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Civil Engineering Objective Questions { Theory Of Structures }



92. The equation of a parabolic arch of span 1 and rise h, is given by
A. y = h -72 X (1 - x) '
B. y = ?2hx (1 - x)
C. y = 3h P x(1 - x)
D. y = ?41zx (1 - x). /2

93. A three hinged arch is generally hinged at its supports
A. at one quarter span
B. at the crown
C. any where in the rib
D. none of these.

94. For determining the support reactions at A and B of a three hinged arch, points B and C are 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
A.300
B.450
C.600
D.900

95.  If a three hinged parabolic arch, (span 1, rise h) is carrying a uniformly distributed load w/unit length over the entire span,
A. horizontal thrust is w12/8h
B. S.F. will be zero throughout
C. B.M. will be zero throughout
D. all the above.

96. Pick up the correct statement from the following :
A. Hoop strain of the walls of a cylinder due to liquid is
B. Longitudinal strain in the walls of a cylinder due to
C. Volumetric change in the cylinder due to liquid is Pd
D. All the above.

97.  Pick up the correct statement from the following :
A. The point of intersection of the bending axis with the cross section of the beam, is called shear centre
B. For I sections, the shear centre coincides with the centroid of the cross section of the beam
C. For channels, the shear centre does not concide its centroid
D. All the above.

98.  Shear centre of a half circular section of radius r and of constant thickness, lies at a distance of x from the centre where x is
A. r
B. 2 r
C. 3 r
D. 4 r .

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