civil engineering Mcqs
6051. Choose the wrong statement?
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A. fluids are capable of flowing

B. fluids conform to the shape of the con-taining vessels

C. when in equilibrium, fluids can sustain shear forces

D. when in equilibrium, fluids cannot sustain tangential forces

E. fluids have some degree of compressibility and offer little resistance to form

6052. Liquids transmit pressure equally in all the directions. This is according to_________________?
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A. Chezys equation

B. Boyles law

C. Newtons formula

D. Pascals law

E. Archimedes principle

6053. The center of gravity of the volume of the liquid displaced by an immersed body is called________________?
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A. none of the above

B. center of gravity

C. center of buoyancy

D. center of pressure

E. meta-center

6054. Dynamic viscosity of most of the gases with rise in temperature___________________?
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A. unpredictable

B. none of the above

C. increases

D. decreases

E. remains unaffected

6055. Choose the wrong statement________________?
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A. Viscosity is expressed as poise, stoke, or saybolt seconds

B. Viscosity of a fluid is that property which determines the amount of its resistance to a shearing force

C. Viscosity of liquids decreases with in-crease in temperature

D. Viscosity is due primarily to interaction between fluid molecules

E. Viscosity of liquids is appreciably affected by change in pressure
6056. In a free vortex motion, the radial component of velocity everywhere is ________________?
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A. non-zero and finite

B. minimum

C. unpredictable

D. maximum

E. zero
6057. During the opening of a valve in a pipe line, the flow is___________________?
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A. unsteady

B. free vortex type

C. laminar

D. steady

E. uniform

6058. The pressure in the air space above an oil (sp. gr. 0.8) surface in a tank is 0.1 kg/cm. The pressure at 2.5 m below the oil surface will be ___________________?
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A. 2 meters of water column

B. 4 m of water column

C. 3.5 meters of water column

D. none of the above

E. 3 meters of water column
6059. Metacentric height is the distance between the metacentre and___________________?
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A. water surface

B. none of the above

C. center of pressure

D. center of gravity

E. center of buoyancy

6060. The total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface being 0.5 m below the water level will be___________________?
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A. 1000 kg

B. 4000 kg

C. 500 kg

D. 2000 kg

E. 1500 kg

6061. The resultant upward pressure of the fluid on an immersed body due to its tendency to uplift the sub-merged body is called___________________?
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A. metacentre

B. buoyancy

C. reaction

D. center of pressure

E. upthrust

6062. 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

6063. Poise is the unit of________________?
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A. shear stress in fluids

B. buoyancy

C. surface tension

D. capillarity

E. viscosity
6064. 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
6065. 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
6066. 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

6067. 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

6068. 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
6069. 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

6070. 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

6071. 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

6072. 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

6073. 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

6074. 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
6075. Pitot tube is used for measurement of__________________?
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A. viscosity

B. velocity

C. pressure

D. dsscharge

E. flow

6076. 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
6077. 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
6078. 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
6079. 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

6080. 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
6081. 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

6082. 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
6083. 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

6084. 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

6085. 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

6086. 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

6087. 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

6088. 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
6089. 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

6090. 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

6091. 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

6092. 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.

6093. 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

6094. 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

6095. 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
6096. 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

6097. 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

6098. 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

6099. 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

6100. 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