civil engineering MCQs – Page 120

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 Review each marked answer and report any item that may be outdated or unclear.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
5951. Fluid is a substance which offers no resistance to change of_________________?
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A. pressure

B. flow

C. shape

D. volume

E. temperature

5952. Units of surface tension are_________________?
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A. energy/unit area

B. distance

C. both of the above

D. it has no units

E. none of the above

5953. If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be_________________?
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A. unpredictable

B. lower than the surface of liquid

C. none of the above

D. the same as the surface of liquid

E. higher than the surface of liquid

5954. Liquids________________?
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A. occupy definite volume

B. GO are not viscous

C. none of the above

D. cannot be compressed

E. are not affected by change in pressure and temperature

5955. Fluid is a substance that_______________?
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A. has the same shear stress.at a point regardless of its motion

B. flows

C. always expands until it fills any container

D. cannot be subjected to shear forces

E. cannot remain at rest under action of any shear force
5956. A liquid compressed in cylinder has a volume of 0.04 m3 at 50 kg/cm2 and a volume of 0.039 m3 at 150 kg/cm2. The bulk modulus of elasticity of liquid is _________________?
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A. 40 x 105 kg/cm2

B. none of the above

C. 40 x 106 kg/cm2

D. 4000 kg/cm2

E. 400 kg/cm2

5957. Specific weight of water in S.I. units is equal to_________________?
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A. 9.81 N/m3

B. 9.81 xlO3 N/m3

C. 1000 N/m3

D. 9.81 xlO6N/m3

E. 10000 N/m3

5958. Property of a fluid by which molecules of different kinds of fluids are attracted to each other is called________________?
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A. cohesion

B. surface tension

C. viscosity

D. adhesion

E. compressibility

5959. Alcohol is used in manometers because_____________________?
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A. is provides suitable meniscus

B. it has low vapour pressure

C. it is clearly visible

D. it has low surface tension

E. it can provide longer column due to low density
5960. Mercury does not wet glass. This is due to property of liquid known as_________________?
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A. viscosity

B. compressibility

C. adhesion

D. cohesion

E. surface tension
5961. A fluid is said to be ideal, if it is________________?
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A. inviscous

B. incompressible

C. viscous and incompressible

D. inviscous and compressible

E. inviscous and incompressible
5962. The bulk modulus of elasticity __________________?
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A. increases with pressure

B. is large when fluid is more compressible

C. is directly proportional to flow.

D. is independent of pressure and viscosity

E. has the dimensions of 1/pressure

5963. Hot wire anemometer is used to measure_______________?
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A. discharge

B. pressure intensity of gas

C. velocity of gas

D. pressure intensity of liquid

5964. The stress-strain relation of the newtoneon fluid is________________?
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A. inverse type

B. parabolic

C. none of the above

D. linear

E. hyperbolic

5965. Free surface of a liquid tends to contract to the smallest possible area due to force of _________________?
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A. friction

B. surface tension

C. cohesion

D. adhesion

E. viscosity

5966. Viscosity of water in comparison to mercury is ______________________?
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A. same

B. higher

C. higher/lower depending on temperature

D. lower

E. unpredictable.

5967. The tendency of a liquid surface to contract is due to the following property_________________?
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A. cohesion

B. surface tension

C. viscosity

D. elasticity

E. adhesion

5968. Falling drops of water become spheres due to the property of ________________?
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A. compressibility

B. surface tension

C. adhesion

D. viscosity

E. cohesion

5969. The property of a fluid which enables it to resist tensile stress is known as________________?
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A. surface tension

B. cohesion

C. adhesion

D. viscosity.

E. compressibility

5970. The ratio of absolute viscosity to mass density is known as____________________?
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A. viscosity index

B. coefficient of viscosity

C. kinematic viscosity

D. coefficient of compressibility

E. specific viscosity

5971. A piece of metal of specific gravity 13.6 is placed in mercury of specific gravity 13.6, what fraction of it volume is under mercury ?
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A. metal piece will sink to the bottom

B. whole of the metal piece will be immersed with its top surface just at mercury level

C. the metal piece will simply float over the mercury

D. none of the above

E. the metal piece will be immersed in mercury by half

5972. The property of fluid by virtue of which it offers resistance to shear is called____________________?
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A. surface tension

B. adhesion

C. viscosity

D. all of the above

E. cohesion

5973. 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. 2000 kg

B. 1500 kg

C. 1000 kg

D. 4000 kg.

E. 500 kg

5974. Which of the following is dimensionless ________________?
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A. specific speed

