civil engineering MCQs – Page 240

Practise multiple-choice questions from civil engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

civil engineering Mcqs
4781. 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

4782. 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

4783. If the size of panel in a flat slab is 6m x 6m, then as per Indian Standard Code, the widths of column strip and middle strip are__________________?
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A. 1.5 m and 3.0 m

B. 3.0 m and 1.5 m

C. 1.5 m and 1.5 m

D. 3.0 m and 3.0 m
4784. 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

4785. 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
4786. 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

4787. The individual variation between test strength of sample should not be more than______________?
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A. 5% of average

B. 20% of average

C. 15% of average

D. 10% of average

4788. According to IS: 456-1978, the maximum reinforcement in a column is_____________?
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A. 8%

B. 6 %

C. 4%

D. 2%

4789. 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

4790. 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

4791. If nominal shear stress tv exceeds the design shear strength of concrete xc, the nominal shear reinforcement as per IS : 456-1978 shall be provided for carrying a shear stress equal to__________________?
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A. Tv + Tc

B. xv TC

C. xv

D. xc

4792. For walls, columns and vertical faces of all structural members, the form work is generally removed after_______________?
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A. 3 days

B. 7 days

C. 14 days

D. 24 to 48 hours
4793. 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

4794. A T-shaped retaining wall mainly conssits of_________________?
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A. one cantilever

B. four cantilevers

C. three cantilevers

D. two cantilevers

4795. Half of the main steel in a simply supported slab is bent up near the support at a distance of x from the center of slab bearing where x is equal to________________?
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A. re 1 is the span

B. 10-Jan

C. 5-Jan

D. 3-Jan

E. 1/7
4796. 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

4797. The minimum cover in a slab should neither be less than the diameter of bar nor less than_______________?
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A. 15 mm

B. 13 mm

C. 25 mm

D. 10 mm

4798. Minimum grade of concrete to be used in reinforced concrete as per IS:456-1978 is_____________?
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A. M15

B. M20

C. M 10

D. M25

4799. Lap length in compression shall not be less than______________?
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A. 20

B. 15 4>

C. 30 (j)

D. 24 (j)
4800. In case of hand mixing of concrete, the extra cement to be added is__________________?
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A. 10%

B. 5%

C. 15%

D. 20%