civil engineering Mcqs
751. An R.C.C. roof slab is designed as a two way slab if________________?
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A. It supports live loads in both directions

B. The ratio of spans in two directions is less than 2

C. The slab is continuous over two supports

D. The slab is discontinuous at edges

752. If T and R are tread and rise respectively of a stair, then_______________?
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A. 2R + T = 30

B. R + 2 T = 60

C. 2R + T = 60

D. R + 2 T = 30

753. The minimum number of main steel bars provided in R.C.C________________?
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A. All the above

B. Rectangular columns is 4

C. Octagonal columns is 8

D. Circular columns is 6

754. The resolved part of the resultant of two forces inclined at an angle 9 in a given direction is equal to__________________?
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A. the difference of the forces multiplied by the cosine of 9

B. the sum of the forces multiplied by the sine of 9

C. the algebraic sum of the resolved parts of the forces in the given direction

D. the sum of the forces multiplied by the tangent of 9

E. the sum of the resolved parts of the forces in the given direction

755. Kinetic friction is the________________?
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A. tangent of angle between normal reac-tion and the resultant of normal reac-tion and the limiting friction

B. the friction force acting when the body is just about to move

C. dynamic friction

D. the friction force acting when the body is in motion

E. ratio of limiting friction and normal reaction

756. After pre-stressing process is completed, a loss of stress is due to______________?
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A. Creep of concrete

B. Shrinkage of concrete

C. All the above

D. Elastic shortening of concrete

757. For normal cases, stiffness of a simply supported beam is satisfied if the ratio of its span to its overall depth does not exceed________________?
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A. 10

B. 15

C. 25

D. 20
758. As the percentage of steel increases________________?
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A. Lever arm decreases

B. Depth of neutral axis increases

C. Lever arm increases

D. Depth of neutral axis decreases

759. A semi-circular disc rests on a horizontal surface with its top flat surface horizontal and circular portion touching down. The coefficient of friction between semi-cricular disc and horizontal surface is i. This disc is to be pulled by a horizontal force applied at one edge and it always remains horizontal. When the disc is about to start moving, its top horizontal force will____________________?
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A. unpredictable

B. slant up towards direction of pull

C. slant down towards direction of pull

D. none of the above

E. remain horizontal

760. Distribution of shear intensity over a rectangular section of a beam, follows_________________?
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A. A circular curve

B. A straight line

C. An elliptical curve

D. A parabolic curve
761. In detennining stresses in frames by methods of sections, the frame is divided into two parts by an imaginary section drawn in such a way as not to cut more than___________________?
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A. four members with unknown forces of the frame

B. four members with two known forces

C. three members with known forces of the frame

D. two members with unknown forces of the frame

E. three members with unknown forces of the frame
762. On an absolutely rigid foundation base, the pressure will________________?
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A. Be zero at the centre of the foundation

B. Be more at the edges of the foundation

C. Not be uniform

D. Be uniform

763. For a circular slab carrying a uniformly distributed load, the ratio of the maximum negative to maximum positive radial moment, is___________________?
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A. 1

B. 2

C. 3

D. 5

764. The modular ratio m of a concrete whose permissible compressive stress is C, may be obtained from the equation.
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A. m = 2800/3C

B. m = 700/3C

C. m = 3500/3C

D. m = 1400/3C

765. A body of weight W on inclined plane of a being pulled up by a horizontal force P will be on the point of motion up the plane when P is equal to___________________?
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A. Wan(a-)

B. W

C. W sin (a + $)

D. Wtana

E. Wtan(a +
766. If the depth of actual neutral axis of a doubly reinforced beam______________?
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A. Is less than the depth of critical neutral axis, the steel in the tensile zone attains its maximum stress earlier

B. Is equal to the depth of critical neutral axis; the concrete and steel attain their maximum stresses simultaneously

C. Is greater than the depth of critical neutral axis, the concrete attains its maximum stress earlier

D. All the above
767. The advantage of reinforced concrete, is due to_______________?
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A. All the above

B. Fire-resisting and durability

C. Monolithic character

D. Economy because of less maintenance cost

768. The stem of a cantilever retaining wall which retains earth level with top is 6 m. If the angle of repose and weight of the soil per cubic metre are 30 and 2000 kg respectively, the effective width of the stem at the bottom, is_______________?
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A. 53.5

B. 51.5

C. 52.5

D. 54.5

769. If longitudinally spanning stairs are casted along with their landings, the maximum bending moment per metre width, is taken as___________________?
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A. wl/4

B. wl/10

C. wl/12

D. wl/8
770. If n = number of members andy = number of joints, then for a perfect frame, n =_______________?
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A. j-2

B. 2/ -4

C. j-l

D. 2/-3

E. /-2

771. Least force required to draw a body up the inclined plane is W sin (plane inclination + friction angle) applied in the direction__________________?
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A. unpredictable

B. vertically

C. along the plane

D. horizontally

E. at an angle equal to the angle of friction to the inclined plane
772. According to the steel beam theory of doubly reinforced beams______________?
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A. Tension is resisted by tension steel

B. All the above

C. Stress in tension steel equals the stress in compression steel

D. Compression is resisted by compression steel

773. On piles, the drop must be at least_______________?
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A. 120 cm

B. 140 cm

C. 80 cm

D. 100 cm

774. D Alemberts principle is used for___________________?
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A. designing safe structures

