[C]
half of the square of weight of bar applied at lower end
[D]
one-fourth of weight of bar applied at lower end
Answer: half the weight of bar applied at lower end
(18)
The property of a material by virtue of which a body returns to its original, shape after removal of the load is called
[A]
plasticity
[B]
elasticity
[C]
ductility
[D]
malleability
(19)
The materials which exhibit the same elastic properties in all directions are called
[A]
homogeneous
[B]
inelastic
[C]
isotropic
[D]
isentropic
(20)
The value of Poisson's ratio for cast iron is
(a)
[A]
0.1 to 0.2
[B]
0.23 to 0.27
[C]
0.25 to 0.33
[D]
0.4 to 0.6
Take Mock Tests