civil engineering Mcqs
901. If the effective length of a 32 cm diameter R.C.C. column is 4.40 m, its slenderness ratio, is_______________?
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A. 55

B. 45

C. 50

D. 40

902. Which of the following is not the unit of energy________________?
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A. kg m x (m/sec)2

B. watt hours

C. kg m

D. kcal

E. wattr
903. Total pressure on the vertical face of a retaining wall of height h acts parallel to free surface and from the base at a distance of_____________________?
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A. 2h/3

B. h/2

C. h/3

D. h /4

904. Which is the correct statement about law of polygon of forces ?
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A. if a polygon representing forces acting at a point is closed then forces are in equilibrium

B. if any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon, then the forces are in equilibrium

C. if any number of forces acting at a point can be represented in direction and magnitude by the sides of a polygon taken in order, then the forces are in equilibrium

D. if any number of forces acting at a point can be represented by the sides

E. a polygon taken in order, then the forces are in equilibrium

F. none of the above

905. 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/4P

D. WL/2P

906. For stairs spanning horizontally, the minimum waist provided is________________?
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A. 6 cm

B. 12 cm

C. 4 cm

D. 8 cm

907. The maximum shear stress (q) in concrete of a reinforced cement concrete beam is_____________?
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A. Lever arm/(Shear force Width)

B. Shear force/(Lever arm Width)

C. Width/(Lever arm Shear force)

D. (Shear force Width)/Lever arm

908. In a cantilever retaining wall without a heel slab______________?
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A. Width of the base slab is kept 0.7 time the total height of the wall

B. Base slab is made 10 cm thicker than the stem

C. Thickness of the stem is kept same throughout

D. All the above
909. The diameter of main bars in R.C.C. columns, shall not be less than________________?
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A. 12 mm

B. 6 mm

C. 8 mm

D. 10 mm

910. 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. Atft (d n/3)

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

C. n1 (1 n1/3) cbd

D. All the above
911. The length of the lap in a compression member is kept greater than bar diameter x (Permissible stress in bar / Five times the bond stress) or____________________?
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A. 24 bar diameters

B. 30 bar diameters

C. 18 bar diameters

D. 12 bar diameters

912. Distribution reinforcement in a simply supported slab, is provided to distribute_______________?
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A. Temperature stress

B. All the above

C. Load

D. Shrinkage stress

913. A simply supported beam 6 m long and of effective depth 50 cm, carries a uniformly distributed load 2400 kg/m including its self weight. If the lever arm factor is 0.85 and permissible tensile stress of steel is 1400 kg/cm2, the area of steel required, is___________________?
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A. 17 cm2

B. 16 cm2

C. 15 cm2

D. 14 cm 2

914. If R and T are rise and tread of a stair spanning horizontally, the steps are supported by a wall on one side and by a stringer beam on the other side, the steps are designed as beams of width_______________?
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A. T R

B. R + T

C. 2 + T2)

D. R T

915. Steel beam theory is used for_______________?
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A. Doubly reinforced beams ignoring compressive stress in concrete

B. Steel beams encased in concrete

C. Design of simple steel beams

D. Beams if shear exceeds 4 times allowable shear stress

916. A short column 20 cm 20 cm in section is reinforced with 4 bars whose area of cross section is 20 sq. cm. If permissible compressive stresses in concrete and steel are 40 kg/cm2 and 300 kg/cm2, the Safe load on the column, should not exceed_______________?
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A. 4120 kg

B. 41,200 kg

C. 412,000 kg

D. None of these

917. 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/4Sb

B. l = dt/3Sb

C. l = dt/Sb

D. l = dt/2Sb

918. Which one of the following statements is not correct_________________?
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A. the sine of the angle of repose is equal to coefficient to friction

B. the tangent of the angle of friction is equal to coefficient of friction

C. the tangent of the angle of repose is equal to coefficient of friction

D. none of the above

E. the angle of repose is equal to angle of friction

919. If the permissible compressive stress for a concrete in bending is C kg/m2, the modular ratio is_____________?
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A. 2300/2C

B. 2800/C

C. 2800/3C

D. 2800/C2

920. 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 + n/3

C. d n/3

D. d

921. Effect of a force on a body depends upon________________?
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A. position or line of action

B. direction

C. all of the above

D. magnitude

E. none of the above
922. When trying to turn a key into a lock, following is applied___________________?
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A. non-coplanar forces

B. couple

C. coplanar force

D. lever

E. moment

923. The steel generally used in R.C.C. work, is_________________?
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A. Stainless

B. High tension steel

C. High carbon steel

D. Mild steel
924. The weight of a body is due to____________________?
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A. gravitational force of attraction towards the centre of the earth

