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Mechanical Engineering
Strength Of Materials In ME
Quiz 1
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Q.1
A cube subjected to three mutually perpendicular stress of equal intensity p expenses a volumetric strain
3p/ E × (2/m - 1)
3p/ E × (2 - m)
3p/ E × (1 - 2/m)
E/ 3p × (2/m - 1)
Q.2
A beam of T-section is subjected to a shear force of F. The maximum shear force will occur at the
Top of the section
Bottom of the section
Neutral axis of the section
Junction of web and flange
Q.3
Which of the following has no unit?
Kinematic viscosity
Surface tension
Bulk modulus
Strain
Q.4
The length of a conical bar is l, diameter of base is d and weight per unit volume is w. It is fixes at its upper end and hanging freely. The elongation of the bar under the action of its own weight will be
wl²/2E
wl²/4E
wl²/6E
wl²/8E
Q.5
A beam supported on more than two supports is called
Simply supported beam
Fixed beam
Overhanging beam
Continuous beam
Q.6
A beam extending beyond the supports is called
Simply supported beam
Fixed beam
Overhanging beam
Cantilever beam
Q.7
When a rectangular bar of length l, breadth b and thickness t is subjected to an axial pull of P, then linear strain (ε) is given by (where E = Modulus of elasticity)
ε = P/b.t.E
ε = b.t.E/P
ε = b.t/P.E
ε = P.E/b.t
Q.8
The shape of cantilever for uniformly distributed load will be
Straight line
Parabolic
Elliptical
Cubic
Q.9
A column with maximum equivalent length has
Both ends hinged
Both ends fixed
One end fixed and the other end hinged
One end fixed and the other end free
Q.10
In a prismatic member made of two materials so joined that they deform equally under axial stress, the unit stresses in two materials are
Equal
Proportional to their respective moduli of elasticity
Inversely proportional to their moduli of elasticity
Average of the sum of moduli of elasticity
Q.11
In compression test, the fracture in cast iron specimen would occur along
The axis of load
An oblique plane
At right angles to the axis of specimen
Would not occur
Q.12
A closely coiled helical spring is of mean diameter (D) and spring wire diameter (d). The spring index is the ratio of
1/d
1/D
D/d
d/D
Q.13
When a body is subjected to a direct tensile stress (σ) in one plane, the maximum shear stress is __________ the maximum normal stress.
Equal to
One-half
Two-third
Twice
Q.14
The unit of strain is
N-mm
N/mm
mm
No unit
Q.15
A fixed beam is one which is fixed at _________.
One of its ends
Both of its ends
The middle
None of these
Q.16
For a shaft, the shear stress at a point is __________ the distance from the axis of the shaft.
Equal to
Directly proportional to
Inversely proportional to
None of these
Q.17
The relation between modulus of elasticity (E) and modulus of rigidity (C) is given by
C = m.E/2 (m + 1)
C = 2(m + 1)/m.E
C = 2m.E/(m + 1)
C = (m + 1)/2m.E
Q.18
A leaf spring is supported at the
Ends and loaded at the center
Center and loaded at the ends
Ends and loaded anywhere
Center and loaded anywhere
Q.19
The object of caulking in a riveted joint is to make the joint
Free from corrosion
Stronger in tension
Free from stresses
Leak proof
Q.20
Which of the following is the correct torsion equation?
M/I = σ/y = E/R
T/J = τ/R = Cθ/l
M/R = T/J = Cθ/l
T/l= τ/J = R/Cθ
Q.21
Every direct stress is always accompanied by a strain in its own direction and an opposite kind of strain in every direction, at right angles to it. Such a strain is known as
Linear strain
Lateral strain
Volumetric strain
Shear strain
Q.22
When a change in length takes place, the strain is known as
Linear strain
Lateral strain
Volumetric strain
Shear strain
Q.23
When a body is subjected to three mutually perpendicular stresses, of equal intensity, the ratio of direct stress to the corresponding volumetric strain is known as
Young's modulus
Modulus of rigidity
Bulk modulus
Poisson's ratio
Q.24
In a stress-strain diagram as shown in the below figure, the curve ‘A’ represents
Mild steel
Soft brass
Low carbon steel
Cold rolled steel
Q.25
For the beam shown in the below figure, the shear force diagram between A and B is
A horizontal line
A vertical line
An inclined line
A parabolic curve
Q.26
For a beam, as shown in the below figure, when the load W is applied in the center of the beam, the maximum deflection is
Wl³ / 48EI
5Wl³ / 384EI
Wl³ / 392EI
Wl³ / 384EI
Q.27
When two shafts of same length, one of which is hollow, transmit equal torques and have equal maximum stress, then they should have equal
Polar moment of inertia
Polar modulus
Diameter
Angle of twist
Q.28
The ratio of direct stress to volumetric strain in case of a body subjected to three mutually perpendicular stresses of equal intensity, is equal to
Young's modulus
Bulk modulus
Modulus of rigidity
Modulus of elasticity
Q.29
Flow stress corresponds to
Fluids in motion
Breaking point
Plastic deformation of solids
Rupture stress
Q.30
Which is the false statement about true stress strain method?
It does not exist
It is more sensitive to changes in both metallurgical and mechanical conditions
It gives a more accurate picture of the ductility
It can be correlated with stress strain values in other tests like torsion, impact, combined stress tests etc.
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