Name of the College : Noorul Islam College of Engineering
University : Anna University
Degree : B.E
Department : Mechanical Engineering
Subject Code/Name : ME 1202 – Fluid Mechanics & Machineries
Year : 2nd
Semester : 3rd
Document Type : Question Bank
Website : niceindia.com
Download Model/Sample Question Paper :https://www.pdfquestion.in/uploads/niceindia.com/3036-ME1202_-_FLUID_MECHANICS___MACHINERIES.pdf
NICE Fluid Mechanics Question Paper
Module –I (Introduction) :
1. Define fluid? :
A fluid is a substance having a property to flow easily.
Example : liquid, vapour, gas.
Related : Noorul Islam College of Engineering ME1305 Applied Hydrolics & Pneumatics B.E Question Bank : www.pdfquestion.in/3020.html
2. Define fluid mechanics? :
Fluid mechanics is a branch of science which deals with property and behaviour of fluids at rest and in motion.
3.Define fluid statics? :
The study of fluids at rest is called fluid statics .
4.Define fluid kinematics? :
The study of fluids in motion where pressure forces are not considered is called fluid kinematics.
5.What is the SI unit of density ? :
The SI unit of density is kg/m3.
Example : Density of water is 1000 kg/m3.
6.Define specific volume? :
It is the ratio of volume to the mass of a fluid. It is denoted by .Its unit is m3/kg.
= volume of fluid/Mass of fluid
=V/m m3/kg
7. Define specific gravity with respect to density? :
It is the ratio of density of a fluid to density of a standard fluid. It is denoted by s.
i.e, s = density of liquid/density of water
s = density of gas/density of air
8.Define viscosity? :
It is defined as the resisting property of liquid to its flow corresponding to its adjacent layers.
9. Which one of the following has high viscosity, (i) water or (ii) lubricating oil? :
Lubricating oil has high viscosity.
10. Define poise ? :
Poise is the other name of unit of viscosity in CGS system which equals dyne-sec/cm2.
11.Give the classification of fluids? :
Classification of fluids are,
(i) Ideal fluid
(ii) Real fluid
(iii) Newtonian fluid
(iv) Non Newtonian fluid
(v) Ideal plastic fluid.
12. What is real fluid? :
A fluid which has viscosity is a real fluid. All fluid in practice are real fluids.
13.What is non Newtonian fluid? :
A real fluid in which shear stress is not proportional to rate of shear strain.
14.What is compressibility? :
Compressibility is the property of fluid which undergoes change in volume under various pressure conditions.
15. Define compressible fluid? :
A liquid is considered to a compressible fluid only when there is a change in volume of liquid that occurs under large pressure variation .
16. Define compressibility? :
It is also defined of reciprocal of bulk modulus of elasticity (k).
i.e,
compressibility = 1/k .
k= compressive stress / volumetric strain
17.Define capillarity? :
It is the phenomenon of rise or fall of liquid surface relative to out side liquid surface
18.Give the types of gas laws? :
The types of gas laws are,
(i) Boyles law
(ii) Charles law
19. Give some properties of fluid? :
Some properties of fluids are density, specific weight, viscosity, surface tension and capillarity
20. Define fluid dynamics? :
The study of fluid in motion where pressure forces are considered is called as fluid dynamics.
21. What is cause for viscosity?:
The causes for the viscosity are
(i) inter molecular force of cohesion and
(ii) moment of molecules being exchanged .
22. Define ideal fluid?:
A fluid which is incompressible and has no viscosity is called as an ideal fluid . It is an imaginary fluid .
23. Define ideal plastic fluid ?:
A fluid whose shear is more than yield value and its shear stress is directly proportional to shear strain is called as ideal plastic fluid.
24. What is an incompressible fluid?:
A liquid is considered to be incompressible only when there is a change in volume of a liquid that occurs under smaller pressure variation.
25. Give some example of surface tension ?:
Some examples of surface tension are ,
(i) coins when placed over liquid gently floats and gives a spherical shape
(ii) molten lead particles while descending spherical shape
(iii) falling droplet of rain water gives spherical shape
26. Give some examples of capillarity?:
Some examples of capillarity are
1) Rise of shape in tree.
2) Rise of kerosene through wick.
27. Define vapour pressure?:
When evaporation takes place within enclosed surface the partial pressure created on the liquid surface by the vapour molecules is called as vapour pressure
28. Define Boyles law?:
Boyles law for a given quantity of gas constant temperature pressure is inversely proportional to its volume.
It is denoted as
P 1/v at constant t :pv= a constant
V 1/p at constant t
29. Define Avogadro’s law?:
Avogadro’s law states that equal volume of gases at the same temperature and pressure contains equal number of molecules. It is given by pv=nRT Where r gas constant N Avogadro number
30. Define capillarity ?:
It is defined as the phenomenon of rise or fall of liquid surface relative to outside liquid surface.
31. What are the causes for viscosity?:
The causes for viscosity are,
1.inter molecular force of cohesion and
2. moment of molecules being exchanged.
32. What is an incompressible fluid?:
A liquid is considered to be incompressible only when there is a change in volume of a liquid that occurs under smaller pressure variation.