Stress and Strain Quiz | Stress and Strain Objective Type Questions and Answers

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Questions
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

Answer: malleability
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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

Answer: negligible
24 If a material expands freely due to heating it will develop
A thermal stresses
B tensile stress
C bending
D no stress

Answer: 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

Answer: breaking 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

Answer: bearing 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

Answer: 100 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

Answer: hoop stress
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

Answer: diamond 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

Answer: butt joint
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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