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 stresses
(D) All the above
Design of a two way slab simply supported on edges and having no provision to prevent the corners from lifting, is made by_________________?
(A) Rankine formula
(B) Marcus formula
(C) Rankine Grashoff formula
(D) Grashoff formula
A pre-stressed rectangular beam which carries two concentrated loads W at L/3 from either end, is provided with a bent tendon with tension P such that central one-third portion of the tendon remains parallel to the longitudinal axis, the maximum dip h is_____________________?
(A) WL/P
(B) WL/2P
(C) WL/3P
(D) WL/4P
For initial estimate for a beam design, the width is assumed__________________?
(A) 1/15th of span
(B) 1/20th of span
(C) 1/25th of span
(D) 1/30th of span
Total pressure on the vertical face of a retaining wall of height h acts parallel to free surface and from the base at a distance of_____________________?
(A) h /4
(B) h/3
(C) h/2
(D) 2h/3
Spacing of stirrups in a rectangular beam, is__________________?
(A) Kept constant throughout the length
(B) Decreased towards the centre of the beam
(C) Increased at the ends
(D) Increased at the centre of the beam
The Young’s modulus of elasticity of steel, is__________________?
(A) 150 KN/mm2
(B) 200 KN/mm2
(C) 250 KN/mm2
(D) 275 KN/mm2
If the tendon is placed at an rectangular beam (sectional top edge)________________?
(A) Is increased by PZ/e
(B) Is increased by Pe/Z
(C) Is decreased by Pe/Z
(D) Remains unchanged
If the length of a combined footing for two columns l metres apart is L and the projection on the left side of the exterior column is x, then the projection y on the right side of the exterior column, in order to have a uniformly distributed load, is (where is the distance of centre of gravity of column loads______________?
(A) y = L – (l – ) )
(B) y = L/2 + (l –
(C) y = L/2 – (l + )
(D) y = L/2 – (l – )
If the loading on a pre-stressed rectangular beam, is uniformly distributed, the tendon to be provided should be_______________?
(A) Straight below centroidal axis
(B) Parabolic with convexity downward
(C) Parabolic with convexity upward
(D) Straight above centroidal axis