civil engineering MCQs – Page 33

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 Review each marked answer and report any item that may be outdated or unclear.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

641. Select the correct statement?
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A. Unit weight of soil increases due to submergence in water

B. For dry soils, dry unit weight is less than total unit weight

C. Unit weight of dry soil is greater than unit weight of wet soil

D. Unit weight of soil decreases due to submergence in water

642. The total and effective stresses at a depth of 5 m below the top level of water in a swimming pool are respectively__________________?
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A. 0.5 kg/cm2 and 0.5 kg/cm2

B. 0.5 kg/cm2 and zero

C. 1.0 kg/cm2 and 0.5 kg/cm2

D. zero and zero

643. Which of the following statements is incorrect ?
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A. Minimum cross sectional area of longitudinal reinforcement in a column is 0.8%

B. The number of longitudinal bars provided in a circular column should not be less than four

C. Reinforcing bars in a column should not be less than 12 mm in diameter

D. Spacing of longitudinal bars measured along the periphery of column should not exceed 300 mm

644. For a loose sand sample and a dense sand sample consolidated to the same effective stress_____________?
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A. ultimate strength is same but peak strength of dense sand is greater than that of loose sand

B. ultimate strength is different but peak strength is same

C. ultimate strength is same and also peak strength is same

D. ultimate strength is same but peak

645. 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

646. The average coefficient of permeability of natural deposits________________?
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A. parallel to stratification is always greater than that perpendicular to stratification

B. parallel to stratification is always less than that perpendicular to stratification

C. is always same in both directions

D. parallel to stratification may or may not be greater than that perpendicular to stratification

647. 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 + fraction of live load

D. dead load + live load

648. Minimum pitch of transverse reinforcement in a column is________________?
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A. forty-eight times the diameter of transverse reinforcement

B. sixteen times the smallest diameter of longitudinal reinforcement bar to be tied

C. lesser of the above three values

D. the least lateral dimension of the member

649. The minimum cover to the ties or spirals should not be less than________________?
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A. 20 mm

B. 50mm

C. 25 mm

D. 15 mm

650. The depth of footing for an isolated column is governed by______________?
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A. pan style="color: #003f1a;">2. shear force

B. pan style="color: #003f1a;">3. punching shear

C. correct answer is?

D. an style="color: #003f1a;">1. maximum bending moment

651. A soil has a bulk density of 22 kN/m3 and water content 10 %. The dry density of soil is_______________?
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A. 22.0 kN/m3

B. 20.0 kN/m3

C. 18.6 kN/m3

D. 23.2 kN/m3

652. A continuous beam is deemed to be a deep beam when the ratio of effective span to overall depth (1/D. is less than__________________?
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A. 3

B. 2.5

C. 1.5

D. 2

653. The total discharge from two wells situated near to each other is_________________?
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A. less than the sum of the discharges from individual wells

B. greater than the sum of the discharges from individual wells

C. equal to larger of the two discharges from individual wells

D. sum of the discharges from individual wells

654. Select the incorrect statement?
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A. Bleeding can be increased by addition of calcium chloride

B. Lean mixes bleed more as compared to rich ones

C. Bleeding can be minimized by adding pozzuolana finer aggregate

D. none of the above

655. Maximum distance between expansion joints in structures as per IS : 456 1978 is________________?
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A. 20 m

B. 30 m

C. 60 m

D. 45 m

656. The minimum cover in a slab should neither be less than the diameter of bar nor less than_______________?
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A. 25 mm

B. 10 mm

C. 13 mm

D. 15 mm

657. Which of the following soils has more plasticity index ?
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A. sand

B. clay

C. silt

D. gravel

658. Most common method of prestressing used for factory production is________________?
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A. Magnel-Blaton system

B. Freyssinet system

C. Lee-Macall system

D. Long line method

659. For a reinforced concrete section, the shape of shear stress diagram is_______________?
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A. wholly rectangular

B. parabolic above neutral axis and rectangular below neutral axis

C. rectangular above neutral axis and parabolic below neutral axis

D. wholly parabolic

660. The minimum clear cover for R.C.C. columns shall be_________________?
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A. Smaller of 40 mm or diameter

B. Greater of 25 mm or diameter

C. Greater of 40 mm or diameter

D. Smaller of 25 mm or diameter

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