civil engineering Mcqs
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

661. A normally consolidated clay settled 10 mm when effective stress was increased from 100 kN/m2 to 200 kN/ m2. If the effective stress is further increased from 200 kN/ m2 to 400 kN/ m2, then the settlement of the same clay is__________________?
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A. none of the above

B. 40 mm

C. 20 mm

D. 10 mm
662. According to Atterberg, the soil is said to be of medium plasticity if the plasticity index PI is____________?
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A. 7

B. 0 < PI < 7

C. 17<PI27

663. The maximum dry density upto which any soil can be compacted depends upon____________?
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A. moisture content only

B. amount of compaction energy only

C. both moisture content and amount of compaction energy

D. none of the above

664. According to IS: 456-1978, the maximum reinforcement in a column is_____________?
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A. 8%

B. 2%

C. 4%

D. 6 %
665. An R.C.C. beam of 6 m span is 30 cm wide and has a lever arm of 55 cm. If it carries a U.D.L. of 12 t per m and allowable shear stress is 5 kg/cm2, the beam________________?
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A. Is safe with stirrups

B. Needs revision of section

C. Is safe in shear

D. Is safe with stirrups and inclined bars

666. The main reinforcement in the heel of a T-shaped R.C. retaining wall is provided on______________?
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A. top face perpendicular to wall

B. bottom face perpendicular to wall

C. both top and bottom faces perpendicular to wall

D. none of the above

667. If the permeability of a soil is 0.8 mm/sec, the type of soil is_______________?
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A. sand

B. clay

C. silt

D. gravel

668. If the sand in-situ is in its densest state, then the relative density of sand is_____________?
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A. between 0 and 1

B. 1

C. zero

D. greater than 1

669. The effect of cohesion on a soil is to______________?
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A. reduce both the active earth pressure intensity and passive earth pressure intensity

B. increase both the active earth pressure intensity and passive earth pressure intensity

C. reduce the active earth pressure in-tensity but to increase the passive earth pressure intensity

D. increase the active earth pressure in-tensity but to reduce the passive earth pressure intensity

670. The admixture of coarser particles like sand or silt to clay causes______________?
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A. decrease in liquid limit and increase in plasticity index

B. decrease in liquid limit and no change in plasticity index

C. decrease in both liquid limit and plasticity index

D. increase in both liquid limit and plasticity index

671. Due to a rise in temperature, the viscosity and the unit weight of the percolating fluid are reduced to 60% and 90% respectively. If other things remain constant, the coefficient of permeability__________________?
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A. increases by 50%

B. increases by 25%

C. decreases by 33.3%

D. increases by 33.3%

672. The minimum thickness of a flat slab is taken_________________?
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A. L/32 for end panels without drops

B. L/36 for end panels without drops

C. L/36 for interior panels without drop

D. All the above
673. While designing the pile as a column, the end conditions are nearly_______________?
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A. both ends hinged

B. both ends fixed

C. one end fixed and other end hinged

D. one end fixed and other end free

674. Compressibility of sandy soils is______________?
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A. much greater than that of clayey soils

B. almost equal to that of clayey soils

C. much less than that of clayey soils

D. none of the above

675. Residual soils are formed by______________?
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A. wind

B. none of the above

C. water

D. glaciers

676. The self-weight of the footing, is_____________?
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A. Not considered for calculating the upward pressure on footing

B. Also considered for calculating the upward pressure on footing

C. Not considered for calculating the area of the footing

D. Both B. and C

677. The rise of water table below the foundation influences the bearing capacity of soil mainly by reducing_______________?
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A. cohesion and effective angle of shearing resistance

B. effective angle of shearing resistance

C. cohesion and effective unit weight of soil

D. effective unit weight of soil and effective angle of shearing resistance

678. High carbon content in the steel causes_______________?
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A. decrease in tensile strength but increase in ductility

B. increase in tensile strength but decrease in ductility

C. decrease in both tensile strength and ductility

D. increase in both tensile strength and ductility

679. A higher modular ratio shows____________?
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A. higher tensile strength of steel

B. higher compressive strength of con-crete

C. lower compressive strength of concrete

D. lower tensile strength of steel

680. The diameter of ties in a column should be_______________?
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A. more than 5 mm but less than one-fourth of diameter of main bar

