## Download Previous Year Diploma Paper of Fluid Mechanics 3rd Sem/Civil/May 2016 Paper

## Fluid Mechanics 3rd Sem/Civil/May 2016 Diploma Question Paper

** SECTION-A**

**Q1. a) Fill in the Blanks. 5×1=5**

#### i. ____________ is a substance which changes its shape according to its surroundings without offering internal resistance.

ii. Notch is generally made up of ________________

iii. Pressure per unit area is called _______________

iv. Atmospheric pressure is also known as ___________

v. Units of discharge are _______________

(B) True/false. 1×5=5

a. Matter exists in three states.

b. Angle of contact is zero degree for water.

c. Bernoulli’s equation is valid for unsteady flow.

d. Line joining total energy at various points along the axis of pipe is called TEL

e. After hydraulic jump, velocity of water decreases.

(C) Multiple choice Questions: 1×5=5

#### 1. Which is the continuous deformation of fluid?

a) Flow b) Liquid c) Solid d) None of the above

2. Poise is the unit of

a) Surface tension b) Viscosity c) Density d) Capillarity

3. Water is said to be

a) Newtonion fluid b) Ideal plastic fluid c )Non newtonion fluid d )Viscous fluid

#### 4. Which of the following substances has highest viscosity?

a) Hydrogen b) Water c) Air d) Mercury

#### 5. Standard value of atmospheric pressure is

a) 760 mm of mercury b). 10.34 mm of water c). 1.01325 bar d). All of the above

## ** SECTION-B**

**Q2. Attempt any five questions. 5×6=30**

####

a. What is the difference between real and ideal fluid.

b. Why piezometers cannot measure large pressures?

c. Give the significance of total pressure.

d. Define the following:-

(a) Atmospheric pressure (b) Gauge pressure (c) Vaccum pressure (d) Absolute pressure

e. What do you mean by rate of flow? What are its SI units?

f. State Bernoulli theorem. Name different practical applications of Bernoulli theorem

g. What are the differences between notch and weir?

h. Explain Reynolds no and its significance?

** SECTION-C**

**Q3. Attempt any three questions.**** 3×10=30 **

#### 1. A triangular lamina having 4m base and 6 m height is immersed vertically in water such that its vertex is below the base. If the centre of pressure is 0.2 m below the centre of the gravity. How far is the base below the water surface?

2. A pipe of 25 cm diameter and 100 m long conveys water at a velocity of 4m/s find the head lost. If the 60 m length of pipe is replaced by a 40 cm diameter pipe leaving equal length on both sides, then determine the saving in head lost. Assume that all changes are sudden.

#### 3. A 4 m tube is inclined at an angle of 20 degrees with the horizontal the tube is placed in such a way that its smaller section of 10 cm diameter is at lower level than the larger section of 40 cm diameter. The flow takes place from smaller to larger section. If the velocity of flowing water is 1.5m/s at the smaller section, determine the difference of pressure between the two sections.

#### 4. A trapezoidal channel has a side slope 1.5 horizontal to vertical. It is to discharge 20 Kliters/s of water with a gradient of 0.5m/km. Find the depth of channel for its best form. Use mannings formula, taking N=0.01

## Fluid Mechanics 3rd Sem/Civil/May 2016 Diploma Question Solved Paper

** SECTION-A**

**Q1. a) Fill in the Blanks. 5×1=5**

#### i. ____________ is a substance which changes its shape according to its surroundings without offering internal resistance.

ii. Notch is generally made up of ________________

iii. Pressure per unit area is called _______________

iv. Atmospheric pressure is also known as ___________

v. Units of discharge are _______________

### (B) True/false. 1×5=5

#### a. Matter exists in three states.

b. Angle of contact is zero degree for water.

c. Bernoulli’s equation is valid for unsteady flow.

d. Line joining total energy at various points along the axis of pipe is called TEL

e. After hydraulic jump, velocity of water decreases.

### (C) Multiple choice Questions: 1×5=5

#### 1. Which is the continuous deformation of fluid?

a) Flow b) Liquid c) Solid d) None of the above

2. Poise is the unit of

a) Surface tension b) Viscosity c) Density d) Capillarity

3. Water is said to be

a) Newtonion fluid b) Ideal plastic fluid c )Non newtonion fluid d )Viscous fluid

#### 4. Which of the following substances has highest viscosity?

a) Hydrogen b) Water c) Air d) Mercury

#### 5. Standard value of atmospheric pressure is

a) 760 mm of mercury b). 10.34 mm of water c). 1.01325 bar d). All of the above

Difference between real and ideal fluid.

Why piezometers cannot measure large pressures

Significance of total pressure.

(a) Atmospheric pressure

(b) Gauge pressure

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(c) Vaccum pressure

(d) Absolute pressure

Rate of flow its SI units

Bernoulli theorem. Name different practical applications of Bernoulli theorem

Differences between notch and weir

Reynolds no and its significance