Civil Engineering MCQs

Page No. 229

According to the steel beam theory of doubly reinforced beams______________?


aTension is resisted by tension steel


bCompression is resisted by compression steel


cStress in tension steel equals the stress in compression steel


dAll the above


View Answer All the above

If the diameter of the main reinforcement in a slab is 16 mm, the concrete cover to main bars is_____________?


a10 mm


b 12 mm


c 14 mm


d16 mm


View Answer 16 mm

The breadth of a ribbed slab containing two bars must be between______________?


a6 cm to 7.5 cm


b8 cm to 10 cm


c10 cm to 12 cm


d12 cm to 15 cm


View Answer 8 cm to 10 cm

A column is regarded as long column if the ratio of its effective length and lateral dimension, exceeds_________________?


a10


b15


c20


d25


View Answer 15

The maximum diameter of a bar used in a ribbed slab, is______________?


a12 mm


b6 mm


c20 mm


d 22 mm


View Answer 22 mm

If the depth of actual neutral axis of a doubly reinforced beam______________?


aIs greater than the depth of critical neutral axis, the concrete attains its maximum stress earlier


bIs less than the depth of critical neutral axis, the steel in the tensile zone attains its maximum stress earlier


c Is equal to the depth of critical neutral axis; the concrete and steel attain their maximum stresses simultaneously


dAll the above


View Answer All the above

The stresses developed in concrete and steel in reinforced concrete beam 25 cm width and 70 cm effective depth, are 62.5 kg/cm2 and 250 kg/cm 2 respectively. If m = 15, the depth of its neutral axis is_______________?


a 20 cm


b 25 cm


c30 cm


d35 cm


View Answer 30 cm

is the pre-stressed force applied to the tendon of a rectangular pre-stressed beam whose area of cross section is and sectional modulus is . The maximum stress in the beam, subjected to a maximum bending moment , is_________________?


a f = (P/A) + (Z/M)


bf = (A/P) + (M/Z)


c f = (P/A) + (M/Z)


df = (P/A) + (M/6Z)


View Answer f = (P/A) + (M/Z)

For the design of a simply supported T-beam the ratio of the effective span to the overall depth of the beam is limited to______________?


a10


b15


c25


d20


View Answer 20

The width of the rib of a T-beam, is generally kept between_______________?


a1/7 to 1/3 of rib depth


b 1/3 to 1/2 of rib depth


c1/2 to 3/4 of rib depth


d1/3 to 2/3 of rib depth



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