civil engineering Mcqs
4651. If the sides of a slab simply supported on edges and spanning in two directions are equal, the maximum bending moment is multiplied by_________________?
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A. 0.5

B. 0.4

C. 0.2

D. 0.3

4652. A foundation is called shallow if its depth, is________________?
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A. Equal to its width

B. One-fourth of its width

C. Half of its width

D. Three-fourth of its width

4653. 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. 54.5

B. 53.5

C. 51.5

D. 52.5

4654. The maximum ratio of span to depth of a slab simply supported and spanning in two directions, is_________________?
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A. 35

B. 25

C. 40

D. 30

4655. The design of a retaining wall assumes that the retained earth________________?
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A. Is dry

4656. On an absolutely rigid foundation base, the pressure will________________?
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A. Be zero at the centre of the foundation

B. Be uniform

C. Be more at the edges of the foundation

D. Not be uniform
4657. If Sb, is the average bond stress on a bar of diameter subjected to maximum stress , the length of the embedment is given by_____________?
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A. l = dt/3Sb

B. l = dt/2Sb

C. l = dt/Sb

D. l = dt/4Sb
4658. Piles are usually driven by________________?
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A. Diesel operated hammer

B. Single acting steam hammer

C. Drop hammer

D. All the above
4659. If T and R are tread and rise respectively of a stair, then_______________?
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A. R + 2 T = 60

B. 2R + T = 60

C. R + 2 T = 30

D. 2R + T = 30

4660. 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. 0.207 L

B. 0.407 L

C. 0.107 L

D. 0.307 L

4661. If a bent tendon is required to balance a concentrated load W at the centre of the span L, the central dip h must be at least________________?
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A. WL/3P

B. WL /P

C. WL/2P

D. WL/4P
4662. If Ac, Asc and A are areas of concrete, longitudinal steel and section of a R.C.C. column and m and c are the modular ratio and maximum stress in the configuration of concrete, the strength of column is______________?
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A. cAc + m cAsc

B. All the above

C. c[A + (m 1)ASC]

D. c(A Asc) + m cAsc

4663. 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. 20 cm

C. 30 cm

D. 35 cm

4664. If W is total load per unit area on a panel, D is the diameter of the column head, L is the span in two directions, then the sum of the maximum positive bending moment and average of the negative bending moment for the design of the span of a square flat slab, should not be less than________________?
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A. WL/12 (L D/3)

B. WL/10 (L + 2D/3)

C. WL/12 (L 2D/3)

D. WL/10 (L 2D/3)
4665. The horizontal portion of a step in a stairs case, is known as_________________?
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A. Flight

B. Tread

C. Rise

D. Winder

4666. If permissible working stresses in steel and concrete are respectively 1400 kg/cm2 and 80 kg/cm2 and modular ratio is 18, in a beam reinforced in tension side and of width 30 cm and having effective depth 46 cm, the lever arms of the section, is______________?
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A. 37 cm

4667. 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. 3.5 m

B. 4.0 m

C. 4.5 m

D. 3.0 m

4668. 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 + r4) M

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

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

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

4669. A foundation rests on_______________?
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A. Base of the foundation

B. Sub-grade

C. Foundation soil

D. Both B. and C
4670. 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. Economic section

B. Critical section

C. All the above

D. Balanced section

4671. 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

4672. A flat slab is supported_______________?
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A. On beams

B. On beams and columns

C. On columns

D. On columns monolithically built with slab
4673. A singly reinforced beam has breadth b, effective depth d, depth of neutral axis n and critical neutral axis n1. If fc and ft are permissible compressive and tensile stresses, the moment to resistance of the beam, is____________________?
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A. n1 (1 n1/3) cbd

B. All the above

C. bn (fc/2) (d n/3)

D. Atft (d n/3)

4674. 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. 15 cm

B. 20 cm

C. 5 cm

D. 10 cm

4675. The width of the flange of a T-beam, which may be considered to act effectively with the rib depends upon____________________?
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A. All the above

B. Breadth of the rib

C. Overall thickness of the rib

D. Centre to centre distance between T-beams

4676. 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. 200 cm

B. 100 cm

C. 300 cm

D. 150 cm
4677. 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. Twice the diameter

D. Five times the diameter

4678. The maximum diameter of a bar used in a ribbed slab, is______________?
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A. 12 mm

B. 20 mm

C. 6 mm

D. 22 mm
4679. effective depth and depth of the neutral axis respectively of a singly reinforced If d and n are the beam, the lever arm of the beam, is_________________?
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A. n

B. d

C. d n/3

D. d + n/3

4680. An R.C.C. column is treated as long if its slenderness ratio is greater than____________?
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A. 35

B. 30

C. 40

D. 50
4681. According to the steel beam theory of doubly reinforced beams______________?
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A. Stress in tension steel equals the stress in compression steel

B. Tension is resisted by tension steel

C. Compression is resisted by compression steel

D. All the above
4682. 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. 15 cm

B. 10 cm

C. 20 cm

D. 5 cm

4683. To have pressure wholly compressive under the base of a retaining wall of width b, the resultant of the weight of the wall and the pressure exerted by the retained, earth should have eccentricity not more than________________?
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A. b/3

B. b/4

C. b/5

D. b/6
4684. 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

C. Less than 2.5

D. 2.5
4685. If diameter of a reinforcement bar is d, the anchorage value of the hook is_______________?
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A. 12d

B. 4d

C. 16d

D. 8d

4686. 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. 40

B. 35

C. 45

D. 30

4687. 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

4688. 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

4689. If the size of a column is reduced above the floor, the main bars of the columns, are_____________?
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A. Stopped just below the floor level and separate lap bars provided

B. Continued up

C. All the above

D. Bent inward at the floor level

4690. 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. (m + c)/t = n/(d + n)

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

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

D. mc/t = n/(d n)
4691. Pick up the correct statement from the following?
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A. A pile is a slender member which transfers its load by friction

B. A pile is a slender member which transfers the load through its lower end on a strong strata

C. A pile is a cylindrical body of concrete which transfers the load at a depth greater than its width

D. A pile is a slender member which transfers its load to the surrounding soil
4692. 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

4693. If K is a constant depending upon the ratio of the width of the slab to its effective span l, x is the distance of the concentrated load from the nearer support, bw is the width of the area of contact of the concentrated load measured parallel to the supported edge, the effective width of the slab be is_______________?
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A. Kx (1 + x/l) + bw

B. K/x (1 + x/d) + bw

C. Kx (1 x/l) + bw

D. All the above

4694. In a simply supported slab, alternate bars are curtailed at________________?
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A. 1/5th of the span

B. 1/6th of the span

C. 1/4th of the span

D. 1/7th of the span
4695. The diameter of transverse reinforcement of columns should be equal to one-fourth of the diameter of the main steel rods but not less than________________?
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A. 6 mm

B. 4 mm

C. 7 mm

D. 5 mm

4696. foundation is assumed as The weight of a_____________?
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A. 12% of wall weight

B. 7% of wall weight

C. 5% of wall weight

D. 10% of wall weight
4697. The thickness of the topping of a ribbed slab, varies between________________?
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A. 8 cm to 10 cm

B. 3 cm to 5 cm

C. 12 cm to 15 cm

D. 5 cm to 8 cm
4698. A circular slab subjected to external loading, deflects to form a_________________?
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A. Ellipsoid

B. Paraboloid

C. None of these

D. Semi-hemisphere

4699. 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/10

B. wl/4

C. wl/8

D. wl/12

4700. 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/15

D. WL/60