civil engineering Mcqs
4751. As compared to ordinary portland cement, use of pozzuolanic cement_______________?
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A. increases shrinkage

B. reduces workability

C. increases strength

D. increases bleeding

4756. The average permissible stress in bond for plain bars in tension is_______________?
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A. increased by 25% for bars in compression

B. decreased by 10% for bars in compression

C. decreased by 25% for bars in compression

D. increased by 10% for bars in compression

4757. Admixtures which cause early setting, and hardening of concrete are called_______________?
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A. retarders

B. accelerators

C. workability admixtures

D. air entraining agents

4759. Increase in the moisture content in concrete_________________?
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A. all of the above

B. does not change the strength

C. reduces the strength

D. increases the strength

4760. As compared to ordinary portland cement, high alumina cement has______________?
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A. higher initial setting time but lower final setting time

B. lower initial and final setting times

C. lower initial setting time but higher final setting time

D. higher initial and final setting times

4761. To minimise the effect of differential settlement, the area of a footing should be designed for______________?
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A. live load + fraction of dead load

B. dead load only

C. dead load + live load

D. dead load + fraction of live load
4763. One of the criteria for the effecvve width of flange of T-beam is bf =+ bw +6Df 6 In above formula, l0 signifies_______________?
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A. clear span of the T-beam

B. effective span of T-beam

C. distance between points of zero moments in the beam

D. distance between points of maximum moments in the beam

4764. If the depth of neutral axis for a singly reinforced rectangular section is represented by kd in working stress design, then the value of k for balanced section_______________?
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A. depends on as, only

B. depends on aCbC only

C. depends on both crst and acbc

D. is independant of both ast and acbc where d is the effective depth, ast is per-missible stress in steel in tension and ocbc is permissible stress in concrete in bending compression

4767. The factor of safety for______________?
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A. steel is higher than that for concrete

B. steel and concrete are same

C. steel is lower than that for concrete

D. none of the above

4771. The permissible diagonal tensile stress in reinforced brick work is_____________?
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A. about 1.0 N/mm2

B. 0.3 N/mm2 to 0.7 N/mm2

C. about 0.1 N/mm2

D. zero

4781. In counterfort retaining walls, the main reinforcement in the stem at support is_______________?
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A. not provided

B. provided only on inner face

C. provided only on front face

D. provided both on inner and front faces

4782. Workability of concrete is directly proportional to________________?
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A. all of above

B. grading of the aggregate

C. aggregate cement ratio

D. time of transit

4783. Poissons ratio for concrete_______________?
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A. none of the above

B. decreases with richer mixes

C. increases with richer mixes

D. remains constant

4785. Critical section for shear in case of flat slabs is at a distance of_______________?
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A. d/2 from periphery of column/capital/ drop panel

B. effective depth of slab from periphery of column/drop panel

C. at the drop panel of slab

D. at the periphery of column

4786. According to IS : 456 -1978, the modulus of elasticity of concrete Ec (in N/mm2) can be taken as______________?
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A. Ec = where fck N/mm2 = 700 is the characteristic strength in

B. Ec = = 570

C. Ec = = 5700fck

D. Ec = = 5700
4787. The relation between modulus of rupturefcr and characteristic strength of concrete fck is given by_______________?
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A. fcr=1.2Vf7

B. fcr=0.57f7

C. fcr=0.7Vf7

D. re fcr and fck are in N/mm2?

E. fcr=0.35Vf7

4790. If a beam fails in bond, then its bond strength can be increased most economi-cally by___________?
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A. increasing the depth of beam

B. using thinner bars but more in number

C. using thicker bars but less in number

D. providing vertical stirrups

4791. While designing the pile as a column, the end conditions are nearly_______________?
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A. both ends hinged

B. both ends fixed

C. one end fixed and other end hinged

D. one end fixed and other end free

4794. The temperature reinforcement in the vertical slab of a T-shaped R.C. retaining wall is______________?
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A. provided more on inner face than on front face

B. provided more on front face than on inner face

C. not needed

D. provided equally on inner and front faces

4795. A T-shaped retaining wall mainly conssits of_________________?
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A. one cantilever

B. four cantilevers

C. three cantilevers

D. two cantilevers

4797. In a counterfort retaining wall, the main reinforcement in the stem at mid span is provided on_______________?
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A. front face only

B. inner face only

C. both front face and inner face

D. none of the above