811. In order to prevent crushing of masonry at the base of the dam, the maximum stress should be __________ the permissible stress of the soil.
A. equal to
B. less than
C. more than

812. When a body is subjected to two equal and opposite pushes, as a result of which the body tends to reduce its length, the stress and strain induced is compressive.
A. True
B. False

813. The maximum diameter of the hole that can be punched from a plate of maximum shear stress 1/4th of its maximum crushing stress of punch, is equal to (where t = Thickness of the plate)
A. t
B. 2t
C. 4t
D. 8t

814. Two closely coiled helical springs ‘A’ and ‘B’ are equal in all respects but the number of turns of spring ‘A’ is half that of spring ‘B’ The ratio of deflections in spring ‘A’ to spring ‘B’ is
A. 1/8
B. 1/4
C. 1/2
D. 2

815. The deformation per unit length is called
A. tensile stress
B. compressive stress
C. shear stress
D. strain

816. Strain resetters are used to
A. measure shear strain
B. measure linear strain
C. measure volumetric strain
D. relieve strain

817. When a rectangular beam is loaded transversely, the maximum compressive stress is developed on the
A. top layer
B. bottom layer
C. neutral axis
D. every cross-section

818. The point of contraflexure is a point where
A. shear force changes sign
B. bending moment changes sign
C. shear force is maximum
D. bending moment is maximum

819. The simply supported beam ‘A’ of length l carries a central point load W. Another beam ‘B’ is loaded with a uniformly distributed load such that the total load on the beam is W. The ratio of maximum deflections between beams A and B is
A. 5/8
B. 8/5
C. 5/4
D. 4/5

820. The maximum stress produced in a bar of tapering section is at
A. smaller end
B. larger end
C. middle
D. anywhere

NOTE
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