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The modular ratio m of a concrete whose permissible compressive stress is C, may be obtained from the equation. A. m = 700/3C B. m = 1400/3CC. m = 2800/3C D. m = 3500/3C
If the permissible compressive and tensile stresses in a singly reinforced beam are 50 kg/cm2 and 1400 kg/cm2 respectively and the modular ratio is 18, the percentage area At of the steel required for an economic section, is__________________? A. 0.496 % B. 0.596 % C. 0.696 % D. 0.796 %
on a circular slab of radius , the maximum radial moment at the centre of the If is the load slab, is WR²/16_____________? A. 2WR²/16B. 3WR²/16 C. 5WR²/16 D> NON OF THESE
High strength concrete is used in pre-stressed member________________? A. To overcome high bearing stresses developed at the ends B. To overcome bursting stresses at the ends C. To provide high bond stressesD. All the above
In the zone of R.C.C. beam where shear stress is less than 5 kg/cm2, nominal reinforcement is provided at a pitch of________________? A. One -half lever arm of the section B. One-third lever arm of the sectionC. Lever arm of the section D. One and half lever arm of the section
Long and short spans of a two way slab are l and l and load on the slab acting on strips parallel to lx and ly be wx and wy respectively. Accordingy to xRankine Grashoff theory___________________? A. (wx/wy) = (ly/lx) B. (wx/wy) = (ly/lx)²C. (wx/wy) = (ly/lx)4 D. None of these
The transverse reinforcements provided at right angles to the main reinforcement_______________? A. Distribute the load B. Resist the temperature stresses C. Resist the shrinkage stressD. All the above
If p1 and P2 are effective lateral loadings at the bottom and top exerted by a level earth subjected to a super-load on the vertical face of height h of a retaining wall, the horizontal pressure p per unit length of the wall, is____________________? A. [( – )/2] h B. [( + )/4] hC. [(…
If R and T are rise and tread of a stair spanning horizontally, the steps are supported by a wall on one side and by a stringer beam on the other side, the steps are designed as beams of width_______________? A. R + T B. T – RC. 2 + T2) D. R – T
After pre-stressing process is completed, a loss of stress is due to______________? A. Shrinkage of concrete B. Elastic shortening of concrete C. Creep of concreteD. All the above