civil engineering MCQs – Page 305

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 Review each marked answer and report any item that may be outdated or unclear.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

6081. The flow in which the particles of a fluid attain such velocities that vary from point to point in magnitude and direction as well as from instant to instant, is known as_________________?
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A. one dimensional flow

B. uniform flow

C. streamline flow

D. steady flow

E. turbulent flow

6082. The speed of sound in a ideal gas varies directly as its ______________?
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A. temperature

B. modulus of elasticity

C. absolute temperature

D. pressure

E. density

6083. To avoid vaporisation in the pipe line, the pipe line over the ridge is laid such that it is not more than_______________?
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A. 5.0 above the hydraulic gradient

B. 6.4 m above the hydraulic gradient

C. none of the above

D. 10.0 m above the hydraulic gradient

E. 2.4 m above the hydraulic gradient

6084. In a forced vortex, the velocity of flow everywhere within the fluid is__________________?
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A. maximum

B. zero

C. non-zero finite

D. minimum

E. unpredictable

6085. A streamline is defined as the line ________________?
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A. along which the pressure drop is uniform

B. which occurs in all flows

C. of equal yelocity in a flow

D. parallel to outer surface of pipe

E. parallel to central axis flow

6086. The equation of continuity holds good when the flow __________________?
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A. velocity is uniform at all the cross sec-tions

B. none of the above

C. all of the above

D. is one dimensional

E. is steady

6087. In order that flow takes place between two points in a pipeline, the differential pressure between thes^ points must be more than_________________?
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A. none of the above

B. frictional force

C. viscosity

D. surface friction

E. all of the above

6088. If 850 kg liquid occupies volume of one cubic meter, men 0.85 represents its_______________?
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A. specific mass

B. specific density

C. specific weight

D. specific gravity

E. none of the above

6089. The flow in which each liquid particle has a definite path and their paths do not cross each other is called____________________?
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A. turbulent flow

B. one dimensional flow

C. streamline flow

D. steady flow

E. uniform flow

6090. Center of pressure on an inclined plane is______________________?
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A. at center of pressure

B. at metacentre

C. above the centroid

D. below the centroid

E. at the centroid

6091. Differential monometer is used to measure _______________________?
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A. velocity in pipes

B. atmospheric pressure

C. very low pressure

D. difference of pressure between two points

E. pressure in pipes, channels etc.

6092. Which of the following instrument can be used for measuring speed of an aeroplane ________________?
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A. hot wire anemometer

B. Orifice plate

C. Venturimeter

D. pitot tube

E. rotameter

6093. A model of a reservior is drained in 4 mts by opening the sluice gate. The model scale is 1: 225. How long should it take to empty the prototype ?
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A. 4 x (225)3/2 minutes

B. 900 minutes

C. 4 x V225 minutes

D. 4 minutes

E. 4 (225)1/3 minutes

6094. Uniform flow occurs when___________________?
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A. the direction and magnitude of the velocity at all points are identical

B. velocity, depth, pressure, etc. change from point to point in the fluid flow

C. the velocity of successive fluid pai-ticles, at any point, is the same at successive periods of time

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

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

6095. For pipes, turbulent flow occurs when Reynolds number is_________________?
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A. less than 2000

B. less than 4000

C. more than 4000

D. none of the above

E. between 2000 and 4000

6096. For measuring flow by a venturimeter, if should be installed in__________________?
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A. inclined line with flow downward

B. inclined line with upward flow

C. vertical line

D. in any direction and in any location

E. horizontal line

6097. The continuity equation is connected with_______________?
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A. compressibility of fluids

B. open channel/pipe flow

C. steady/unsteady flow

D. conservation of mass

E. viscous/unviscous fluids

6098. The pressure in Pascals at a depth of 1 m below the free surface of a body of water will be equal to________________?
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A. 91Pa

B. 9810 Pa

C. 981 Pa

D. 1 Pa

E. 98,100 Pa

6099. Metacentric height is given as the distance between_______________?
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A. the center of gravity of the body andthe meta center

B. center of buoyancy and metacentre

C. the center of gravity of the body and the center of buoyancy

D. the center of gravity of the body and the center of pressure

E. none of the above

6100. The region between the separation streamline and the boundary surface of the solid body is known as_________________?
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A. lift

B. wake

C. drag

D. boundary layer

E. aerofoil section

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