In prestressed concrete______________?
(A) forces of tension and compression change but lever arm remains unchanged
(B) forces of tension and compressions remain unchanged but lever arm changes with the moment
(C) both forces of tension and compres-sion as well as lever arm change
(D) both forces of tension and compres-sion as well as lever arm remain unchanged
In a spherical dome the hoop stress due to a concentrated load at crown is_______________?
(A) compressive everywhere
(B) tensile everywhere
(C) partly compressive and partly tensile
(D) zero
A beam curved in plan is designed for_______________?
(A) bending moment and shear
(B) bending moment and torsion
(C) shear and torsion
(D) bending moment, shear and torsion
Due to shrinkage stresses, a simply supported beam having reinforcement only at bottom tends to_____________?
(A) deflect downward
(B) deflect upward
(C) deflect downward or upward
(D) none of the above
In T-shaped R C. retaining walls, the main reinforcement in the stem is provided on______________?
(A) the front face in one direction
(B) the front face in both directions
(C) the inner face in one direction
(D) the inner face in both directions
The recommended value of modular ratio for reinforced brick work is______________?
(A) 18
(B) 30
(C) 40
(D) 58
The effect of creep on modular ratio is__________________?
(A) to decrease it
(B) to increase it
(C) either to decrease or to increase it
(D) to keep it unchanged
In symmetrically reinforced sections, shrinkage stresses in concrete and steel are respectively_______________?
(A) compressive and tensile
(B) tensile and compressive
(C) both compressive
(D) both tensile
In a spherical dome subjected to concentrated load at crown or uniformly distributed load, the meridional force is always________________?
(A) zero
(B) tensile
(C) compressive
(D) tensile or compressive
The maximum value of hoop compression in a dome is given by___________________?
(A) wR / 4d
(B) wR/2d
(C) wR/d
(D) 2wR/d