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Free download in PDF Stress and Strain Objective Type 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.
(21)
Poisson's ratio is defined as the ratio of
[A]
longitudinal stress and longitudinal strain
[B]
longitudinal stress and lateral stress
[C]
lateral stress and longitudinal stress
[D]
lateral stress and lateral strain
Answer: lateral stress and longitudinal stress
(22)
The property of a material by virtue of which it can be beaten or rolled into plates is called
[A]
malleability
[B]
Infrastructure, exploration, analysis, exploitation, interpretation
[C]
ductility
[D]
plasticity
(23)
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]
negligible
(24)
If a material expands freely due to heating it will develop
[A]
thermal stresses
[B]
tensile stress
[C]
bending
[D]
no stress
(25)
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
Answer: tensile strain increases more quickly
(26)
The stress necessary to initiate yielding is
[A]
considerably greater than that necessary to continue it
[B]
considerably lesser than that necessary to continue it
[C]
greater than that necessary to stop it
[D]
lesser than that necessary to stop it
Answer: considerably greater than that necessary to continue it
(27)
The stress developed in a material at breaking point in extension is called
[A]
breaking stress
[B]
fracture stress
[C]
yield point stress
[D]
ultimate tensile stress
(28)
Rupture stress is
[A]
breaking stress
[B]
maximum load/original cross-sectional area
[C]
load at breaking point/A
[D]
load at breaking point/neck area
Answer: load at breaking point/neck area
(29)
In a belt drive, the pulley diameter is doubled, the belt tension and pulley width remaining same. The changes required in key will be
[A]
increase key length
[B]
increase key depth
[C]
increase key width
[D]
double all the dimensions
Answer: increase key width
(30)
A key is subjected to side pressure as well at shearing forces. These pressures are called
[A]
bearing stresses
[B]
fatigue stresses
[C]
crushing stresses
[D]
resultant stresses
31
The value of shear stress which is induced in the shaft due to the applied couple varies
[A]
from maximum at the center to zero at the circumference
[B]
from zero at the center to maximum at the circumference
[C]
from maximum at the center to mini-mum at the cricumference
[D]
from minimum at the centro to maxi-mum at the circumference
Answer: from zero at the center to maximum at the circumference
32
The torsional rigidity of a shaft is expressed by the
[A]
maximum torque it can transmit
[B]
number of cycles it undergoes before failure
[C]
elastic limit up to which it resists torsion, shear and bending stresses
[D]
torque required to produce a twist of one radian per unit length of shaft
Answer: torque required to produce a twist of one radian per unit length of shaft
33
The safe twisting moment for a compound shaft is equal to the
[A]
maximum calculated value
[B]
minimum calculated value
[C]
mean value
[D]
None of the above
Answer: minimum calculated value
34
A boiler shell 200 cm diameter and plate thickness 1.5 cm is subjected to internal pressure of 1.5 MN/m , then the hoop stress will be
[A]
30 MN/m2
[B]
50 MN/m2
[C]
100 MN/m2
[D]
200 MN/m2
35
The force acting along the circumference will cause stress in the walls in a direction normal to the longitudinal axis of cylinder; this stress is called
[A]
longitudinal stress
[B]
hoop stress
[C]
yeiled stress
[D]
None of the above
36
A riveted joint in which every rivet of a row is opposite to other rivet of the outer row, is known as
[A]
chain riveted joint
[B]
diamond riveted joint
[C]
criss-cross riveted joint
[D]
zig-zag riveted joint
Answer: chain riveted joint
37
A riveted joint in which the number otrivets decrease from innermost to outer most row is called
[A]
chain riveted joint
[B]
diamond riveted joint
[C]
criss-cross riveted joint
[D]
zig-zag riveted joint
Answer: diamond riveted joint
38
If the rivets in adjacent rows are staggered and the outermost row has only one rivet, the arrangement of the rivets is called
[A]
chain riveting
[B]
zig zag riveting
[C]
diamond riveting
[D]
criss-cross riveting
39
Diamond riveted joint can be adopted in the case of following type of joint
[A]
butt joint
[B]
lap joint
[C]
double riveted lap joints
[D]
None of these
40
The weakest section of a diamond riveting is the section which passes through
[A]
the first row
[B]
the second row
[C]
the central row
[D]
one rivet hole of the end row
Answer: one rivet hole of the end row
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