civil engineering Mcqs
801. The pitch of the main bars in a simply supported slab, should not exceed its effective depth by_____________?
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A. Four times

B. Five times

C. Three times

D. Six times
802. Long and short spans of a two way slab are l and l and load on the slab acting on strips parallel to lx and ly be wx and wy respectively. Accordingy to xRankine Grashoff theory___________________?
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A. (wx/wy) = (ly/lx)4

B. (wx/wy) = (ly/lx)

C. None of these

D. (wx/wy) = (ly/lx)

803. For M 150 mix concrete, according to I.S. specifications, local bond stress, is_________________?
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A. 20 kg/cm2

B. 15 kg/cm2

C. 10 kg/cm 2

D. 5 kg/cm2

804. If the length of a combined footing for two columns l metres apart is L and the projection on the left side of the exterior column is x, then the projection y on the right side of the exterior column, in order to have a uniformly distributed load, is (where is the distance of centre of gravity of column loads______________?
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A. y = L/2 (l + )

B. y = L (l ) )

C. y = L/2 (l )

D. y = L/2 + (l

805. The system in which high tensile alloy steel bars (silica manganese steel) are used as prestressing tendons, is known as________________?
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A. C.C.L. standard system

B. Magnel-Blaton system

C. Freyssinet system

D. Lee-McCall system
806. To ensure that the hogging bending moment at two points of suspension of a pile of length L equals the sagging moment at its centre, the distances of the points of suspension from either end, is________________?
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A. 0.307 L

B. 0.107 L

C. 0.207 L

D. 0.407 L

807. The ratio of the breadth to effective depth of a beam is kept_______________?
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A. 0.7

B. 0.25

C. 0.50

D. 0.75

808. If the bearing capacity of soil is 10 tonnes/cm2 and the projection of plain concrete footing from walls, is a cm, the depth D of footing is_______________?
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A. D = 0.775 a2

B. D = 0.775 a

C. D = 0.0775 a

D. D = 0.775 a
809. The number of treads in a flight is equal to_______________?
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A. Risers minus one

B. Risers plus one

C. Risers in the flight

D. None of these

810. A singly reinforced concrete beam of 25 cm width and 70 cm effective depth is provided with 18.75 cm2 steel. If the modular ratio (m) is 15, the depth of the neutral axis, is_________________?
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A. 25 cm

B. 35 cm

C. 20 cm

D. 30 cm
811. The section of a reinforced beam where most distant concrete fibre in compression and tension in steel attains permissible stresses simultaneously, is called_________________?
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A. All the above

B. Economic section

C. Critical section

D. Balanced section

812. If the modular ratio is , steel ratio is and overall depth of a beam is , the depth of the critical neutral axis of the beam, is___________________?
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A. [(r m)/m] d

B. [m/(m r)] d

C. [m/(m + r)] d

D. [(m + r)/ m] d

813. Forces are called coplanar when all of them acting on body lie in________________?
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A. one plane

B. different points

C. one point

D. perpendicular planes

E. different planes

814. Pick up the incorrect statement from the following?
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A. None of these

B. In the stem of a retaining wall, reinforcement is provided near the earth side

C. In the toe slab of a retaining wall, reinforcement is provided at the bottom of the slab

D. In the heel slab of a retaining wall, reinforcement is provided at the top of the slab

815. According to principle of transmissibility of forces, the effect of a force upon a body is_______________?
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A. none of the above

B. different at different points in its line of action

C. minimum when it acts at the C.G. of the body

D. the same at every point in its line of action

E. maximum when it acts at the center of gravity of a body

816. foundation is assumed as The weight of a_____________?
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A. 10% of wall weight

B. 5% of wall weight

C. 12% of wall weight

D. 7% of wall weight

817. carrying a uniformly distributed load per metre length is suspended at the A pile of length centre and from other two points 0.15 L from either end ; the maximum hogging moment will be_______________?
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A. WL/90

B. WL/30

C. WL/60

D. WL/15

818. If a rectangular pre-stressed beam of an effective span of 5 meters and carrying a total load 3840 kg/m, is designed by the load balancing method, the central dip of the parabolic tendon should be_________________?
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A. 5 cm

B. 15 cm

C. 10 cm

D. 20 cm

819. 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. 10 cm

B. 15 cm

C. 5 cm

D. 20 cm

820. The angle which an inclined plane makes with the horizontal when a body placed on it is about to move down is known as angle of__________________?
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A. repose

B. static friction

C. limiting friction

D. kinematic friction

E. friction

821. The live load to be considered for an accessible roof, is________________?
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A. 200 kg/cm 2

B. 75 kg/m3

C. Nil

D. 150 kg/m 2
822. The design of a retaining wall assumes that the retained earth________________?
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A. Is dry

823. The transverse reinforcements provided at right angles to the main reinforcement_______________?
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A. All the above

B. Distribute the load

C. Resist the shrinkage stress

D. Resist the temperature stresses

824. Side face reinforcement shall be provided in the beam when depth of the web in a beam exceeds_____________?
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A. 120 cm

B. 50 cm

C. 100 cm

D. 75 cm
825. The center of percussion of the homogeneous rod of length L suspended at the top will be__________________?
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A. 3L/4

