Civil Engineering MCQs

Page No. 201

For determining the support reactions at A and B of a three hinged arch, points B and Care joined and produced to intersect the load line at D and a line parallel to the load line through A at D’. Distances AD, DD’ and AD’ when measured were 4 cm, 3 cm and 5 cm respectively. The angle between the reactions at A and B is___________________?


a30°


b45°


c60°


d90°


View Answer 90°

y/n) (1 – a l/r), is For calculating the allowable stress of long columns. The empirical formula 0 known as_________________?


a Straight line formula


bParabolic formula


cPerry’s formula


dRankine’s formula



d constant, the width of a cantilever of length l of uniform strength loaded with Keeping the depth a uniformly distributed load w varies from zero at the free end and________________?


a (2w/ × l² at the fixed end


b (3w/ × l² at the fixed end


c(3w/ × l² at the fixed end


d (5w/ × l² at the fixed end



The point of contraflexure is the point where_______________?


aB.M. changes sign


bB.M. is maximum


cB.M. is minimum


d S.F. is zero


View Answer B.M. changes sign

In the truss, the force in the member AC is_______________?


a 6.25 t compressive


b8.75 t tensile


c t tensile


dt compressive


View Answer t compressive

The general expression for the B.M. of a beam of length l is the beam carries M = (wl/2) x – (wx²/2)_______________?


aA uniformly distributed load w/unit length


bA load varying linearly from zero at one end to w at the other end


cAn isolated load at mid span


dNone of these



A steel plate d × b is sandwiched rigidly between two timber joists each D × B/2 in section. The steel will be (where Young’s modulus of steel is m times that of the timber)_________________?


aBD² + mbd²)/6D]


bBD3 + mbd3)/6D]


cBD² + mbd3)/4D]


dBD² + mbd²)/4D]


View Answer BD3 + mbd3)/6D]

The locus of the moment of inertia about inclined axes to the principal axis, is______________?


aStraight line


bParabola


cCircle


dEllipse


View Answer Ellipse

Y are the bending moment, moment of inertia, radius of curvature, modulus of If M, I, R, E, F, and elasticity stress and the depth of the neutral axis at section, then________________?


aM/I = R/E = F/Y


b I/M = R/E = F/Y


c M/I = E/R = E/Y


dM/I = E/R = Y/F


View Answer M/I = E/R = E/Y

Pick up the correct statement from the following?


aFor channels, the shear centre does not coincide its centroid


bThe point of intersection of the bending axis with the cross section of the beam, is called shear centre


cFor I sections, the shear centre coincides with the centroid of the cross section of the beam


dAll the above


View Answer All the above

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