Strength of Material Sheet 13
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1) Question.
A simply supported beam with equal overhang on both sides is loaded as shown in Fig. 10.91.
If the bending moment at mid-span is zero, then the percentage overhang on each side will be
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2) Question.
Which one of the following represents the correct shear force diagram of the simply supported beam shown in Fig. 10.90
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3) Question.
Strain energy in a member is
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4) Question.
A cantilever is subjected to a uniformly distributed load over its whole length and a concentrated upward force at its free end. The deflection of the free end is
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5) Question.
A beam of rectangular section carries certain loads such that the Bending Moment at a section
is and at another section it is The distance between the sections
Answer.6) Question.A Cantilever beam of span and cross sectional area wide and deep is subjected to a concentrated
load of at the free end. Neglecting self-weight, the maximum bending stress at a section
Answer.7) Question.Consider the following statements:
When two planes at right angles are subjected to direct stresses, the axis which denotes shear stress, will pass through the centre of the Mohr's circle when the direct stresses are
1. equal in magnitude
2. unequal in magnitude, in the ratio of
3. of the same sign
4. of opposite signs
Of these statements:
Answer.8) Question.In a particular material, if the modulus of rigidity is equal to the bulk modulus, then the Poission's ratio will be
Answer.9) Question.A steel cable of 2 cm diameter is used to lift load of kg. Given that and the length of the cable is 10 m, the elongation of the cable due to the load will be
Answer.10) Question.Consider the following statements:
In a uni-diamensional stress system, the principal plane is defined as one on which the
1. shear stress is zero
2. normal stress is zero
3. shear stress is maximum
4. normal sterss is maximum
Of these statements
Answer.11) Question.For the design of a cast iron member, the most appropriate theory of failure is
Answer.12) Question.At a point in a steel member, the major principal stress is and the minor principal stress is compressive. If the uni-axial tensile yield stress is , then the magnitude of the minor principal stress at which yielding will commence, according to the maximum shearing stress theory, is
Answer.13) Question.For ductile materials, the most appropriatefailure theory is
Answer.14) Question.A three hinged parabolic arch rib is acted upon by a single load at the left quarter point. If the central rise is increased and the shape of arch altered to segmental without changing the other details, the horizontal thrust will
Answer.15) Question.The stress below whcih a material has a high probability of not failing under reversal of stress is known as
Answer.16) Question.The property of metal which allows it to deform continuously at slow rate without any further increase in stress is known as
Answer.17) Question.The phenomenon of decresed resistance of a material to reversal of stress is called
Answer.18) Question.Impact test enables one to estimate the property of
Answer.19) Question.The specimen in a Charpy impact test is supported as a
Answer.20) Question.If the depth of a beam of rectangular section is reduced to half, strain energy stored in the beam becomes
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