civil engineering MCQs – Page 304

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 Review each marked answer and report any item that may be outdated or unclear.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

6061. Mach number is significant in___________________?
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A. simultaneous motion through two fluids where there is a surface of dis-continuity, gravity force, and wave making effects, as with ships hulls

B. none of the above

C. full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc.

D. supersonics, as with projectiles and jet propulsion

E. all of fhe above

6062. Poise is the unit of________________?
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A. shear stress in fluids

B. buoyancy

C. surface tension

D. capillarity

E. viscosity

6063. The process of diffusion of one liquid into the other through a semi-permeable membrane is called _______________?
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A. surface tension

B. viscosity

C. diffusivity

D. cohesion

E. osmosis

6064. Center of buoyancy is the___________________?
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A. center of pressure of displaced volume

B. does not exist

C. e.g. of floating body

D. none of the above

E. centroid of the displaced volume of fluid

6065. Metacentre is the point of intersection of _________________________?
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A. all of the above

B. buoyant force and the center line of body

C. none of the above

D. mid point between e.g. and center of buoyancy

E. vertical upward force through e.g. of body and center line of body

6066. The flow which neglects changes in a transverse direction is known as ____________________?
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A. streamline flow

B. one dimensional flow

C. turbulent flow

D. steady flow

E. uniform flow

6067. If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.2 kg/cm, the pressure at a depth of 50 m below the oil surface will be _____________________?
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A. 5 meters of water column

B. 3 meters of water column

C. 2 meters of water column

D. 7 meters of water column

E. 6 meters of water Column

6068. For a floating body to be in stable equilibrium, its metacentre should be_________________ ?
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A. above the center of buoyancy

B. between e.g. and center of pressure

C. above the center of gravity

D. below the center of gravity

E. below the center of buoyancy

6069. The fluid forces considered in the Navier Stokes equation are__________________?
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A. none of the above

B. gravity, pressure and viscous

C. gravity, viscous and turbulent

D. pressure, viscous and turbulent

E. gravity, pressure and turbulent

6070. Rotameter is a device used to measure____________________?
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A. velocity of air

B. velocity of fluid

C. rotation

D. flow

E. absolute pressure

6071. The angle of contact in case of a liquid depends upon____________________?
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A. the nature of the liquid and the solid

B. the material which exists above the free surface of the liquid

C. both of die above

D. any one of the above

E. none of die above

6072. The total pressure force on a plane area is equal to the area multiplied by the intensity of pressure at the centriod, if __________________?
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A. all of the above

B. the area is inclined

C. the area is horizontal

D. the area is vertical

E. none of the above

6073. Free surface of a liquid behaves like a sheet and tends to contract to smallest possible area due to the_______________?
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A. none of die above

B. force of friction

C. force of adhesion

D. force of diffusion

E. force of cohesion

6074. Pitot tube is used for measurement of__________________?
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A. viscosity

B. velocity

C. pressure

D. dsscharge

E. flow

6075. The conditions for the stable equilibrium of a floating body are_______________?
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A. none of the above is correct

B. the meta-center should lie above the center of gravity

C. the center of buoyancy and the center of gravity must lie on the same vertical line

D. a righting couple should be formed

E. all the above are correct

6076. Steady flow occurs when____________________?
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A. velocity, depth, pressure, etc. change from point to point in the fluid flow

B. the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane

C. the magnitude and direction of the velocity do not change from point to point in the fluid

D. the direction and magnitude of the velocity at all points are identical

E. the velocity of successive fluid par-ticles, at any point, is the same at suc-cessive periods of time

6077. An open vessel of water is accelerated up an inclined plane. The free water surface will___________________?
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A. none of the above

B. be horizontal

C. make an angle in direction of inclination of inclined plane

D. any one of above is possible

E. make an angle in opposite direction to inclination of inclined plane

6078. A ship whose hull length is 100 m is to travel at 10 m/sec. For dynamic similarity, at what velocity should a 1:25 model be towed through water ?
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A. 10 m/sec

B. 2 m/sec

C. 25 m/sec

D. 50 m/sec

E. 250 m/sec

6079. In the case of steady flow of a fluid, the acceleration of any fluid particle is__________________?
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A. constant

B. never zero

C. zero under limiting conditions

D. variable

E. zero

6080. A square surface 3 m x 3 m lies in a vertical line in water pipe its upper edge at vater surface. The hydrostatic force on square surface is __________________?
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A. 30,000 kg

B. 27,000 kg

C. 13,500 kg

D. 18,000 kg

E. 9,000 kg

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