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Mechanical Engineering
Strength Of Materials In ME
Quiz 4
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Q.1
The value of Poisson's ratio for cast iron is
0.1 to 0.2
0.23 to 0.27
0.25 to 0.33
0.4 to 0.6
Q.2
The capacity of a strained body for doing work on the removal of the straining force, is called
Strain energy
Resilience
Proof resilience
Impact energy
Q.3
Hook's law holds good up to
Plastic limit
Yield point
Elastic limit
Breaking point
Q.4
Hooke's law holds good up to
Yield point
Limit of proportionality
Breaking point
Elastic limit
Q.5
Compression members always tend to buckle in the direction of the
Axis of load
Perpendicular to the axis of load
Minimum cross section
Least radius of gyration
Q.6
A vertical column has two moments of inertia (i.e. Ixx and Iyy ). The column will tend to buckle in the direction of the
Axis of load
Perpendicular to the axis of load
Maximum moment of inertia
Minimum moment of inertia
Q.7
The torsional rigidity of a shaft is expressed by the
Maximum torque it can transmit
Number of cycles it undergoes before failure
Elastic limit up to which it resists torsion, shear and bending stresses
Torque required to produce a twist of one radian per unit length of shaft
Q.8
The section modulus (Z) of a beam is given by
I/y
I.y
y/I
M/I
Q.9
The maximum strain energy that can be stored in a body is known as
Impact energy
Resilience
Proof resilience
Modulus of resilience
Q.10
The extremities of any diameter on Mohr's circle represent
Principal stresses
Normal stresses on planes at 45°
Shear stresses on planes at 45°
Normal and shear stresses on a plane
Q.11
A coil is cut into two halves, the stiffness of cut coil will be
Double
Half
Same
None of these
Q.12
Transverse fillet welds are designed for
Tensile strength
Compressive strength
Shear strength
Bending strength
Q.13
According to Euler's column theory, the crippling load for a column length (l) hinged at both ends, is
π²EI/l²
π²EI/4l²
4π²EI/l²
2π²EI/l²
Q.14
When a rectangular beam is loaded transversely, the maximum tensile stress is developed on the
Top layer
Bottom layer
Neutral axis
Every cross-section
Q.15
The shear force of a cantilever beam of length l carrying a uniformly distributed load of w per unit length is _________ at the free end.
Zero
wl/4
wl/2
wl
Q.16
The bending moment of a cantilever beam of length l and carrying a uniformly distributed load of w per unit length is __________ at the free end.
Zero
wl/4
wl/2
wl
Q.17
If percentage reduction in area of a certain specimen made of material 'A' under tensile test is 60% and the percentage reduction in area of a specimen with same dimensions made of material 'B' is 40%, then
The material A is more ductile than material B
The material B is more ductile than material A
The ductility of material A and B is equal
The material A is brittle and material B is ductile
Q.18
The shear force at the center of a simply supported beam with a gradually varying load from zero at both ends to w per meter at the center, is
Zero
wl/4
wl/2
wl²/2
Q.19
The bending moment of a cantilever beam of length l and carrying a gradually varying load from zero at free end and w per unit length at the fixed end is ________ at the fixed end.
wl/2
wl
wl²/2
wl²/6
Q.20
When a bar of length l, width b and thickness t is subjected to a push of P, its
Length, width and thickness increases
Length, width and thickness decreases
Length increases, width and thickness decreases
Length decreases, width and thickness increases
Q.21
The center to center distance, between two consecutive rivets in a row, is called
Margin
Pitch
Back pitch
Diagonal pitch
Q.22
The shear force of a cantilever beam of length l and carrying a gradually varying load from zero at the free end and w per unit length at the fixed end is _________ at the fixed end.
Zero
wl/4
wl/2
wl
Q.23
The shear force of a cantilever beam of length l carrying a uniformly distributed load of w per unit length is __________ at the fixed end.
Zero
wl/4
wl/2
wl
Q.24
According to Unwin's formula, the relation between diameter of rivet hole (d) and thickness of plate (t) is given by (where d and t are in mm)
d = t
d = 1.6 t
d = 2t
d = 6t
Q.25
The bending moment of a cantilever beam of length ‘l’ and carrying a uniformly distributed load of ‘w’ per unit length is __________ at the fixed end.
wl/4
wl/2
wl
wl²/2
Q.26
When it is indicated that a member is elastic, it means that when force is applied, it will
Not deform
Be safest
Stretch
Not stretch
Q.27
In riveted boiler joints, all stresses, shearing, bearing and tensile are based on the
Size of rivet
Size of the drilled or reamed hole
Average of size of rivet and hole
Smaller of the two
Q.28
A lap joint is always in _________ shear.
Single
Double
Both A and B
None of these
Q.29
A pressure vessel is said to be a thin shell when the ratio of wall thickness of the vessel to its diameter is __________ 1/10.
Equal to
Less than
Greater than
None of these
Q.30
Which of the following statement is wrong?
The deformation of the bar per unit length in the direction of the force is called linear strain.
The Poisson's ratio is the ratio of lateral strain to the linear strain.
The ratio of change in volume to the original volume is called volumetric strain.
The bulk modulus is the ratio of linear stress to the linear strain.
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