Rcc Structures Design - Study Mode
[#61] In a slab, the pitch of the main reinforcement should not exceed its effective depth
Correct Answer
(A) Three times
[#62] If ‘A’ is the sectional area of a pre-stressed rectangular beam provided with a tendon pre-stressed by a force ‘P’ through its centroidal longitudinal axis, the compressive stress in concrete, is
Correct Answer
(A) $$frac{{ ext{P}}}{{ ext{A}}}$$
[#63] The breadth of a ribbed slab containing two bars must be between
Correct Answer
(B) 8 cm to 10 cm
[#64] The stresses developed in concrete and steel in reinforced concrete beam 25 cm width and 70 cm effective depth, are 62.5 kg/cm 2 and 250 kg/cm 2 respectively. If m = 15, the depth of its neutral axis is
Correct Answer
(C) 30 cm
[#65] If the modular ratio is ‘m’, steel ratio is ‘r’ and overall depth of a beam is ‘d’, the depth of the critical neutral axis of the beam, is
Correct Answer
(B) $$frac{{ ext{m}}}{{{ ext{m}} + { ext{r}}}} imes { ext{d}}$$