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Mechanical Engineering
Strength Of Materials In ME
Quiz 10
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Q.1
The percentage reduction in area of a cast iron specimen during tensile test would be of the order of
More than 50%
25-50%
10-25%
Negligible
Q.2
A circular shaft fixed at, A has diameter D for half of its length and diameter D/2 over the other half, as shown in the below figure. If the rotation of B relative to A is 0.1 radian, the rotation of C relative to B will be
0.4 radian
0.8 radian
1.6 radian
3.2 radian
Q.3
In the below figure, the point E represents.
The maximum stress
The minimum stress
No stress
None of these
Q.4
The ductility of the material __________ with the decrease in percentage elongation of a specimen under tensile test.
Increases
Decreases
Remain same
None of these
Q.5
The total elongation produced in a bar of uniform section hanging vertically downwards due to its own weight is equal to that produced by a weight
Of same magnitude as that of bar and applied at the lower end
Half the weight of bar applied at lower end
Half of the square of weight of bar applied at lower end
One fourth of weight of bar applied at lower end
Q.6
If the modulus of elasticity for a given material is twice its modulus of rigidity, then bulk modulus is equal to
2C
3C
2C/3
3C/2
Q.7
A steel bar of 5 mm is heated from 25°C to 45°C and it is free to expand. The bar will induce
No stress
Shear stress
Tensile stress
Compressive stress
Q.8
Formula based on IS codes is based on
Straight line formula
Euler’s formula
Rankine’s formula
Secant formula
Q.9
The elasticity of various materials is controlled by its
Ultimate tensile stress
Proof stress
Stress at yield point
Stress at elastic limit
Q.10
When two main plates are kept in alignment butting each other and riveted with cover plate on both sides of the main plates with two rows of rivets in each main plate, the joint is known as ________ double cover butt joint.
Single riveted
Double riveted
Multi riveted
None of these
Q.11
The materials having same elastic properties in all directions are called
Ideal materials
Uniform materials
Isotropic materials
Piratical materials
Q.12
The materials which exhibit the same elastic properties in all directions are called
Homogeneous
Inelastic
Isotropic
Isentropic
Q.13
Strain is defined as the ratio of
Change in volume to original volume
Change in length to original length
Change in cross-sectional area to original cross-sectional area
Any one of the above
Q.14
Factor of safety is defined as the ratio of
Ultimate stress to working stress
Working stress to ultimate stress
Breaking stress to ultimate stress
Ultimate stress to breaking stress
Q.15
A fletched beam is used to
Change the shape of the beam
Effect the saving in material
Equalize the strength in tension and compression
Increase the cross-section of the beam
Q.16
A rectangular beam of length l supported at its two ends carries a central point load W. The maximum deflection occurs
At the ends
At l/3 from both ends
At the center
None of these
Q.17
The ductility of a material __________ with the increase in percentage reduction in area of a specimen under tensile test.
Increases
Decreases
Remains same
None of these
Q.18
A material capable of absorbing large amount of energy before fracture is known as
Ductility
Toughness
Resilience
Shock proof
Q.19
Young's modulus is defined as the ratio of
Volumetric stress and volumetric strain
Lateral stress and lateral strain
Longitudinal stress and longitudinal strain
Shear stress to shear strain
Q.20
Modulus of rigidity may be defined as the ratio of
Linear stress to lateral strain
Lateral strain to linear strain
Linear stress to linear strain
Shear stress to shear strain
Q.21
Young's modulus may be defined as the ratio of
Linear stress to lateral strain
Lateral strain to linear strain
Linear stress to linear strain
Shear stress to shear strain
Q.22
Poisson's ratio is defined as the ratio of
Longitudinal stress and longitudinal strain
Longitudinal stress and lateral stress
Lateral stress and longitudinal stress
Lateral stress and lateral strain
Q.23
The radius of the Mohr’s circle in the given figure is equal to
Sum of two principal stresses
Difference of two principal stresses
Half the sum of two principal stresses
Half the difference of two principal stresses
Q.24
A simply supported beam of length 'l' carries a point load 'W' at a point C as shown in the below figure. The maximum deflection lies at
Point A
Point B
Point C
Between points B and C
Q.25
In the below figure, curve D represents_________.
Mild steel
Cast iron
Concrete
Bone of these
Q.26
In the below figure, __________ represents glass.
Curve A
Curve B
Curve C
Curve D
Q.27
When a bar is subjected to a change of temperature and its deformation is prevented, the stress induced in the bar is
Tensile stress
Compressive stress
Shear stress
Thermal stress
Q.28
A bar of length ‘L’ meters extends by ‘l’ mm under a tensile force of ‘P’. The strain produced in the bar is
l/L
0.1 l/L
0.01 l/L
0.001 l/L
Q.29
The weakest section of a diamond riveting is the section which passes through
The first row
The second row
The central row
One rivet hole of the end row
Q.30
Strain is equal to (where l = Original length, and δl = Change in length)
l/δl
δl/l
l.δl
l + δl
0 h : 0 m : 1 s
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