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

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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

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dnone of the above

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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

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b whole of left half span

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cmore than the left half span

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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

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b15 kN.m

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c30 kN.m

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d60 kN.m

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View Answer 30 kN.m

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


ais increased

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bis decreased

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c remains unchanged

✓


d becomes zero

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View Answer remains unchanged

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


a in statically determinate structures only

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bfor any type of structure

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cat the point under the load only

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d for beams and frames only

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The three moments equation is applicable only when___________________?


a the beam is prismatic

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bthere is no settlement of supports

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c there is no discontinuity such as hinges within the span

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d the spans are equal

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


a vertical direction

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bhorizontal direction

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cinclined direction

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dthe direction in which the deflection is required

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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

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b L/2EI

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cL/3EI

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dL/4EI

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View Answer L/EI

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


azero

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b less than 1

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c 1

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dgreater than 1

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View Answer 1

Castigliano’s first theorem is applicable_______________?


a for statically determinate structures only

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bwhen the system behaves elastically

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conly when principle of superposition is valid

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dnone of the above

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