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

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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.

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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

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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.

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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.

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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.

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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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