civil engineering Mcqs
601. The load carrying capacity of a helically reinforced column as compared to that of a tied column is about________________?
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A. 5% more

B. 10% less

C. 5% less

D. 10% more

602. Select the correct statement?
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A. The greater the unit weight, the greater is permeability

B. The greater the viscosity, the greater is permeability

C. The greater the unit weight, the smaller is permeability

D. Unit weight does not affect per-meability

603. According to ISI recommendations, the maximum depth of stress block for balanced section of a beam of effective depth d is__________________?
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A. 0.85 d

B. 0.55 d

C. 0.43 d

D. 0.68 d

604. Rise of water table above the ground surface causes________________?
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A. increase in pore water pressure but decrease in total stress

B. equal increase in pore water pressure and total stress

C. equal decrease in pore water pressure and total stress

D. decrease in pore water pressure but increase in total stress

605. Terzaghis bearing capacity factors Nc, Nq and Nr are functions of______________?
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A. cohesion only

B. angle of internal friction only

C. both cohesion and angle of internal friction

D. none of the above

606. In case the factor of safety against sliding is less than 1.5, a portion of slab is constructed downwards at the end of the heel slab, which is known as___________________?
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A. A cut-off wall

B. A key

C. All the above

D. A rib

607. If the ratio of the span to the overall depth does not exceed 10, the stiffness of the beam will ordinarily be satisfactory in case of a__________________?
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A. None of these

B. Continuous beam

C. Simply supported beam

D. Cantilever beam
608. A pre-stressed concrete member is preferred because___________________?
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A. All the above

B. Large size of long beams carrying large shear force need not be adopted

C. Removal of cracks in the members due to shrinkage

D. Its dimensions are not decided from the diagonal tensile stress

609. carrying a uniformly distributed load per metre length is suspended at two A pile of length points, the maximum, B.M. at the centre of the pile or at the points of suspension, is_________________?
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A. WL/47

B. WL/8

C. WL/16

D. WL/24

610. Select the incorrect statement ?
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A. Better control is achieved on the drainage of the soil in a triaxial compression test

B. In a direct shear box test, the plane of shear failure is predetermined

C. Unconfined compression test can be carried out on all types of soils

D. Stress distribution on the failure plane in the case of triaxial compression test is uniform

611. In a pre-stressed member it is advisable to use________________?
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A. Low strength concrete but high tensile steel

B. High strength concrete and high tensile steel

C. High strength concrete only

D. Low strength concrete only

612. Contact pressure beneath a rigid footing resting on cohesive soil is_________________?
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A. less at edges compared to middle

B. uniform throughout

C. none of the above

D. more at edges compared to middle
613. A retaining wall 6m high supports a backfill with a surcharge angle of 10. The back of the wall is inclined to the vertical at a positive batter angle of 5. If the angle of wall friction is 7, then the resultant active earth pressure will act at a distance of 2 m above the base and inclined to the horizontal at an angle of_________________?
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A. 7

B. 17

C. 10

D. 12
614. If the voids of a soil mass are full of air only, the soil is termed as_______________?
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A. air entrained soil

B. dehydrated soil

C. partially saturated soil

D. dry soil
615. In T-shaped R C. retaining walls, the main reinforcement in the stem is provided on______________?
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A. the front face in one direction

B. the front face in both directions

C. the inner face in one direction

D. the inner face in both directions

616. For better strength and stability, the fine grained soils and coarse grained soils are compacted respectively as____________________?
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A. dry of OMC and wet of OMC

B. dry of OMC and dry of OMC where OMC is optimum moisture content

C. wet of OMC and dry of OMC

D. wet of OMC and wet of OMC

617. Coefficient of consolidation of a soil is affected by_______________?
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A. compressibility

B. permeability

C. both compressibility and permeability

D. none of the above

618. If the water content of a fully saturated soil mass is 100%, then the voids ratio of the sample is________________?
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A. independent of specific gravity of soil

B. less than specific gravity of soil

C. equal to specific gravity of soil

D. greater than specific gravity of soil

619. The minimum thickness of the cover at the end of a reinforcing bar should not be less than twice the diameter of the bar subject to a minimum of___________________?
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A. 20 mm

B. 10 mm

C. 15 mm

D. 25 mm
620. Physical properties of a permeant which influence permeability are________________?
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A. viscosity only

B. unit weight only

C. both viscosity and unit weight

D. none of the above

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%

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