civil engineering Mcqs
851. The breadth of a ribbed slab containing two bars must be between______________?
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A. 6 cm to 7.5 cm

B. 12 cm to 15 cm

C. 8 cm to 10 cm

D. 10 cm to 12 cm

852. If the size of a column is reduced above the floor, the main bars of the columns, are_____________?
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A. Bent inward at the floor level

B. Continued up

C. Stopped just below the floor level and separate lap bars provided

D. All the above
853. A heavy string attached at two ends at same horizontal level and when central dip is very small approaches the following curve___________________?
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A. hyperbola

B. circular arc

C. parabola

D. elliptical

E. catenary

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

B. Sub-grade

C. Foundation soil

D. Both B. and C
855. In a singly reinforced beam, the effective depth is measured from its compression edge to_________________?
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A. Neutral axis of the beam

B. Tensile edge

C. Tensile reinforcement

D. Longitudinal central axis

856. If the shear stress in a R.C.C. beam is_______________?
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A. Equal or less than 5 kg/cm2, no shear reinforcement is provided

857. For stairs spanning l metres longitudinally between supports at the bottom and top of a flight carrying a load w per unit horizontal area, the maximum bending moment per metre width, is_______________?
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A. wl/12

B. wl/8

C. wl/16

D. wl/4

858. If three forces acting in one plane upon a rigid body, keep it in equilibrium, then they must either__________________?
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A. meet in a point

B. be all parallel

C. none of the above

D. all the above are correct

E. at least two of them must meet

859. According to Lamis theorem________________?
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A. if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two

B. three forces acting at a point will be in equilibrium

C. ection by the sides of a triangle, taken in order, they will be in equilibrium

D. if three forces acting upon a particle are represented in magnitude and

E. none of the above

F. three forces acting at a point can be represented by a triangle, each side being proportional to force

860. The co-efficient of friction depends upon________________?
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A. area of contact

B. nature of surfaces

C. ail of the above.

D. A. and B. above

E. shape of the surfaces

861. Based on punching shear consideration, the overall depth of a combined footing under a column A, is_______________?
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A. (Perimeter of column A Safe punching stress)/(Load on column A + Upward pressure Area of the column)

B. None of these

C. (Perimeter of column A Safe punching stress)/(Load on column A Upward pressure Area of the column)

D. (Area of the column A Safe punching stress)/Load on column A

862. For the design of a simply supported T-beam the ratio of the effective span to the overall depth of the beam is limited to______________?
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A. 25

B. 15

C. 20

D. 10

863. The weight of reinforced concrete, is generally taken as______________?
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A. 2500 kg/m3

B. 2200 kg/m3

C. 2400 kg/m3

D. 2300 kg/m3

864. The amount of reinforcement for main bars in a slab, is based upon___________________?
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A. Maximum shear force

B. Minimum shear force

C. Maximum bending moment

D. Minimum bending moment

865. For a continuous floor slab supported on beams, the ratio of end span length and intermediate span length, is____________________?
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A. 0.6

B. 0.9

C. 0.7

D. 0.8

866. 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. Breadth of the rib

B. Centre to centre distance between T-beams

C. Overall thickness of the rib

D. All the above
867. If the diameter of longitudinal bars of a square column is 16 mm, the diameter of lateral ties should not be less than____________________?
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A. 6 mm

B. 5 mm

C. 4 mm

D. 8 mm

868. From a circular plate of diameter 6 cm is cut out a circle whose diameter is a radius of the plate. Find the e.g. of the remainder from the center of circular plate___________________?
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A. 0.25 cm

B. 0.5 cm

C. 2.5 cm

D. 1.0 cm

E. 1.5 cm

869. The advantage of a concrete pile over a timber pile, is_______________?
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A. No decay due to termites

870. High strength concrete is used in pre-stressed member________________?
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A. All the above

B. To provide high bond stresses

C. To overcome bursting stresses at the ends

D. To overcome high bearing stresses developed at the ends

871. Which of the following is the example of lever of first order________________?
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A. none of the above

B. all of the above

C. arm of man

D. pair of clinical tongs

E. pair of scissors

872. A body moves, from rest with a constant acceleration of 5 m per sec. The distance covered in 5 sec is most nearly________________?
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A. 96 m

B. 124 m

C. 62.5 m

D. 38 m

E. 240 m

873. The reinforced concrete beam which has width 25 cm, lever arm 40 cm, shear force 6t/cm2, safe shear stress 5 kg/cm2 and B.M. 24 mt________________?
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A. Is safe in shear

B. Is unsafe in shear

C. Needs redesigning

D. Is over safe in shear

874. If the permissible compressive and tensile stresses in a singly reinforced beam are 50 kg/cm2 and 1400 kg/cm2 respectively and the modular ratio is 18, the percentage area At of the steel required for an economic section, is__________________?
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A. 0.50%

875. The C.G. of a plane lamina will not be at its geometrical centre in the case of a______________?
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A. rectangle

B. equilateral triangle

C. square

D. circle

E. right angled triangle
876. The maximum frictional force which comes into play when a body just begins to slide over another surface is called_____________________?
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A. dynamic friction

B. kinematic friction

C. limiting friction

D. sliding friction

E. rolling friction

877. In actual machines______________?
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A. mechanical advantage is equal to velocity ratio