B. more than or equal to 5 mm

C. more than or equal to one fourth of diameter of main bar

D. more than 5 mm and also more than one-fourth of diameter of main bar
681. The water content of soil, which represents the boundary between plastic state and liquid state, is known as_________________?
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A. plastic limit

B. shrinkage limit

C. liquid limit

D. plasticity index

682. According to I.S. : 456, slabs which span in two directions with corners held down, are assumed to be divided in each direction into middle strips and edge strips such that the width of the middle strip, is______________?
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A. Three-fourth of the width of the slab

B. Four-fifth of the width of the slab

C. Half of the width of the slab

D. Two -third of the width of the slab

683. longitudinal bars and lateral stirrups, is__________________?
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A. None of these

B. Stress in concrete area of concrete + Stress in steel area of steel

C. Stress in steel area of steel

D. Stress in concrete area of concrete

684. The stresses developed in concrete and steel in reinforced concrete beam 25 cm width and 70 cm effective depth, are 62.5 kg/cm2 and 250 kg/cm 2 respectively. If m = 15, the depth of its neutral axis is_______________?
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A. 25 cm

B. 35 cm

C. 30 cm

D. 20 cm

685. A reinforced concrete cantilever beam is 3.6 m long, 25 cm wide and has its lever arm 40 cm. It carries a load of 1200 kg at its free end and vertical stirrups can carry 1800 kg. Assuming concrete to carry one-third of the diagonal tension and ignoring the weight of the beam, the number of shear stirrups required, is___________________?
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A. 35

B. 40

C. 45

D. 30

686. Which of the following is not a vector quantity_______________?
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A. acceleration

B. weight

C. force

D. velocity

E. moment

687. The diameter of longitudinal bars of a column should never be less than_____________?
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A. 10 mm

B. 12 mm

C. 8 mm

D. 6 mm

688. In a beam the local bond stress Sb, is equal to_______________?
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A. Leaver arm/(Bending moment Total perimeter of reinforcement)

B. Total perimeter of reinforcement/(Leaver arm Shear force)

C. Leaver arm/(Shear force Total perimeter of reinforcement)

D. Shear force/(Leaver arm Total perimeter of reinforcement)
689. A circular slab subjected to external loading, deflects to form a_________________?
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A. None of these

B. Paraboloid

C. Semi-hemisphere

D. Ellipsoid

690. According to I.S. 456, 1978 the thickness of reinforced concrete footing on piles at its edges, is kept less than______________?
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A. 20 cm

B. 75 cm

C. 40 cm

D. 30 cm
691. Dimensions of a beam need be changed if the shear stress is more than_______________?
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A. 25 kg/cm2

B. 20 kg/cm2

C. 15 kg/cm2

D. 10 kg/cm2

692. A foundation is called shallow if its depth, is________________?
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A. One-fourth of its width

B. Equal to its width

C. Three-fourth of its width

D. Half of its width

693. A retaining wall and is the horizontal earth pressure, the factor of safety If is weight of against sliding, is_____________?
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A. 1.5

B. 1.25

C. 2

D. 1

694. A sample of metal weighs 219 gms in air, 180 gms in water, 120 gms in an unknown fluid. Then which is correct statement about density of metal________________?
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A. metal is twice as dense as water

B. metal will float in water

C. none of the above

D. density of metal cant be determined

E. metal is twice as dense as unknown fluid

695. If the length of an intermediate span of a continuous slab is 5m, the length of the end span is kept_______________?
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A. 4.0 m

B. 3.0 m

C. 3.5 m

D. 4.5 m
696. bending moment of a simply supported slab is M Kg.cm, the effective depth of the If the maximum slab is (where Q is M.R. factor)________________?
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A. M/100Q

B. M/ Q

C. M/Q)

D. (M/100Q)
697. A column is regarded as long column if the ratio of its effective length and lateral dimension, exceeds_________________?
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A. 20

B. 25

C. 15

D. 10

698. In ideal machines________________?
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A. mechanical advantage is greater than velocity ratio

B. mechanical advantage is unity

C. none of the above.

D. mechanical advantage is less than velocity ratio

E. mechanical advantage is equal to velocity ratio
699. In a singly reinforced beam, if the permissible stress in concrete reaches earlier than that in steel, the beam section is called________________?
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A. Over reinforced section

B. Under-reinforced section

C. Economic section

D. Critical section

700. A pair of smiths tongs is an example of the lever of__________________?
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A. zeioth order

B. second order

C. first order

D. third order

E. fourth order