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Mechanical Engineering
Strength Of Materials In ME
Quiz 8
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Q.1
The bending moment at a point on a beam is the algebraic ________ of all the moments on either side of the point.
Sum
Difference
Multiplication
None of the above
Q.2
The shear force at a point on a beam is the algebraic __________ of all the forces on either side of the point.
Sum
Difference
Multiplication
Division
Q.3
In spring balances, the spring is used
To apply forces
To measure forces
To absorb shocks
To store strain energy
Q.4
The design of thin cylindrical shells is based on
Hoop stress
Longitudinal stress
Arithmetic mean of the hoop and the longitudinal stress
Geometric mean of the hoop and longitudinal stress
Q.5
A shaft of diameter D is subjected to a twisting moment (T) and a bending moment (M). If the maximum bending stress is equal to maximum shear stress developed, then M is equal to
T/2
T
2T
4T
Q.6
In the above question, the normal stress on an oblique section will be maximum, when θ is equal to
0°
30°
45°
90°
Q.7
A column is said to be a short column, when
Its length is very small
Its cross-sectional area is small
The ratio of its length to the least radius of gyration is less than 80
The ratio of its length to the least radius of gyration is more than 80
Q.8
The shear force diagram for 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 a
Horizontal straight line
Vertical straight line
Inclined line
Parabolic curve
Q.9
In a thin cylindrical shell subjected to an internal pressure p, the ratio of longitudinal stress to the hoop stress is
1/2
3/4
1
1.5
Q.10
The property of a material by virtue of which a body returns to its original, shape after removal of the load is called
Plasticity
Elasticity
Ductility
Malleability
Q.11
The hoop stress in a riveted cylindrical shell of diameter (d), thickness (t) and subjected to an internal pressure (p) is (where η = Efficiency of the riveted joint)
pd/η × t
pd/η × 2t
pd/η × 4t
pd/η × 8t
Q.12
The neutral axis of a transverse section of a beam passes through the centre of gravity of the section and is
In the vertical plane
In the horizontal plane
In the same plane in which the beam bends
At right angle to the plane in which the beam bends
Q.13
In the below figure, the stress corresponding to point ‘D’ is
Yield point stress
Breaking stress
Ultimate stress
Elastic limit
Q.14
The product of the tangential force acting on the shaft and its distance from the axis of the shaft (i.e. radius of shaft) is known as
Bending moment
Twisting moment
Torsional rigidity
Flexural rigidity
Q.15
Two shafts 'A' and 'B' have the same material. The shaft 'A' is solid of diameter 100 mm. The shaft 'B' is hollow with outer diameter 100 mm and inner diameter 50 mm. The torque transmitted by shaft 'B' is __________ as that of shaft 'A'.
1/6
1/8
1/4
15/16
Q.16
Two closely coiled helical springs 'A' and 'B' are equal in all respects but the diameter of wire of spring 'A' is double that of spring 'B' The stiffness of spring 'B' will be __________ that of spring 'A'
One-sixteenth
One-eighth
One-fourth
One-half
Q.17
When a column is subjected to an eccentric load, the stress induced in the column will be
Direct stress only
Bending stress only
Shear stress only
Direct and bending stress both
Q.18
A beam encastered at both the ends is called
Simply supported beam
Fixed beam
Cantilever beam
Continuous beam
Q.19
The deformation of the bar per unit length in the direction of the force is known as
Linear strain
Lateral strain
Volumetric strain
Shear strain
Q.20
Deformation per unit length in the direction of force is known as
Strain
Lateral strain
Linear strain
Linear stress
Q.21
According to Euler's column theory, the crippling load for a column of length (l) fixed at both ends is __________ the crippling load for a similar column hinged at both ends.
Equal to
Two times
Four times
Eight times
Q.22
When a thin cylindrical shell is subjected to an internal pressure, the volumetric strain is (where ε₁ = Hoop strain, and ε₂ = Longitudinal strain)
2ε₁ - ε₂
2ε₁ + ε₂
2ε₂ - ε₁
2ε₂ + ε₁
Q.23
A beam of uniform strength has
Same cross-section throughout the beam
Same bending stress at every section
Same bending moment at every section
Same shear stress at every section
Q.24
If a material expands freely due to heating it will develop
Thermal stresses
Tensile stress
Bending
No stress
Q.25
According to Euler's column theory, the crippling load of a column is given by p = π² EI/Cl² In this equation, the value of ‘C’ for a column with both ends hinged, is
¼
½
1
2
Q.26
Tensile strength of a material is obtained by dividing the maximum load during the test by the
Area at the time of fracture
Original cross-sectional area
Average of A and B
Minimum area after fracture
Q.27
A double strap butt joint with equal straps is
Always in single shear
Always in double shear
Either in single shear or double shear
None of these
Q.28
The limit of eccentricity for no tensile conditions for a column of circular section of diameter (d) is
d/4
d/8
d/12
d/16
Q.29
The thickness of a thin cylindrical shell with hemispherical ends is _________ that of spherical ends.
Equal to
More than
Less than
None of these
Q.30
In a thick cylindrical shell subjected to an internal pressure (p), the radial stress across the thickness of the cylinder is
Maximum at the outer surface and minimum at the inner surface
Maximum at the inner surface and minimum at the outer surface
Maximum at the outer surface and zero at the inner surface
Maximum at the inner surface arid zero at the outer surface
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