civil engineering MCQs – Page 25

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 Review each marked answer and report any item that may be outdated or unclear.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
481. If the natural water content of soil mass lies between its liquid limit and plastic limit, the soil mass is said to be in______________?
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A. liquid state

B. semi-solid state

C. plastic state

D. solid state

482. As per Whitneys theory, the maximum moment of resistance of the balanced section of a beam of width b and effective depth d is given by_______________?
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A. ^acybd2

B. 0.185acybd2

C. 0.43acybd2

D. re acy is the cylinder compressive strength of concrete

E. ^acybd2

483. The effect of creep on modular ratio is__________________?
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A. to decrease it

B. to keep it unchanged

C. either to decrease or to increase it

D. to increase it
484. A fully saturated soil is said to be________________?
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A. one phase system

B. two phase system with soil and air

C. three phase system

D. two phase system with soil and water
485. The hydraulic head that would produce a quick condition in a sand stratum of thickness 1.5 m, specific gravity 2.67 and voids ratio 0.67 is equal to_______________?
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A. 1.5 m

B. 1.0m

C. 3m

D. 2.0 m

486. The recommended value of modular ratio for reinforced brick work is______________?
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A. 40

B. 18

C. 30

D. 58

487. 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

488. Degree of consolidation is________________?
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A. directly proportional to drainage path and inversely proportional to time

B. directly proportional to square of drainage path and inversely proportional to time

C. directly proportional to time and inversely proportional to square of drainage path

D. directly proportional to time and inversely proportional to drainage path

489. Which of the following methods is best suited for determination of permeability of coarse-grained soils ?
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A. constant head method

B. falling head method

C. both the above

D. none of the above

490. Sensitivity of a soil can be defined as___________________?
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A. ratio of volume of voids to volume of solids

B. percentage of volume change of soil under saturated condition

C. ratio of compressive strength of unconfined undisturbed soil to that of soil in a remoulded state

D. none of the above

491. Valid range for S, the degree of saturation of soil in percentage is______________?
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A. 0 < S < 100

B. S>0

C. S<0

D. 0<S<100

492. When the degree of saturation is zero, the soil mass under consideration represents______________?
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A. two phase system with soil and water

B. one phase system

C. two phase system with soil and air

D. three phase system

493. The purpose of reinforcement in prestressed concrete is________________?
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A. to impart initial compressive stress in concrete

B. all of the above

C. to resist tensile stresses

D. to provide adequate bond stress

494. The minimum diameter of longitudinal bars in a column is________________?
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A. 16 mm

B. 6 mm

C. 12 mm

D. 8 mm

495. The ratio of volume of voids to the total volume of soil mass is called______________?
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A. voids ratio

B. percentage air voids

C. air content

D. porosity
496. If the shearing stress is zero on two planes, then the angle between the two planes is________________?
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A. 225

B. 135

C. 90

D. 45

497. Total number of stress components at a point within a soil mass loaded at its boundary is______________?
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A. 9

B. 6

C. 3

D. 16

498. In symmetrically reinforced sections, shrinkage stresses in concrete and steel are respectively_______________?
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A. compressive and tensile

B. tensile and compressive

C. both compressive

D. both tensile

499. The ultimate consolidation settlement of a soil is________________?
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A. none of the above

B. inversely proportional to the compression index

C. directly proportional to the compression index

D. directly proportional to the voids ratio

500. Which of the following is a measure of particle size range ?
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A. coefficient of curvature

B. effective size

C. none of the above

D. uniformity coefficient