civil engineering MCQs – Page 152

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 Review each marked answer and report any item that may be outdated or unclear.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

3021. Normal depth in open channel flow is the depth of flow corresponding to_______________?
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A. uniform flow

B. laminar flow

C. unsteady flow

D. critical flow

E. steady flow

3022. 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. streamline flow

C. steady flow

D. uniform flow

E. one dimensional flow

3023. Center of pressure on an inclined plane is______________________?
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A. above the centroid

B. at center of pressure

C. at metacentre

D. below the centroid

E. at the centroid

3024. Principle of similitude forms the basis of__________________?
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A. designing models so that the result can be converted to prototypes

B. hydraulic designs

C. comparing two identical equipments

D. performing acceptance tests

E. comparing similarity between design and actual equipment

3025. In the lever of third order, load W, effort P and fulcrum F are oriented as follows_________________?
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A. F between W and P

B. W between P and F

C. P between W and F

D. none of the above

E. W, P and F all on one side

3026. The vapour pressure over the concave surface is__________________?
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A. none of the above

B. equal to the vapour pressure over the plane surface

C. zero

D. greater than the vapour pressure over the plane surface

E. less man the vapour pressure over the plane surface

3027. 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. force of cohesion

B. force of friction

C. none of die above

D. force of diffusion

E. force of adhesion

3028. The rise or depression of liquid in a tube due to surface tension wim increase in size of tube will_______________?
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A. may increase or decrease depending on the characteristics of liquid

B. increase

C. remain unaffected

D. decrease

E. unpredictable

3029. 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 (225)1/3 minutes

B. 4 x V225 minutes

C. 4 minutes

D. 900 minutes

E. 4 x (225)3/2 minutes

3030. Choose the wrong statement?
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A. any weight, floating or immersed in a liquid, is acted upon by a buoyant force

B. Relative density of liquids can be determined by means of the depth of flotation of hydrometer

C. Buoyant force is equal to the weight of the liquid displaced

D. The point through which buoyant force acts, is called the center of buoyancy

E. Center of buoyancy is located above the center of gravity of the displaced liquid v

3031. In the case of steady flow of a fluid, the acceleration of any fluid particle is__________________?
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A. variable

B. zero under limiting conditions

C. never zero

D. constant

E. zero

3032. 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. 250 m/sec

B. 25 m/sec

C. 2 m/sec

D. 10 m/sec

E. 50 m/sec

3033. A piece weighing 3 kg in air was found to weigh 2.5 kg when submerged in water. Its specific gravity is__________________?
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A. 5

B. 6

C. 7

D. 1

3034. Newtons law of viscosity is a relationship between________________?
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A. shear stress, pressure and rate of angular distortion

B. shear stress anctthejiate of angular distortion

C. pressure, velocity and viscosity

D. shear stress, velocity and viscosity

E. shear stress and viscosity

3035. According to Bernoullis equation for steady ideal fluid flow_______________?
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A. velocity and pressure are inversely proportional

B. none of the above

C. principle of conservation of mass holds

D. total energy is constant throughout

E. the energy is constant along a stream-line but may vary across streamlines

3036. According to the principle of buoyancy a body totally or partially immersed in a fluid will be lifted up by a force equal to __________________?
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A. the weight of the body

B. weight of body plus the weight of the fluid displaced hy the body

C. less than the weight of the body

D. more than the weight of the body

E. weight of the fluid displaced by the body

3037. Flow of water in a pipe about 3 meters in diameter can be measured by_________________?
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A. rotameter

B. orifice plate

C. nozzle

D. pitot tube

E. venturi

3038. General energy equation holds for_________________?
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A. turbulent flow

B. steady flow

C. non-uniform flow

D. laminar flow

E. all of the above

3039. An ideal flow of any fluid must satisfy ___________________?
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A. boundary layer theory

B. Pascal law

C. continuity equation

D. Newtons law of viscosity

E. Bernoullis theorem

3040. Steady 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 magnitude and direction of the velocity do not change from point to point in the fluid

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

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

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