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Mechanical Engineering
Strength Of Materials In ME
Quiz 7
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Q.1
The stress induced in a body due to suddenly applied load compared to when it is applied gradually is
Same
Half
Two times
Four times
Q.2
The load at which the column just buckles, is known as
Buckling load
Critical load
Crippling load
Any one of these
Q.3
A thin mild steel wire is loaded by adding loads in equal increments till it breaks. The extensions noted with increasing loads will behave as under
Uniform throughout
Increase uniformly
First increase and then decrease
Increase uniformly first and then increase rapidly
Q.4
A body is subjected to a direct tensile stress (σ) in one plane. The shear stress is maximum at a section inclined at __________ to the normal of the section.
45° and 90°
45° and 135°
60° and 150°
30° and 135°
Q.5
When a body is subjected to a direct tensile stress (σ) in one plane, then maximum normal stress occurs at a section inclined at _________ to the normal of the section.
0°
30°
45°
90°
Q.6
The maximum deflection of a fixed beam of length l carrying a central point load W is
wl³/48 EI
wl³/96 EI
wl³/192 EI
wl³/384 EI
Q.7
The maximum bending moment for the beam shown in the below figure, lies at a distance of ________ from the end B.
l/2
l/3
l/√2
l/√3
Q.8
When two plates are butt together and riveted with cover plates with two rows of rivets, the joint is known as
Lap joint
Butt joint
Single riveted single cover butt joint
Double riveted double cover butt joint
Q.9
A cylindrical section having no joint is known as
Joint less section
Homogeneous section
Perfect section
Seamless section
Q.10
When one plate overlaps the other and the two plates are riveted together with two rows of rivets, the joint is known as
Single riveted lap joint
Double riveted lap joint
Double riveted single cover butt joint
Double riveted double cover butt joint
Q.11
The distance between the centers of the rivets in adjacent rows of zigzag riveted joint is known as
Pitch
Back pitch
Diagonal pitch
Diametric pitch
Q.12
A riveted joint may fail by
Tearing of the plate at an edge
Tearing of the plate across a row of rivets
Shearing of rivets
Any one of these
Q.13
The ratio of shear modulus to the modulus of elasticity for a Poisson's ratio of 0.4 will be
5/7
7/5
5/14
14/5
Q.14
The maximum deflection of a cantilever beam of length ‘l’ with a uniformly distributed load of ‘w’ per unit length is (where W = wl)
Wl³/3EI
Wl³/8EI
Wl³/16EI
Wl³/48EI
Q.15
The shear force diagram of a cantilever beam of length ‘l’ and carrying a uniformly distributed load of w per unit length will be
A right angled triangle
An isosceles triangle
An equilateral triangle
A rectangle
Q.16
If the tearing efficiency of a riveted joint is 50%, then ratio of rivet hole diameter to the pitch of rivets is
0.20
0.30
0.50
0.60
Q.17
The maximum stress produced in a bar of tapering section is at
Smaller end
Larger end
Middle
Anywhere
Q.18
Diamond riveted joint can be adopted in the case of following type of joint
Butt joint
Lap joint
Double riveted lap joints
All types of joints
Q.19
In a riveted joint, when the number of rivets decreases from the inner most row to outer most row, the joint is said to be
Chain riveted
Zig-zag riveted
Diamond riveted
None of these
Q.20
In a riveted joint, when the rivets in the various rows are opposite to each other, the joint is said to be
Chain riveted
Zig-zag riveted
Diamond riveted
None of these
Q.21
The bending moment in the center of a simply supported beam carrying a uniformly distributed load of w per unit length is
Zero
wl²/2
wl²/4
wl²/8
Q.22
For the beam shown in the below figure, the shear force at A is equal to
wl/6
wl/3
wl
2wl/3
Q.23
The value of shear stress which is induced in the shaft due to the applied couple varies
From maximum at the center to zero at the circumference
From zero at the center to maximum at the circumference
From maximum at the center to minimum at the circumference
From minimum at the center to maximum at the circumference
Q.24
The deformation of a bar under its own weight is _________ the deformation, if the same body is subjected to a direct load equal to weight of the body.
Equal to
Half
Double
Quadruple
Q.25
The stress at which extension of the material takes place more quickly as compared to the increase in load is called
Elastic point of the material
Plastic point of the material
Breaking point of the material
Yielding point of the material
Q.26
The hoop stress in a thin cylindrical shell is
Longitudinal stress
Compressive stress
Radial stress
Circumferential tensile stress
Q.27
The maximum tangential stress in a thick cylindrical shell is always _________ the internal pressure acting on the shell.
Equal to
Less than
Greater than
None of these
Q.28
The deformation of a bar under its own weight compared to the deformation of same body subjected to a direct load equal to weight of the body is
Same
Double
Half
Four times
Q.29
For riveting, the size of hole drilled in plates is __________ shank diameter of rivet.
Equal to
Less than
Greater than
None of these
Q.30
A hollow shaft of same cross-section area as compared to a solid shaft transmit
Same torque
Less torque
More torque
Unpredictable
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