Civil Engineering MCQs

Page No. 118

When a series of wheel loads crosses a simply supported girder, the maximum bending moment under any given wheel load occurs when________________?


athe centre of gravity of the load system is midway between the centre of span and wheel load under consi-deration


b the centre of span is midway between the centre of gravity of the load system and the wheel load under consideration


cthe wheel load under consideration is midway between the centre of span and the centre of gravity of the load system


dnone of the above



When a uniformly distributed load, longer than the span of the girder, moves from left to right, then the maximum bending moment at mid section of span occurs when the uniformly distributed load occupies_______________?


aless than the left half span


b whole of left half span


cmore than the left half span


dwhole span


View Answer whole span

A single rolling load of 8 kN rolls along a girder of 15 m span. The absolute maximum bending moment will be________________?


a8 kN.m


b15 kN.m


c30 kN.m


d60 kN.m


View Answer 30 kN.m

For a two-hinged arch, if one of the supports settles down vertically, then the horizontal thrust______________?


ais increased


bis decreased


c remains unchanged


d becomes zero


View Answer remains unchanged

The Castigliano’s second theorem can be used to compute deflections________________?


a in statically determinate structures only


bfor any type of structure


cat the point under the load only


d for beams and frames only



The three moments equation is applicable only when___________________?


a the beam is prismatic


bthere is no settlement of supports


c there is no discontinuity such as hinges within the span


d the spans are equal



The deflection at any point of a perfect frame can be obtained by applying a unit load at the joint in_________________?


a vertical direction


bhorizontal direction


cinclined direction


dthe direction in which the deflection is required



In column analogy method, the area of an analogous column for a fixed beam of span L and flexural rigidity El is taken as__________________?


a L/EI


b L/2EI


cL/3EI


dL/4EI


View Answer L/EI

In moment distribution method, the sum of distribution factors of all the members meeting at any joint is always__________________?


azero


b less than 1


c 1


dgreater than 1


View Answer 1

Castigliano’s first theorem is applicable_______________?


a for statically determinate structures only


bwhen the system behaves elastically


conly when principle of superposition is valid


dnone of the above



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