B. specific weight

C. specific viscosity

D. specific gravity

E. specific volume

5975. When the flow parameters at any given instant remain same at every point, then flow is said to be____________________?
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A. steady state

B. static.

C. uniform

D. quasi static

E. laminar

5976. Dimensions of surface tension are_________________?
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A. MlLt

B. MlL2T2

C. MlL r2

D. MlLTx

E. MlLT2
5977. The density of water is 1000 kg/m3 at __________________?
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A. 4C D. 20C

B. all temperature

C. 0C

D. 0K

5978. In a static fluid__________________?
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A. only normal stresses can exist

B. fluid pressure is zero

C. linear deformation is small

D. viscosity is nil

E. resistance to shear stress is small

5979. Density of water is maximum at ___________________?
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A. 0C

B. 100C

C. 0K

D. 4C

E. 20C.

5980. The bulk modulus of elasticity with increase in pressure___________________?
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A. increases

B. remains constant

C. decreases

D. unpredictable

E. increases first upto certain limit and then decreases

5981. For very great pressures, viscosity of moss gases and liquids __________________?
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A. decreases

B. shows erratic behaviour

C. increases

D. remains same

E. none of the above.

5982. Kinematic viscosity is dependent upon________________?
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A. density

B. distance

C. pressure

D. level

E. flow

5983. The increase of temperature results in_________________?
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A. increase in viscosity of gas

B. increase in viscosity of liquid

C. decrease in viscosity of gas

D. decrease in viscosity of liquid

E. A. and D. above

5984. Which of the following meters is not associated with viscosity__________________?
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A. none of the above

B. Say bolt

C. Red wood

D. Orsat

E. Engler

5985. The pressure at a point in a fluid will not be same in all the directions when the fluid is________________?
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A. inviscous and moving

B. viscous and moving

C. viscous

D. viscous and static

E. moving

5986. Practical fluids____________________?
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A. possess all the above properties

B. are compressible

C. possess none of the above properties

D. possess surface tension

E. are viscous

5987. An object having 10 kg mass weighs 9.81kg on a spring balance. The value of g at this place is___________________?
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A. 9.75 m/sec2

B. 10m/sec2

C. 9 m/sec .

D. 9.81 m/sec2

E. 10.2/m sec

5988. The resultant upward pressure of the fluid on an immersed body is called_________________?
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A. center of pressure

B. upthrust

C. buoyancy

D. all the above are correct

E. none of above is correct

5989. Which of the following is the unit of kinematic viscosity _________________?
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A. none of the above

B. stoke

C. poise

D. faraday

E. pascal

5990. The volumetric change of the fluid caused by a resistance is known as_________________?
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A. adhesion

B. compressibility

C. cohesion

D. volumetric index

E. volumetric strain

5991. Surface tension _____________________?
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A. is a function of the curvature of the interface

B. is also known as capillarity

C. acts in the plane of the interface normal to any line in the surface

D. decreases with fall in temperature

E. has no units

5992. The units of viscosity are__________________?
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A. kg sec/metre

B. none of the above

C. newton-sec per metre

D. metres2 per sec

E. newton-sec per metre2

5993. Choose the correct relationship_________________?
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A. hydrostaticforce = surface tension x gravity.

B. specific gravity = gravity x density

C. kinematicviscosity = dynamicviscosity x density

D. dynamicviscosity = kinematicviscosity x density

E. gravity = specific gravity x density

5994. For manometer, a better liquid combination is one having______________?
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A. surface tension is no criterion

B. high density and viscosity

C. low density and viscosity

D. lower surface tension

E. higher surface tension
5995. The surface tension of mercury at normal temperature compared to that of water is____________________?
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A. less

B. more

C. more or less depending on size of glass tube

D. none of the above.

E. same

5996. A fluid in equilibrium cant sustain_________________?
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A. compressive stress

B. all of the above

C. bending stress

D. shear stress

E. tensile stress

5997. An ideal flow of any fluid must satisfy ___________________?
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A. continuity equation

B. Bernoullis theorem

C. boundary layer theory

D. Newtons law of viscosity

E. Pascal law

5998. Rain drops are spherical because of____________________?
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A. viscosity

B. atmospheric pressure

C. none of the above

D. air resistance

E. surface tension forces
5999. 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. increase

B. decrease

C. unpredictable

D. remain unaffected

E. may increase or decrease depending on the characteristics of liquid

6000. Which of the following manometer has highest sensitivity __________________?
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A. U-tube with mercury

B. U-tube with water

C. inclined U-tube

D. micro-manometer with water

E. displacement type