Today we discuss about the topic Multiple choice questions Fluid Mechanics So without wasting of yime let's start,

Multiple choice questions Fluid Mechanics

Multiple choice questions Fluid mechanics

Q.no.1. Fluid is a substance that

(a) cannot be subjected to shear forces

(b) expands until it fills any container

(c) has the same shear stress.at a point regardless of its motion

(d) cannot remain rest under action of any shear force

(e) flows.

Ans: (d)

Q.no.2. Fluid is a substance which offers no resistance to change of

(a) pressure 

(b) flow

(c) shape 

(d) volume

(e) temperature.

Ans: (c)

Q.no.3. Practical fluids

(a) are viscous

(b) possess surface tension

(c) are compressible

(d) possess all the above properties

(e) possess none of the above properties.

Ans: (d)

Q.no.4. In a static fluid

(a) resistance to shear stress is small

(b) fluid pressure is zero

(c) linear deformation is small

(d) only normal stresses can exist

(e) viscosity is nil.

Ans: (d)

Q.no.5. A fluid is said to be ideal, if it is

(a) in compressible

(b) in viscous

(c) viscous and incompressible

(d) in viscous and compressible

(e) in viscous and incompressible.

Ans: (e)

Q.no.6. An ideal flow of any fluid must fulfill the following

(a) Newton's law of motion

(b) Newton's law of viscosity

(c) Pascal' law

(d) Continuity equation

(e) Boundary layer theory.

Ans: (d)

Q.no.7. If no resistance is encountered by displacement, such a substance is known as

(a) fluid 

(b) water

(c) gas 

(d) perfect solid

(e) ideal fluid.

Ans: (e)

Q.no.8. The volumetric change of the fluid caused by a resistance is known as

(a) volumetric strain

(b) volumetric index

(c) compressibility

(d) adhesion 

(e) cohesion.

Ans: (c)

O.no.9. Liquids

(a) cannot be compressed

(b) occupy definite volume

(c) not affected by change in pressure and temperature

(d) are not viscous

(e) none of the above.

Ans: (e)

Q.no.10. Density of water is maximum at

(a) 0°C 

(b) 0°K

(c) 4°C 

(d) 100°C

(e) 20°C.

Ans: (c)

Q.no.11. The value of mass density in kgsec Vm4 for water at 0°C is

(a) 1 

(b) 1000

(c) 100 

(d) 101.9

(e) 91

Ans: (d)

Q.no.12. Property of fluid by which its own molecules are attracted called

(a) adhesion 

(b) cohesion

(c) viscosity 

(d) compressibility

(e) surface tension.

Ans: (b)

Q.no.13. Mercury does not wet glass. This due to property of liquid known as

(a) adhesion 

(b) cohesion

(c) surface tension

(d) viscosity 

(e) compressibility.

Ans: (c)

Q.no.14. The property of a fluid which enables it to resist tensile stress is known as

(a) compressibility

(b) surface tension

(c) cohesion 

(d) adhesion

(e) viscosity.

Ans: (c)

Q.no.15. Property of fluid by which molecules of different kinds of fluids attracted to each 

other is called

(a) adhesion 

(b) cohesion

(c) viscosity 

(d) compressibility

(e) surface tension.

Ans: (a)

Q.no.16. The specific weight of water is 1000 kg/m"

(a) at normal pressure of 760 mm

(b) at 4°C temperature

(c) at mean sea level

(d) all the above 

(e) none of the above.

Ans: (d)

Q.no.17. Specific weight of water in S.I. units is equal to

(a) 1000 N/m3 

(b) 10000 N/m3

(c) 9.81 xlO3 N/m3

(d) 9.81 xlO6N/m3

(e) 9.81 N/m3.

Ans: (c)

Q.no.18. When the flow parameters at any given instant remain same at every point, then flow is 

said to be

(a) quasi static 

(b) steady state

(c) laminar 

(d) uniform

(e) static.

Ans: (d)

Q.no.19. The increase of temperature results in

(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.

Ans: (d)

Q.no.20. Surface tension has the units of

(a) newtons/m 

(b) newtons/m

(c) new tons/m

(d) newtons

(e) newton m.

Ans: (c)

Q.no.21. Kinematic viscosity is dependent upon

(a) pressure 

(b) distance

(c) level 

(d) flow

(e) density.

Ans: (e)

Q.no.22. Units of surface tension are

(a) energy/unit area

(b) distance

(c) both of the above

(d) it has no units

(e) none of the above.

Ans: (c)

Q.no.23. Which of the following meters is not associated with viscosity

(a) Red wood 

(b) Say bolt

(c) Engler 

(d) Orsat

(e) none of the above.

Ans: (d)

Q.no.24. A fluid in equilibrium can't sustain

(a) tensile stress 

(b) compressive stress

(c) shear stress 

(d) bending stress

(e) all of the above.

Ans: (c)

Q.no.25. Viscosity of water in comparison to mercury is

(a) higher 

(b) lower

(c) same

(d) higher/lower depending on temperature

(e) unpredictable.

Ans: (a)

Q.no.26. Which of the following is not a primary dimension of viscosity?

a) Mass

b) Length

c) Time

d) Force

Ans: (d)

Q.no.27. Equation is used to calculate the pressure difference between two points in fluid due to difference in height?

a) Bernoulli's equation

b) Pascal's law

c) Poiseuille's equation

d) Archimedes' principle

Ans: (b)

Q.no.28. Velocity of laminar flow in pipe 

a) Parabolic

b) Uniform

c) Hyperbolic

d) Both (a) and (b)

Ans: (a)

 So in this artcle we learned topic Multiple choice questions Fluid Mechanics hope you understand well.

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