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Mechanical Engineering
Strength Of Materials In ME
Quiz 6
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Q.1
The product of Young's modulus (E) and moment of inertia (I) is known as
Modulus of rigidity
Bulk modulus
Flexural rigidity
Torsional rigidity
Q.2
When a body is subjected to direct tensile stresses (σx and σy) in two mutually perpendicular directions, accompanied by a simple shear stress τxy, then in Mohr's circle method, the circle radius is taken as
[(σx - σy)/2] + τ
[(σx + σy)/2] + τ
(1/2) × √[(σx - σy)² + 4τ²xy]
(1/2) × √[(σx + σy)² + 4τ²xy]
Q.3
The maximum shear stress developed in a beam of rectangular section is __________ the average shear stress.
Equal to
4/3 times
1.5 times
Twice
Q.4
When a load on the free end of a cantilever beam is increased, failure will occur
At the free end
At the fixed end
In the middle of the beam
At a distance 2l/3 from free end
Q.5
A beam is loaded as cantilever. If the load at the end is increased, the failure will occur
In the middle
At the tip below the load
At the support
Anywhere
Q.6
The steel bars in a reinforced cement concrete beam are embedded __________ of the beam.
In the center
Near the bottom
Near the top
At any position
Q.7
The rivets are used for _________ fastenings.
Permanent
Temporary
Semi-permanent
None of these
Q.8
The tensile test is carried on __________ materials.
Ductile
Brittle
Malleable
Plastic
Q.9
The compression test is carried on __________ materials.
Ductile
Brittle
Malleable
Plastic
Q.10
A welded joint as compared to a riveted joint has __________ strength.
Same
Less
More
None of these
Q.11
If a part is constrained to move and heated, it will develop
Principal stress
Tensile stress
Compressive stress
Shear stress
Q.12
The bending stress in abeam is __________ bending moment.
Equal to
Less than
More than
Directly proportional to
Q.13
For long columns, the value of buckling load is __________ crushing load.
Equal to
Less than
More than
None of these
Q.14
Longitudinal stress in a thin cylinder is
Equal to the hoop stress
Twice the hoop stress
Half of the hoop stress
One fourth of hoop stress
Q.15
Two closely coiled helical springs 'A' and 'B' are equal in all respects but the number of turns of spring 'A' is half that of spring 'B' The ratio of deflections in spring 'A' to spring 'B' is
1/8
1/4
1/2
2
Q.16
In case of eccentrically loaded struts __________ is preferred.
Solid section
Hollow section
Composite section
Reinforced section
Q.17
Rivets are made of following type of material
Tough
Hard
Resilient
Ductile
Q.18
The breaking stress is __________ the ultimate stress.
Equal to
Less than
Greater than
None of these
Q.19
The shear stress at the center of a circular shaft under torsion is
Zero
Minimum
Maximum
Infinity
Q.20
The ratio of change in volume to the original volume is called
Linear strain
Lateral strain
Volumetric strain
Poisson's ratio
Q.21
In order to know whether a column is long or short, we must know its
Ultimate shear stress of the column
Factor of safety
Torque resisting capacity
Slenderness ratio
Q.22
The shear force and bending moment are zero at the free end of a cantilever beam, if it carries a
Point load at the free end
Point load at the middle of its length
Uniformly distributed load over the whole length
None of the above
Q.23
When a bar is cooled to -5°C, it will develop
No stress
Shear stress
Tensile stress
Compressive stress
Q.24
The state of stress at a point in a loaded member is shown in the below figure. The magnitude of maximum shear stress is
10 MPa
30 MPa
50 MPa
100 MPa
Q.25
A simply supported beam with a gradually varying load from zero at ‘B’ and ‘w’ per unit length at ‘A’ is shown in the below figure. The shear force at ‘B’ is equal to
wl/6
wl/3
wl
2wl/3
Q.26
The layer at the center of gravity of the beam as shown in the below figure, will be
In tension
In compression
Neither in tension nor in compression
None of these
Q.27
The longitudinal stress in a riveted cylindrical shell of diameter (d), thickness (t) and subjected to an internal pressure (p) is
Q.28
The maximum shear stress in a thin cylindrical shell subjected to internal pressure 'p' is
pd/t
pd/2t
pd/4t
pd/8t
Q.29
The Rankine's formula holds good for
Short columns
Long columns
Both short and long columns
Weak columns
Q.30
Euler's formula holds good only for
Short columns
Long columns
Both short and long columns
Weak columns
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