B. determining stresses in the truss

C. reducing the problem of kinetics to equivalent statics problem

D. stability of floating bodies

E. solving kinematic problems

775. The effective width of a column strip of a flat slab, is_______________?
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A. One-fourth the width of the panel

B. Diameter of the column

C. Half the width of the panel

D. Radius of the column

776. Design of R.C.C. simply supported beams carrying U.D.L. is based on the resultant B.M. at________________?
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A. Supports

B. Quarter span

C. Mid span

D. Every section

777. The centre of percussion of a solid cylinder of radius r resting on a horizontal plane will be______________?
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A. 2r/3

B. 3r/2

C. r/2

D. 3r/A

E. r/A

778. The radius of a bar bend to form a hook, should not be less than_______________?
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A. Four times the diameter

B. Thrice the diameter

C. Five times the diameter

D. Twice the diameter
779. If the ratio of long and short spans of a two way slab with corners held down is r, the actual reduction of B.M. is given by
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A. (5/6) (r/1 + r) M

B. (5/6) (r/1 + r4) M

C. (5/6) (r/1 + r) M

D. (5/6) (r/1 + r3) M

780. For initial estimate for a beam design, the width is assumed__________________?
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A. 1/30th of span

B. 1/25th of span

C. 1/20th of span

D. 1/15th of span

781. The Youngs modulus of elasticity of steel, is__________________?
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A. 275 KN/mm2

B. 200 KN/mm2

C. 250 KN/mm2

D. 150 KN/mm2

782. An R.C.C. column is treated as short column if its slenderness ratio is less than_______________?
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A. 40

B. 30

C. 35

D. 50
783. The angle of repose of a soil is the maximum angle which the outer face of the soil mass makes_______________?
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A. With the perpendicular to the inclined plane of the soil

B. None of these

C. With the horizontal

D. With the vertical

784. In a combined footing if shear stress exceeds 5 kg/cm2, the nominal stirrups provided are______________?
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A. 10 legged

B. 8 legged

C. 12 legged

D. 6 legged

785. Pick up the correct statement from the following?
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A. Lateral reinforcement stops breaking away of concrete cover, due to buckling

B. All the above

C. Lateral reinforcement prevents the shearing of concrete on diagonal plane

D. Lateral reinforcement in R.C.C. columns is provided to prevent the longitudinal reinforcement from buckling

786. A continuous beam shall be deemed to be a deep beam if the ratio of effective span to overall depth, is______________?
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A. 2

B. Less than 2.5

C. 2.5

D. Less than 2

787. The maximum ratio of span to depth of a slab simply supported and spanning in two directions, is_________________?
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A. 30

B. 35

C. 40

D. 25

788. In a singly reinforced beam____________?
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A. Elastic moduli for concrete and steel have different values within the limits of deformation of the beam

B. Steel possesses initial stresses when embedded in concrete

C. Compression is borne entirely by concrete

D. Plane sections transverse to the centre line of the beam before bending remain plane after bending
789. Bottom bars under the columns are extended into the interior of the footing slab to a distance greater than____________?
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A. 42 diameters from the inner edge of the column

B. 42 diameters from the centre of the column

C. 42 diameters from the outer edge of the column

D. 24 diameters from the centre of the column

790. If rain is falling in the opposite direction of the movement of a pedestrain, he has to hold his umbrella_________________?
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A. more inclined when moving

B. more inclined when standing

C. none of the above

D. less inclined when moving

E. less inclined when standing
791. Which of the following is not the unit of work, energy and heat ?
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A. kg m

B. kcal

C. hp

D. kWhr

E. hp hr

792. In a doubly-reinforced beam if and the effective depth and is depth of critical neutral axis, the following relationship holds good______________?
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A. (t + c)/n = (d + n)/n

B. (m + c)/t = n/(d + n)

C. mc/t = n/(d n)

D. mc/t = (d n)/t

793. The thickness of base slab of a retaining wall generally provided, is_____________?
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A. One fourth of the width of the steam at the bottom

B. Width of the stem at the bottom

C. One half of the width of the stem at the bottom

D. One -third of the width of the stem at the bottom

794. An R.C.C. column is treated as long if its slenderness ratio is greater than____________?
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A. 50

B. 40

C. 30

D. 35

795. A pre-stressed concrete member__________________?
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A. Possesses internal stresses

B. Is stressed after casting

C. Is made of reinforced concrete

D. Is made of concrete

796. The necessary condition for forces to be in equilibrium is that these should be_______________?
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A. coplanar

B. meet at one point ;

C. both A. and B. above

D. all be equal

E. something else

797. The thickness of the topping of a ribbed slab, varies between________________?
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A. 3 cm to 5 cm

B. 12 cm to 15 cm

C. 5 cm to 8 cm

D. 8 cm to 10 cm

798. In favourable circumstances a 15 cm concrete cube after 28 days, attains a maximum crushing strength______________?
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A. 100 kg/cm2

B. 300 kg/cm2

C. 200 kg/cm2

D. 400 kg/cm2
799. The maximum area of tension reinforcement in beams shall not exceed_______________?
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A. 0.15%

B. 1%

C. 1.50%

D. 4 %
800. If p1 and P2 are effective lateral loadings at the bottom and top exerted by a level earth subjected to a super-load on the vertical face of height h of a retaining wall, the horizontal pressure p per unit length of the wall, is____________________?
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A. [( )/2] h

B. [( + )/2] h

C. ( h

D. [( + )/4] h