Q.1
For steel, the ultimate strength in shear as compared to in tension is nearly
Q.2
A tensile test is performed on a mild steel round bar. Its diameter after fracture will
Q.3
The bending moment diagram for a simply supported beam carrying a uniformly distributed load of ‘w’ per unit length, will be
Q.4
Two shafts 'A' and 'B' are made of same material. The shaft 'A' is solid and has diameter D. The shaft 'B' is hollow with outer diameter D and inner diameter D/2. The strength of hollow shaft in torsion is _________ as that of solid shaft.
Q.5
The ratio of the largest load in a test to the original cross-sectional area of the test piece is called
Q.6
For a 25 mm hole drilled in plates, the diameter of rivet shank should be
Q.7
The given figure shows the Mohr's circle of stress for two unequal and like principal stresses (σx and σy) acting at a body across two mutually perpendicular planes. The resultant stress is given by
Strength of Materials mcq question image
Q.8
According to Euler's column theory, the crippling load of a column is given by p = π²EI/Cl². In the Euler's formula, the value of C for a column with one end fixed and the other end free, is
Q.9
A pressure vessel is said to be a thick shell, when
Q.10
The stress necessary to initiate yielding is
Q.11
A thin cylindrical shell of diameter (d), length (l) and thickness (t) is subjected to an internal pressure (p). The ratio of longitudinal strain to hoop strain is
Q.12
The strength of a riveted joint is equal to the
Q.13
The safe twisting moment for a compound shaft is equal to the
Q.14
Resilience of a material is considered when it is subjected to
Q.15
A section of beam is said to be in pure bending, if it is subjected to
Q.16
A key is subjected to side pressure as well at shearing forces. These pressures are called
Q.17
A riveted joint in which the number otrivets decrease from innermost to outer most rows is called
Q.18
The Poisson's ratio for steel varies from
Q.19
When a body is subjected to two equal and opposite pulls, as a result of which the body tends to extend its length, the stress and strain induced is
Q.20
When a body is subjected to two equal and opposite forces, acting tangentially across the resisting section, as a result of which the body tends to shear off across the section, the stress and strain induced is
Q.21
The ratio of maximum shear stress developed in a rectangular beam and a circular beam of the same cross-sectional area is
Q.22
The pull required to tear off the plate per pitch length is (where p = Pitch of rivets, t = Thickness of plates, and σt, τ and σc = Permissible tensile, shearing and crushing stresses respectively)
Q.23
The torsional rigidity of a shaft is given by
Q.24
When a shaft, is subjected to torsion, the shear stress induced in the shaft varies from
Q.25
A thin spherical shell of diameter (d) and thickness (t) is subjected to an internal pressure (p). The stress in the shell material is
Q.26
True stress strain-curve for materials is plotted between
Q.27
When the shear force diagram is a parabolic curve between two points, it indicates that there is a
Q.28
When there is a sudden increase or decrease in shear force diagram between any two points, it indicates that there is a
Q.29
A bolt is made to pass through a tube and both of them are tightly fitted with the help of washers and nuts. If the nut is tightened, then
Q.30
Modular ratio of the two materials is the ratio of
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