Strength of Materials Multiple choice Questions and Answers pdf free download

31. Maximum bending moment in a beam occurs where
a)    deflection is zero
b)    shear force is maximum
c)    shear force is minimum
d)    shear force changes sign
Ans: d

32. Rate of change of bending moment is equal to
a)    shear force
b)    deflection
c)    slope
d)    rate of loading
Ans: d

33.    The diagram showing the variation of axial load along the span is called
a)    shear force diagram
b)    bending moment diagram
c)    thrust diagram
d)    influence line diagram
Ans: a

34.    The difference in ordinate of the shear curve between any two sections is equal to the area under
a)    load curve between these two sections
b)    shear curve between these two sections
c)    bending moment curve between these two sections
d)    load curve between these two sections plus concentrated loads applied between the sections
Ans: d

35.    The variation of the bending moment in the portion of a beam carrying linearly varying load is
a)    linear
b)    parabolic
c)    cubic
d)    constant
Ans: c

36.    The maximum bending moment due to a moving load on a fixed ended beam occurs
a)    at a support
b)    always at the midspan
c)    under the load only
d)    none of the above
Ans: a

37.    A cantilever beam AB of length 1 carries a concentrated load W at its midspan C. If the free end B is supported on a rigid prop, then there is a point of contraflexure
a)    between A and C
b)    between C and B
c)    one between A and C and other between C and B
d)    nowhere in the beam
Ans: a

38.    A prismatic beam fixed at both ends carries a uniformly distributed load. The ratio of bending moment at the supports to the bending moment at mid-span is
a)    0.5
b)    1.0
c)    1.5
d)    2.0
Ans: d

39.    A beam of overall length 1 with equal overhangs on both sides carries a uniformly distributed load over the entire length. To have numerically equal bending moments at centre of the beam and at supports, the distance between the supports should be
a)    0.2771
b)    0.403 1
c)    0.5861
d)    0.7071
Ans: c

40.    A prismatic beam of length 1 and fixed at both ends carries a uniformly distributed load. The distance of points of contraflexure from either end is
a)    0.2071
b)    0.2111
c)    0.2771
d)    0.251
Ans: b

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