civil engineering MCQs – Page 48

Practise multiple-choice questions from civil engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

civil engineering Mcqs
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

951. Coulomb friction is the friction between_________________?
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A. two dry surfaces

B. electrically charged particles

C. bodies having relative motion

D. two lubricated surfaces

E. solids and liquids

952. The maximum deflection of a simply supported beam of span L, carrying an isolated load at the centre of the span; flexural rigidity being EI, is______________?
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A. WL3/24EL

B. WL3/8EL

C. WL3/48EL

D. WL3/3EL

953. The radius of gyration of a rectangular section (depth D, width B) from a centroidal axis parallel to the width is__________________?
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A. D

B. D

C. D/2

D. D

954. a uniform circular bar of diameter d and length , which extends by an The deflection of amount under a tensile pull , when it carries the same load at its mid-span, is___________________?
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A. el/3d

B. el/3d

C. el/3d

D. el/2d

955. A three hinged arch is generally hinged at its supports and__________________?
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A. None of these

B. At one quarter span

C. Anywhere in the rib

D. At the crown

956. The stiffness of the close coil helical spring is_________________?
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A. 8D3N/d4n

B. d4N/4D3n

C. d4N/8D3n

D. 4D3N/d4n

957. A rectangular column shown in the given figure carries a load P having eccentricities ex and ey along X and Y axes. The stress at any point (x, y) is_______________?
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A. p [1 + (6ey. y/b) + (6ex. x/ b)]

B. (p/bd) [1 + (12ey. y/d) + (12ex. x/d)]

C. (p/bd) [1 + (ey. y/d) + ( ex. x/d)]

D. (p/bd) [1 + (6ey. y/d) + (6ex. x/b)]

958. A truss containing j joints and m members, will be a simple truss if_________________?
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A. m = 3j 2

B. m = 2j 3

C. j = 2m 3

D. j = 3m 2

959. The load on a spring per unit deflection, is called______________?
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A. Proof resilience

B. Stiffness

C. Proof stress

D. Proof load

960. If a three hinged parabolic arch, (span l, rise h) is carrying a uniformly distributed load w/unit length over the entire span__________________?
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A. All the above

B. Horizontal thrust is wl2/8h

C. S.F. will be zero throughout

D. B.M. will be zero throughout