# Fluid Mechanics Past Papers and important Questions

By Prof. Fazal Rehman Shamil

## Fluid Mechanics Past Papers 1

Paper: Fluid Mechanics

Time Allowed: 3 hours

Examination:

Total Marks:    70, Passing Marks (35)

Q. 1 State whether the statements given below are true or false. (14)
a) The liquid has indefinite volume.
b) Pressure head is included in Bernoulli’s Equation.
c) The specific gravity of water is 50.
d) The drag force is equivalent to specific weight of water.
e) Viscosity is equal to force per unit compression.
g) Orifice is used for measuring pressure.
Q. 2: Prove the Bernoulli equation and also discuss its various applications. (14)

Q. 3: Briefly write about the drag and lift forces, surface tension, compressibility and viscosity. (14)

Q.4: Write a detailed note on pressure and specific weight relationship, differential manometer and piezometer.
(14)

Q. 5: Differentiate between solids and fluids. Also write about the different physical properties of fluids.
(14)

Q. 6: Write about the different forms of energy in a flowing liquid. Also discuss about the free and forced vortex in detail. (14)

Q. 7: Write a note on venturimeter, energy line and hydraulic gradient line. (14)

Q. 8: Write short notes on any two of the following. (7, 7)
a. Dimensionless Numbers.
b. Prototype and Model.
c. Weirs and Notches.

## Fluid Mechanics important questions from Past Papers 2

Paper: Fluid Mechanics

Time Allowed: 3 hours

Examination:

Total Marks:    70, Passing Marks (35)

Q. 1 State whether the statements given below are true or false. (14)
a) The specific gravity of water is 1.
b) The drag force is equivalent to density of water.
c) Viscosity is equal to force per unit area.
e) Pressure head is included in Bernoulli’s Equation.
f) Manometer is used for measuring pressure.
g) The solid has indefinite volume.
Q. 2: Differentiate between solids and fluids. Also write about the different physical properties of fluids. (14)

Q. 3: Briefly write about the specific gravity, surface tension, compressibility and viscosity. (14)

Q. 4: Write a detailed note on pressure and specific weight relationship, differential manometer and borden
gauge.

Q. 5: Prove the Bernoulli equation and also discuss its various applications. (14)

Q. 6: Write about the different forms of energy in a flowing liquid. Also discuss about the free and forced
vortex in detail.

Q. 7: Write a note on dimensionless numbers, energy line and hydraulic gradient line. (14)

Q. 8: Write short notes on any two of the following. (7, 7)
a. Prototype and Model.
b. Venturimeter.
c. Orifice.

## Fluid Mechanics Guess Papers 3

Paper: Fluid Mechanics

Time Allowed: 3 hours

Examination:

Total Marks:    70, Passing Marks (35)

1: State whether the statements given below are true or false.        (14)

• Viscosity is equal to force per unit compression.
• Orifice is used for measuring atmospheric pressure.
• The liquid has definite volume.
• Pressure head is included in Equation of continuity.
• The specific gravity of water is 5.
• The drag force is equivalent to specific weight of water.

2: Briefly write about the drag and lift forces, surface tension, compressibility and viscosity.  (14)

3: Write a note on equilibrium of floating and submerged bodies, weirs and notches in detail.   (14)

4: Prove the Bernoulli equation and also discuss its various applications.                                (14)

5: Write about the different forms of energy in a flowing liquid. Also discuss about the free and forced vortex in detail                                                                                                                                (14)

6: Write a detailed note on pressure and specific weight relationship, differential manometer and Borden Gauge.                                                                                                                                          (14)

7: Differentiate between solids and fluids. Also write about the different physical properties of fluids.                                                                                                                                                                            (14)

8: Write short notes on any two of the following.           (7, 7)

1. Venturimeter.
2. Energy Line and Hydraulic Gradient line.
3. Dimensionless Numbers.

## Fluid Mechanics Past Papers 4

Final Exam Fall Semester 202

Course Title: Fluid Mechanics

Course Code:

Discipline /Program: BS Maths

Time Allowed: 2 Hours

Total Marks: 36

Attempt all questions.

Q.1  (10 MARKS)

Write the short answers of the following

1. Differentiate between Rotational and Irrotational flow fields.
2. Define the Newtonian Law of Viscosity
3. Define the Fluid Rotations
4. Define the Vorticity vector.
5. Differentiate between compressible and Incompressible fluids.

Q.2  (8 MARKS)

a). Define the velocity potential and write its equation in differential form.

b). If u=x and v=-y describes a certain flow field, determine whether or not the equation of continuity is satisfied. Also investigate the types of flow models.

Q.3   (06 MARKS)

Derive the equation of continuity for incompressible fluid.

Q.4  (06 MARKS)

a).Define the vertex line and write its equation in differential form

b). For an incompressible fluid with velocity vector (-ωy, 0, ωx), ω = const

find equations of vertex line. Prof.Fazal Rehman Shamil (Available for Professional Discussions)
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