civil engineering MCQs – Page 32

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 Review each marked answer and report any item that may be outdated or unclear.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
621. If the storey height is equal to length of RCC wall, the percentage increase in strength is_____________?
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A. 20

B. 0

C. 30

D. 10
622. Maximum percentage reinforcement in case of slabs is limited to___________________?
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A. 6

B. 4

C. 2

D. 8

623. During erection, the pile of length / is supported by a crane at a distance of________________?
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A. 0.293 /

B. 0.7071

C. 0.793 /

D. 0.207 /

624. According to Whitneys theory, ultimate strain of concrete is assumed to be_____________?
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A. 0.3%

B. 0.03%

C. 3%

D. 0.10%

625. In a triaxial compression test when drainage is allowed during the first stage (i. e. application of cell pressure) only and not during the second stage (i.e. application of deviator stress at constant cell pressure), the test is known as__________________?
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A. consolidated drained test

B. consolidated undrained test

C. unconsolidated drained test

D. unconsolidated undrained test

626. The coefficient of active earth pressure for a loose sand having an angle of internal friction of 30 is___________________?
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A. 2-Jan

B. 3

C. 1/3

D. 1

627. The centroid of compressive force, from the extreme compression fiber, in limit state design lies at a distance of__________________?
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A. 0.573 xu

B. 0.367 xu

C. 0.416 xu

D. 0.446 xu

628. If a cohesive soil specimen is subjected to a vertical compressive load, the inclination of the cracks to the horizontal is__________________?
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A. 45

B. 22.5

C. 0

D. 90

629. The ultimate consolidation settlement of a structure resting on a soil_______________?
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A. decreases with the decrease in the plastic limit

B. decreases with the increase in the initial voids ratio

C. increases with the decrease in the porosity of the soil

D. increases with the increase in the initial voids ratio

630. The effect of adding calcium chloride in concrete is________________?
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A. e="color: #003f1a;">2. to decrease shrinkage

B. (2)and (3)

C. (1) and (3)

D. e="color: #003f1a;">3. to increase setting time

E. (2)and (4)

F. ="color: #003f1a;">1. to increase shrinkage
631. Direct measurement of permeability of the specimen at any stage of loading can be made_______________?
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A. only in fixed ring type consolido-meter

B. only in floating ring type consolido-meter

C. both (A) and (B)

D. none of the above

632. The most suitable method for drainage of fine grained cohesive soils is________________?
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A. electroosmosis method

B. deep well system

C. well ppint system

D. vacuum method

633. 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. 10-Jan

B. 3-Jan

C. re 1 is the span

D. 1/7

E. 5-Jan

634. The slope of isochrone at any point at a given time indicates the rate of change of_______________?
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A. pore water pressure with depth

B. effective stress with depth

C. effective stress with time

D. pore water pressure with time

635. A pycnometer is used to determine_______________?
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A. specific gravity and dry density

B. water content and voids ratio

C. voids ratio and dry density

D. water content and specific gravity
636. mutually perpendicular principal stresses acting on a soil mass, the normal stress If p1 and p2 are________________?
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A. [(p p p p /2] sin 2

B. [(p p p p to the principal plane carrying the principal stress p1, is:

C. 2

D. [(p p p p cos 2

E. [(p p p p cos 2

637. Rankines theory of earth pressure assumes that the back of the wall is_______________?
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A. plane and smooth

B. plane and rough

C. vertical and rough

D. vertical and smooth
638. Coefficient of consolidation for clays normally_______________?
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A. decreases with increase in liquid limit

B. first increases and then decreases with increase in liquid limit

C. remains constant at all liquid limits

D. increases with increase in liquid limit

639. Which of the following methods is most accurate for the determination of the water content of soil ?
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A. calcium carbide method

B. sand bath method

C. oven drying method

D. pycnometer method

640. In working stress design, permissible bond stress in the case of deformed bars is more than that in plain bars by_______________?
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A. 30%

B. 20%

C. 40%

D. 10%