B. mechanical advantage is unity

C. none of the above

D. mechanical advantage is less than velocity ratio

E. mechanical advantage is greater than velocity ratio

878. The algebraic sum of moments of the forces forming couple about any point in their plane is________________?
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A. equal to the moment of the couple

B. constant

C. both of above are correct

D. both of above are wrong

E. none of the above

879. Which of the following is the locus of a point that moves in such a manner that its distance from a fixed point is equal to its distance from a fixed line multiplied by a constant greater than one________________?
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A. none of the above

B. circle

C. ellipse

D. hyperbola

E. parabola

880. Pick up the true statement from the following?
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A. In the absence of beams, it is easier to install piping

B. Plain ceiling provides the best property diffusing light

C. In the absence of beams, it is easier to paint

D. All the above
881. If the loading on a pre-stressed rectangular beam, is uniformly distributed, the tendon to be provided should be_______________?
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A. Parabolic with convexity downward

B. Straight above centroidal axis

C. Parabolic with convexity upward

D. Straight below centroidal axis

882. The angle of internal friction of soil mass is the angle whose_______________?
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A. None of these

B. Cosine is equal to the ratio of the maximum resistance sliding on any internal inclined plane to the normal pressure acting on the plane

C. Tangent is equal to the rate of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane

D. Sine is equal to the ratio of the maximum resistance to sliding on any internal inclined plane to the normal pressure acting on the plane

883. Coefficient of friction is the__________________?
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A. ratio of limiting friction and normal reaction

B. angle between normal reaction and the resultant of normal reaction and the limiting friction

C. tangent of angle of repose

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

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

884. The C.G. of a solid hemisphere lies on the central radius 3r_______________?
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A. at distance from the plane base 3r

B. at distance from the plane base 3r

C. at distance from the plane base or

D. at distance from the plane base

E. at distance from the plane base 3r

885. If A is the area of the foundation of a retaining wall carrying a load W and retaining earth of weight w per unit volume, the minimum depth (h) of the foundation from the free surface of the earth, is )/(1 + sin )]_________________?
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A. h = (W/Aw) [(1 )/(1 + sin )]

B. h W/Aw) [(1 )/(1 + sin )]

C. h = (W/Aw) [(1

D. h = (W/Aw) [(1 + )/(1 + sin )]

886. For a number of columns constructed in a rcjw, the type of foundation provided, is_______________?
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A. Strip

B. Footing

C. Raft

D. Strap

887. Pick up the incorrect statement from the following. The intensity of horizontal shear stress at the elemental part of a beam section, is directly proportional to__________________?
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A. Moment of the beam section about its neutral axis

B. Area of the section

C. Distance of the C.G. of the area from its neutral axis

D. Shear force

888. Which of the following is not the unit of distance ?
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A. millimeter

B. light year

C. micron

D. milestone

E. angstrom

889. The effective span of a simply supported slab, is_______________?
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A. Distance between the centres of the bearings

B. Clear span plus effective depth of the slab

C. Clear distance between the inner faces of the walls plus twice the thickness of the wall

D. None of these

890. With usual notations the depth of the neutral axis of a balanced section, is given by______________?
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A. t/mc = (d + n)/n

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

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

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

891. 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

892. According to I.S. : 456 specifications, the safe diagonal tensile stress for M 150 grade concrete, is_____________?
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A. 5 kg/cm2

B. 20 kg/cm2

C. 10 kg/cm 2

D. 15 kg/cm2

893. Center of gravity of a solid cone lies on the axis at the height_______________?
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A. one-third of the total height above base

B. one-fourth of the total height above base

C. three-eighth of the total height above the base

D. none of the above

E. one-half of the total height above base

894. If the tendon is placed at an rectangular beam (sectional top edge)________________?
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A. Is decreased by Pe/Z

B. Is increased by PZ/e

C. Remains unchanged

D. Is increased by Pe/Z

895. If the length of a wall on either side of a lintel opening is at least half of its effective span L, the load W carried by the lintel is equivalent to the weight of brickwork contained in an equilateral triangle, producing a maximum bending moment____________________?
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A. WL/6

B. WL/2

C. WL/4

D. WL/8

896. A ribbed slab is provided for______________?
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A. A plain ceiling

B. Acoustic insulation

C. Thermal insulation

D. All the above
897. Center of gravity of a thin hollow cone lies on the axis at a height of________________?
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A. one-third of the total height above base

B. none of the above

C. one-half of the total height above base

D. three-eighth of the total height above the base

E. one-fourth of the total height above base

898. A part of the slab may be considered as the flange of the T-beam if__________________?
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A. Flange has adequate reinforcement transverse to beam

B. It is built integrally with the beam

C. It is effectively bonded together with the beam

D. All the above
899. Design of R.C.C. cantilever beams, is based on the resultant force at______________?
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A. Mid span

B. Fixed end

C. Free end

D. Mid span and fixed support

900. is the pre-stressed force applied to the tendon of a rectangular pre-stressed beam whose area of cross section is and sectional modulus is . The maximum stress in the beam, subjected to a maximum bending moment , is_________________?
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A. f = (P/A) + (Z/M)

B. f = (A/P) + (M/Z)

C. f = (P/A) + (M/6Z)

D. f = (P/A) + (M/Z)