civil engineering Mcqs
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

961. If a sphere of diameter 1 cm falls in castor oil of kinematic viscosity 10 stokes, with a terminal velocity of 1.5 cm/sec, the coefficient of drag on the sphere is________________?
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A. between 1 and 100

B. 160

C. less than 1

D. 200

962. Beams composed of more than one material, rigidly connected together so as to behave as one piece, are known as________________?
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A. Indeterminate beams

B. Determinate beams

C. Composite beams

D. Compound beams

963. Hot wire anemometer is used to measure_______________?
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A. pressure intensity of gas

B. pressure intensity of liquid

C. discharge

D. velocity of gas
964. The ratio of the deflections of the free end of a cantilever due to an isolated load at 1/3rd and 2/3rd of the span, is________________?
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A. 7-Mar

B. 7-Jan

C. 5-Feb

D. 2/7
965. The ratio of maximum shear stress to average shear stress of a circular beam, is________________?
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A. 4-Mar

B. 3-Feb

C. 2-Mar

D. 4/3
966. The horse power transmitted through a pipe is maximum when the ratio of loss of head due to friction and total head supplied is________________?
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A. 3-Feb

B. 4-Jan

C. 2-Jan

D. 1/3
967. For a strongest rectangular beam cut from a circular log, the ratio of the width and depth, is________________?
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A. 0.707

B. 0.505

C. 0.303

D. 0.404

968. According to principle of moments_________________?
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A. if a system of coplanar forces is in equilibrium, then their algebraic sum is zero

B. none of the above

C. if a system of coplanar forces is in equilibrium, then the algebraic sum of their moments about any point in their plane is zero

D. positive and negative couples can be balanced

E. the algebraic sum of the moments of any two forces about any point is equal to moment of theiwesultant about the same point

969. The ratio of limiting friction and normal reaction is known as_______________?
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A. coefficient of friction

B. angle of repose

C. sliding friction

D. friction resistance

E. angle of friction

970. The hydraulic grade line is_________________?
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A. never above the energy grade line

B. all of the above

C. always above the centre line of pipe

D. always sloping downward in the direction of flow

971. If a solid shaft (diameter 20 cm, length 400 cm, N = 0.8 105 N/mm2) when subjected to a twisting moment, produces maximum shear stress of 50 N/mm 2, the angle of twist in radians, is_________________?
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A. 0.001

B. 0.0025

C. 0.003

D. 0.002

972. For calculating the permissible stress 0 y /[(1 + a(l/r)] is the empirical formula, known as__________________?
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A. Perrys formula

B. Rankines formula

C. Straight line formula

D. Parabolic formula

973. A load of 1960 N is raised at the end of a steel wire. The minimum diameter of the wire so that stress in the wire does not exceed 100 N/mm2 is________________?
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A. 5.0 mm

B. 4.0 mm

C. 4.5 mm

D. 5.5 mm

974. 0. At its elastic limit, the following statement is true, 0/E__________________?
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A. Strain energy = 0

B. All the above

C. Strain is equal to

D. Maximum shear stress = /2

E. /2E volume

975. A compound truss may be formed by connecting two simple rigid frames, by_________________?
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A. Three bars intersecting at a point

B. Two bars

C. Three parallel bars

D. Three bars
976. For beams breadth is constant__________________?
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A. Depth d 3

B. Depth d

C. Depth d 1/M

D. Depth d M

977. A steel plate d b is sandwiched rigidly between two timber joists each D B/2 in section. The steel will be (where Youngs modulus of steel is m times that of the timber)_________________?
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A. BD + mbd3)/4D]

B. BD + mbd)/4D]

C. BD3 + mbd3)/6D]

D. BD + mbd)/6D]

978. The ratio of the stresses produced by a suddenly applied load and by a gradually applied load on a bar, is__________________?
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A. 1

B. 4-Jan

C. 2-Jan

D. 2
979. The locus of the end point of the resultant of the normal and tangential components of the stress on an inclined plane, is________________?
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A. Straight line

B. Circle

C. Parabola

D. Ellipse
980. For laminar flow in circular pipes, the Darcys friction factor f is equal to_________________?
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A. 16/Re

