A rectangular beam of length I supported at its two ends carries a central concentrated load W at its centre. The maximum deflection occurs
If the depth is kept constant for beam of uniform strength then its width will vary proportional to
When a beam deflects into a uniform strength then its width will vary proportional to
The longitudinal stress in a thin cylindrical shell is
The ratio of maximum shear stress and average shear stress for a rectangular section is
A fixed beam of span L carries a central point load W. The maximum sagging bending moment in the beam is
Air entrainment in the concrete increases
The relation between modulus of rupture Fcr and characteristic strength of concrete Fck is given by
The compressive strength of 100 mm cube as compared to 150 mm cube is always
For a slab supported on its four edges with corners held down and loaded uniformly, the Marcus correction factor to the moments obtained by Grashoff Rankine's theory