civil engineering MCQs – Page 292

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 Review each marked answer and report any item that may be outdated or unclear.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
5821. Newtons law of viscosity relates________________?
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A. intensity of pressure and rate of angular deformation

B. shear stress and rate of angular deformation

C. viscosity and rate of angular deformation

D. shear stress, viscosity and temperature

5822. The maximum thickness of boundary layer in a pipe of radius r is____________________?
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A. r/2

B. r

C. 0

D. 2r

5823. The hydraulic grade line is_________________?
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A. always sloping downward in the direction of flow

B. never above the energy grade line

C. always above the centre line of pipe

D. all of the above

5824. The point in the immersed body through which the resultant pressure of the liquid may be taken to act is known as__________________?
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A. center of gravity

B. metacentre

C. center of buoyancy

D. center of pressure
5825. If a vessel containing liquid moves downward with a constant acceleration equal to g then_____________?
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A. there will be vacuum in the liquid

B. the pressure in the liquid mass is greater than hydrostatic pressure

C. the pressure throughout the liquid mass is atmospheric

D. none of the above

5826. The major loss of energy in long pipes is due to_______________?
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A. sudden contraction

B. friction

C. gradual contraction or enlargement

D. sudden enlargement

5827. A floating body is said to be in a state of stable equilibrium_________________?
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A. when the metacentre is below the centre of gravity

B. only when its centre of gravity is below its centre of buoyancy

C. when the metacentre is above the centre of gravity

D. when its metacentric height is zero

5828. 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. less than 1

B. 160

C. between 1 and 100

D. 200

5829. Separation of flow occurs when_________________?
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A. the pressure intensity reaches a minimum

B. the cross-section of a channel is reduced

C. the boundary layer comes to rest

D. all of the above

5830. In a Sutro weir, the discharge is proportional to________________?
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A. H

B. H3/2

C. H5/2

D. H1/2

5831. For laminar flow in circular pipes, the Darcys friction factor f is equal to_________________?
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A. none of the above where R,, is Reynolds number

B. 64/ Re

C. 16/Re

D. 32/ Re

5832. When the velocity distribution is uniform over the cross-section, the correction factor for momentum is__________________?
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A. 3-Apr

B. 1

C. 2

D. 0

5833. Which of the following has highest coefficient of discharge ?
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A. venturimeter

B. sharp edged orifice

C. CipoUetti weir

D. Bordas mouthpiece running full

5834. Two pipe systems are said to be equivalent when_________________?
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A. friction factor and length are same in two systems

B. length of pipe and discharge are same in two systems

C. head loss and discharge are same in two systems

D. length and diameter are same in two systems

5835. The continuity equation pi V,A,= p2V2A2 is based on the following assumption regarding flow of fluid______________?
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A. uniform flow

B. incompressible flow

C. steady flow

D. frictionless flow

5836. Coefficient of discharge for a totally submerged orifice as compared to that for an orifice discharging free is__________________?
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A. nearly half

B. slightly less

C. slightly more

D. equal

5837. If the velocity is zero over half of the cross-sectional area and is uniform over the remaining half, then the momentum correction factor is_______________?
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A. 2

B. 3-Apr

C. 4

D. 1

5838. Least possible value of correction factor for________________?
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A. kinetic energy is 1

B. momentum is zero

C. kinetic energy is zero

D. momentum is 1</strong>

5839. Metacentric height for small values of angle of heel is the distance between the________________?
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A. free surface and centre of buoyancy

B. centre of gravity and metacentre

C. centre of gravity and centre of buoy-ancy

D. centre of buoyancy and metacentre

5840. Which of the following is used to measure the discharge ?
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A. current meter

B. venturimeter

C. hotwire anemometer

D. pitot tube