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37.

For the design of retaining walls, the minimum factor of safety against overturning is taken as                        
A. 1.5 B. 2
C. 2.5 D. 3



38.

For walls, columns and vertical faces of all structural members, the form work is generally removed after                        
A. 24 to 48 hours B. 3 days
C. 7 days D. 14 days



39.

Half of the main steel in a simply supported slab is bent up near the support at a distance of x from the centre of slab bearing where x is equal to where 1 is the span                        
A. 3-Jan B. 5-Jan
C. 7-Jan D. 10-Jan




40.

High carbon content in the steel causes                        
A. decrease in tensile strength but increase in ductility B. increase in tensile strength but decrease in ductility
C. decrease in both tensile strength and ductility D. increase in both tensile strength and ductility



41.

If a beam fails in bond, then its bond strength can be increased most economi-cally by                        
A. increasing the depth of beam B. using thinner bars but more in number
C. using thicker bars but less in number D. providing vertical stirrups



42.

If nominal shear stress tv exceeds the design shear strength of concrete xc, the nominal shear reinforcement as per IS : 456-1978 shall be provided for carrying a shear stress equal to                        
A. xv B. xc
C. xv - TC D. Tv + Tc



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