B. 64/ Re

C. 32/ Re

D. none of the above where R,, is Reynolds number

981. A simply supported beam carries varying load from zero at one end and w at the other end. If the length of the beam is a, the maximum bending moment will be_______________?
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A. wa

B. wa

C. wa/27

D. wa/27

982. A heavy ladder resting on floor and against a vertical wall may not be in equilibrium, if______________?
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A. the floor is smooth, the wall is rough

B. the floor is rough, the wall is smooth

C. the floor and wall both are smooth surfaces

D. the floor and wall both are rough sur-faces

E. will be in equilibrium under all condi-tions

983. The forces acting normally on the cross section of a bar shown in the given figure introduce_______________?
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A. Tensile stress

B. Shear stress

C. Compressive stress

D. None of these

984. When time of closure tc = L/v0 (where L is length of pipe and v0 is speed of pressure wavE., the portion of pipe length subjected to maximum head is__________________?
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A. L/2

B. L

C. L/3

D. L/4
985. In the truss, the force in the member AC is_______________?
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A. t compressive

B. 8.75 t tensile

C. 6.25 t compressive

D. t tensile

986. According to law of triangle of forces______________?
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A. three forces acting at a point can be represented by a triangle, each side being proportional to force

B. none of the above

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

D. if three forces acting upon a patticle are represented in magnitude and direction by the sides of a triangle, taken in order, they will be in equilibrium

E. if three forces acting at a point are in equilibrium, each force is proportional to the sine of the angle between the other two

987. The length of a pipe is 1 km and its diameter is 20 cm. If the diameter of an equivalent pipe is 40 cm, then its length is_____________________?
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A. 4 km

B. 32 km

C. 8 km

D. 20 km

988. A bar L metre long and having its area of cross-section A, is subjected to a gradually applied tensile load W. The strain energy stored in the bar is_________________?
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A. WL/2AE

B. WL/2AE

C. WL/AE

D. WL/AE

989. The effort required to lift a load W on a screw jack with helix angle a and angle of friction <j) is equal to_________________?
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A. Wtan(a-)

B. Wsin(a + )

C. W (sin a + cos )

D. Wcos(a + )

E. Wtan(a + )
990. The discharge through a V- notch varies as______________?
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A. H5/2

B. H54 where H is head

C. H1/2

D. H32

991. If a concrete column 200 200 mm in cross-section is reinforced with four steel bars of 1200 mm2 total cross-sectional area. Calculate the safe load for the column if permissible stress in concrete is 5 N/mm2 and Es is 15 Ec________________?
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A. 274 MN

B. 264 MN

C. 284 MN

D. 294 MN

992. Which of the following is not the unit of pressure ?
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A. ata

B. newton

C. atmosphere

D. kg/cm

E. mm of wcl

993. For the close coil helical spring of the maximum deflection is__________________?
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A. 2WD3n/d4N

B. 8WD3n/d4N

C. WD3n/d4N

D. 4WD3n/d4N

994. A rolled steel joist is simply supported at its ends and carries a uniformly distributed load which causes a maximum deflection of 10 mm and slope at the ends of 0.002 radian. The length of the joist will be________________?
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A. 16 m

B. 14 m

C. 10 m

D. 12 m

995. A particle inside a hollow sphere of radius r, having coefficient of friction -rr can rest upto height of__________________?
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A. r/%

B. 0.134 r

C. r/2

D. 3r/8

E. r/A

996. The vertical reaction for the arch is________________?
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A. wl/a

B. wa/2l

C. wa/2l

D. wa/l

997. In the truss shown in given figure, the force in member BD is______________?
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A. 100 t compressive

B. Indeterminate

C. 100 t tensile

D. Zero

998. Pick up the correct statement from the following_______________?
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A. All the above

B. The structural member subjected to compression and whose dimensions are small as

C. compared to its length, is called a stmt

D. Deflection in lateral direction of a long column, is generally known as buckling

E. vertical compression members are generally known as columns or stanchions

999. Pick up the correct statement from the following?
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A. All the above

B. For a uniformly distributed load, B.M. curve is a parabola

C. For a load varying linearly, the shear force curve is a parabola

D. For a uniformly distributed load, the shear force varies linearly

1000. length of a column of length L, having one end fixed and other end hinged, is The equivalent_____________?
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A. 2 L

B. L

C. L/2

D. L