civil engineering Mcqs
451. In the triaxial compression test, the application of additional axial stress (i.e. deviator stress) on the soil specimen produces shear stress on__________________?
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A. horizontal plane only

B. vertical plane only

C. both horizontal and vertical planes

D. all planes except horizontal and vertical planes
452. The clay mineral with the largest swelling and shrinkage characteristics is_______________?
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A. montmorillonite

B. none of the above

C. illite

D. kaolinite

453. If is the net upward pressure on a square footing of side for a square column of side , the maximum bending moment is given by_________________?
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A. B.M = pb (c a)/4

B. B.M = pb (b a)/4

C. B.M = pb (b + a)/8

D. B.M = pb (b a)/8
454. Select the incorrect statement?
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A. Bearing capacity of a soil depends upon shape and size of footing

B. Bearing capacity of a soil depends upon the amount and direction of load

C. Bearing capacity of a soil depends on the type of soil

D. Bearing capacity of a soil is indepen-dent of rate of loading

455. In a consolidated drained test on a normally consolidated clay, the volume of the soil sample during shear________________?
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A. decreases

B. increases

C. first increases and then decreases

D. remains unchanged

456. Allowable bearing pressure for a foundation depends upon_______________?
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A. allowable settlement only

B. ultimate bearing capacity of soil only

C. both allowable settlement and ultimate bearing capacity

D. none of above

457. A very comfortable type of stairs is_______________?
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A. Straight

B. Dog legged

C. Open newel

D. Geometrical

458. Prestress loss due to friction occurs________________?
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A. only in post-tensioned beams

B. only in pretensioned beams

C. in both post-tensioned and preten-sioned beams

D. none of the above

459. Stokes law is valid only if the size of particle is________________?
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A. all of the above

B. less than 0.0002 mm

C. between 0.2 mm and 0.0002 mm

D. greater than 0.2 mm

460. Select the incorrect statement ?
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A. increases as the size of particles increases

B. increases as the soil gradation im-proves

C. is limited to a maximum value of 45

D. ective angle of shearing resistance

E. is rarely more than 30 for fine grained soil

461. A beam curved in plan is designed for_______________?
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A. bending moment, shear and torsion

B. bending moment and torsion

C. bending moment and shear

D. shear and torsion

462. If is the uniformly distributed load on a circular slab of radius maximum positive radial moment at its centre, is__________________?
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A. None of these

B. 3WR/16

C. 2WR/16

D. WR/16
463. Due to circumferential action of the spiral in a spirally reinforced column________________?
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A. capacity of column is decreased

B. ductility of column reduces

C. capacity of column is decreased but ductility of column increases

D. both the capacity of column and ductility of column increase
464. If the foundations of all the columns of a structure are designed on the total live and dead load basis, then_________________?
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A. there will be no differential settlement

B. the settlement of exterior columns will be more than interior columns

C. the settlement of interior columns will be more than exterior columns

D. there will be no settlement of columns

465. Valid range for n, the percentage voids, is______________?
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A. n<0

B. 0

C. 0<n0

466. Lapped splices in tensile reinforcement are generally not used for bars of size larger than______________?
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A. 30 mm diameter

B. 36 mm diameter

C. 18 mm diameter

D. 24 mm diameter

467. Water content of soil can______________?
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A. never be greater than 100 %

B. take values only from 0 % to 100 %

C. be greater than 100 %

D. be less than 0 %

468. For a ribbed slab______________?
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A. Clear spacing between ribs shall not be greater than 4.5 cm

B. Width of the rib shall not be less than 7.5 cm

C. All the above

D. Overall depth of the slab shall not exceed four times the breadth of the rib

469. Which of the following losses of prestress occurs only in pretensioning and not in post-tensioning ?
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A. elastic shortening of concrete

B. loss due to friction

C. creep of concrete

D. shrinkage of concrete

470. In reinforced concrete footing on soil, the minimum thickness at edge should not be less than______________?
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A. 100 mm

B. 250 mm

C. 200 mm

D. 150 mm
471. Uniformity coefficient of a soil is__________________?
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A. always equal to 1

B. always less than 1

C. equal to or less than 1

D. equal to or gi eater than 1
472. When shear stress exceeds the permissible limit in a slab, then it is reduced by____________?
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A. increasing the depth

B. using high strength steel

C. using thinner bars but more in number

D. providing shear reinforcement

473. Skemptons pore pressure coefficient B for saturated soil is________________?
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A. zero

B. between 0 and 1

C. greater than 1

D. 1
474. A T-shaped retaining wall mainly conssits of_________________?
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A. one cantilever

B. two cantilevers

C. three cantilevers

D. four cantilevers

475. If the width of the foundation for two equal columns is restricted, the shape of the footing generally adopted, is__________________?
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A. Square

B. Trapezoidal

C. Triangular

D. Rectangular
476. In hydrometer analysis for a soil mass______________?
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A. both meniscus correction and dispersing agent correction are additive

B. both meniscus correction and dispersing agent correction are subtractive

C. meniscus correction is additive and dispersing agent correction is subtractive

D. meniscus correction is subtractive and dispersing agent correction is additive

477. If the volume of voids is equal to the volume of solids in a soil mass, then the values of porosity and voids ratio respectively are________________?
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A. 0.0 and 1.0

B. 1.0 and 0.0

C. 0.5 and 1.0

D. 1.0 and 0.5

478. When the plastic limit of a soil is greater than the liquid limit, then the plasticity index is reported as_____________?
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A. negative

B. 1

C. non-plastic (NP)

D. zero
479. Which of the following methods is more suitable for the determination of permeability of clayey soil ?
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A. horizontal permeability test

B. falling head method

C. none of the above

D. constant head method

480. is the pre- stressed force applied to tendon of a rectangular pre-stressed beam whose area of cross section is and sectional modulus is . The minimum stress on the beam subjected to a maximum bending moment is________________?
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A. f = (P/A) (M/Z)

B. f = (P/A) (M/6Z)

C. f = (P/A) (Z/M)

D. f = (A/P) (M/Z)

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