B. 2L/3

C. L/3

D. L/2

E. 3L/8

826. A force is completely defined when we specify________________?
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A. direction

B. none of the above

C. all of the above

D. magnitude

E. point of application

827. intensity of pressure at a depth h on a block of earth weighing w per unit If p1 is the vertical______________?
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A. wh (1 sin )/(1 + ) )

B. wh (1 tan )/(1 +

C. w (1 cos )/h (1 + sin )

D. wh (1 cos )/(1 + ) p2 is

828. The anchorage value of a hook is assumed sixteen times the diameter of the bar if the angle of the bend, is___________________?
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A. All the above

B. 45

C. 30

D. 40

829. An intermediate T-beam reinforced with two layers of tensile steel with clear cover 13 cm encasted with the floor of a hall 12 metres by 7 metres, is spaced at 3 metres from adjoining beams and if the width of the beam is 20 cm, the breadth of the flange is__________________?
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A. 176 cm

B. 233 cm

C. 300 cm

D. 236 cm

830. Pick up the assumption for the design of a pre-stressed concrete member from the following_______________?
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A. A transverse plane section remains a plane after bending

B. All the above

C. During deformation limits, Hooks law is equally applicable to concrete as well as to steel

D. Variation of stress in reinforcement due to changes in external loading is negligible

831. Dynamic friction as compared to static friction is________________?
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A. more

B. same

C. less

D. may be less of more depending on nature of surfaces and velocity

E. has no correlation

832. The M.I. of hollow circular section about a central axis perpendicular to section as compared to its M.I. about horizontal axis is_________________?
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A. four times

B. same

C. half

D. one fourth

E. double
833. Minimum spacing between horizontal parallel reinforcement of different sizes, should not be less than________________?
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A. Twice the diameter of thinner bar

B. One diameter of thicker bar

C. None of these

D. One diameter of thinner bar

834. If the diameter of the main reinforcement in a slab is 16 mm, the concrete cover to main bars is_____________?
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A. 14 mm

B. 12 mm

C. 16 mm

D. 10 mm

835. In a pre-stressed beam carrying an external load W with a bent tendon is having angle of -stressed load P. The net downward load at the centre is_________________?
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A. W 2P

B. W P

C. W P

D. W 2P
836. If is the sectional area of a pre-stressed rectangular beam provided with a tendon pre -stressed by a force through its centroidal longitudinal axis, the compressive stress in concrete, is_______________?
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A. A/P

B. 2A/P

C. P/A

D. P/2A

837. If a number of forces act simultaneously on a particle, it is possible_________________?
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A. to replace them by a single force through C.G.

B. to replace them by a single force

C. to replace them by a couple and a force

D. not a replace them by a single force

E. to replace them by a couple

838. The C.G. of a right circular solid cone of height h lies at the following distance from the base_____________?
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A. h/2

B. h/4

C. h/6

D. 3/i/5

E. J/3

839. If depth of slab is 10 cm, width of web 30 cm, depth of web 50 cm, centre to centre distance of beams 3 m, effective span of beams 6 m, the effective flange width of the beam, is________________?
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A. 100 cm

B. 150 cm

C. 300 cm

D. 200 cm

840. In the zone of R.C.C. beam where shear stress is less than 5 kg/cm2, nominal reinforcement is provided at a pitch of________________?
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A. One-third lever arm of the section

B. One and half lever arm of the section

C. Lever arm of the section

D. One -half lever arm of the section

841. The algebraic sum of the resolved parts of a number of forces in a given direction is equal to the resolved part of their resultant in the same direction. This is as per the principle of__________________?
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A. balance of force

B. forces

C. independence of forces

D. resolution of forces

E. dependence of forces

842. A raft foundation is provided if its area exceeds the plan area of the building by______________?
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A. 40%

B. 20%

C. 50 %

D. 10%

843. An under-reinforced section means_________________?
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A. Steel provided is insufficient

B. Steel provided on one face only

C. Steel is provided at the underside only

D. Steel will yield first
844. If q is the punching shear resistance per unit area a, is the side of a square footing for a column of side b, carrying a weight W including the weight of the footing, the depth D. of the footing from punching shear consideration, is____________________?
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A. D = W (a b)/4abq

845. In a combined footing for two columns carrying unequal loads, the maximum hogging bending moment occurs at
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A. Less loaded column

B. A point of the maximum shear force

C. A point of zero shear force

D. More loaded column

846. If a suspended body is struck at the centre of percussion, then the pressure on die axis passing through the point of suspension will be___________________?
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A. same as the force applied

B. infinity

C. maximum

D. minimum

E. zero
847. Cantilever retaining walls can safely be used for a height not more than_______________?
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A. 3 m

B. 4 m

C. 5 m

D. 6 m
848. Forces are called concurrent when their lines of action meet in_______________?
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A. one point

B. plane

C. two points

D. different planes

E. perpendicular planes

849. If the maximum dip of a parabolic tendon carrying tension P is h and the effective length of the pre-stressed beam is L, the upward uniform pressure will be________________?
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A. 8hp/l

B. 8hp/ l

C. 8hl/p

D. 8hl/p

850. A flat slab is supported_______________?
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A. On beams and columns

B. On columns monolithically built with slab

C. On columns

D. On beams