B. force of attraction experienced by par-ticles

C. forces experienced by body in atmos-phere

D. centripetal force of earth

E. gravitational pull exerted by the earth

925. [A + (m 1)ASC] known as equivalent concrete area of R.C.C. is given by______________?
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A. Load factor method

B. None of these

C. Modular ratio method

D. Ultimate load method

926. A framed structure is perfect if it contains members equal to________________?
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A. 3n-2

B. n 2

C. 2n-l

D. 2n-3

E. n-l

927. The live load to be considered for an inaccessible roof, is______________?
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A. Nil

B. 150 kg/cm 2

C. 75 kg/m2

D. 200 kg/m2

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

B. cAc + m cAsc

C. c(A Asc) + m cAsc

D. All the above
929. The width of the flange of a T-beam should be less than_________________?
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A. Least of the above

B. Breadth of the rib plus twelve times the thickness of the slab

C. Distance between the centres of T-beam

D. One- third of the effective span of the T -beam

930. By over-reinforcing a beam, the moment of resistance can be increased not more than________________?
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A. 20%

B. 10%

C. 25 %

D. 15%

931. per unit run exerted by the Total pressure on the vertical face of a retaining wall of height retained earth weighing per unit volume, is___________________?
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A. wh [(1 )/2(1 + sin )]

B. wh [(1 )/(1 + sin )]

C. wh [(1 )/3(1 + sin )]

D. wh [(1 )/(1 + sin )]

932. If the average bending stress is 6 kg/cm2 for M 150 grade concrete, the length of embedment of a bar of diameter d according to I.S. 456 specifications, is__________________?
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A. 48 d

B. 58 d

C. 28 d

D. 38 d

933. Which of the following do not have identical dimensions ?
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A. Torque and energy

B. Kinetic energy and potential energy

C. Moment of a force and angular momentum

D. Torque and work

E. Momentum and impulse

934. The minimum head room over a stair must be_______________?
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A. 200 cm

935. Which of the following is used to measure the discharge ?
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A. current meter

B. hotwire anemometer

C. pitot tube

D. venturimeter
936. The ratio of shear stress and shear strain of an elastic material, is________________?
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A. Modulus of Rigidity

B. Shear Modulus

C. Modulus of Elasticity

D. Both A. and B
937. The degree of indeterminacy of the frame in the given figure, is__________________?
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A. Zero

B. 2

C. 1

D. 3
938. A simply supported beam which carries a uniformly distributed load has two equal overhangs. To have maximum B.M. produced in the beam least possible, the ratio of the length of the overhang to the total length of the beam, is_________________?
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A. 0.307

B. 0.508

C. 0.207

D. 0.407

939. The locus of the moment of inertia about inclined axes to the principal axis, is______________?
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A. Parabola

B. Ellipse

C. Straight line

D. Circle

940. parabolic arch of span and rise , is given by The equation of a________________?
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A. y = 3h/l (1 x)

B. y = h/l (1 x )

C. y = 4h/l (1 x)

D. y = 2h/l (1 x)

941. For calculating the allowable stress of long columns known as_________________?
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A. Rankines formula

B. Straight line formula

C. Perrys formula

D. Parabolic formula
942. A concentrated load P is supported by the free end of a quadrantal ring AB whose end B is fixed. The ratio of the vertical to horizontal deflections of the end A, is______________?
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A. /3

B. /6

C. /2

D. /4

943. The Prartdtl mixing length is_________________?
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A. independent of shear stress

B. maximum at the pipe wall

C. zero at the pipe wall

D. none of the above

944. If Q is load factor, S is shape factor and F is factor of safety in elastic design, the following_______________?
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A. Q = S + F

B. Q = S F

C. Q = S F

D. Q = F S

945. A square column carries a load P at the centroid of one of the quarters of the square. If a is the side of the main square, the combined bending stress will be________________?
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A. 2p/a

B. p/a

C. 4p/a

D. 3p/a
946. In which of the following the friction drag is generally larger than pressure drag?
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A. a cylinder

B. an airfoil

C. a circular disc or plate held normal to flow

D. a sphere

947. The maximum deflection due to a load W at the free end of a cantilever of length L and having flexural rigidity EI, is_____________?
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A. WL/2EI

948. The force in BF of the truss shown in given figure, is_______________?
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A. 4.5t compression

B. 4t compression

C. 4.5t tension

D. 4t tension

949. Two pipes of same length and diameters d and 2d respectively are connected in series. The diameter of an equivalent pipe of same length is________________?
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A. greater than 2d

B. less than d

C. between d and 1.5 d

D. between 1.5 d and 2d

950. The continuity equation pi V,A,= p2V2A2 is based on the following assumption regarding flow of fluid______________?
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A. frictionless flow

B. incompressible flow

C. steady flow

D. uniform flow