Fluid Mechanics and Machinary, Question Paper of B.Tech 4th Semester,Download Previous Years Question Paper 7

Roll No. ......................

Total No. of Questions : 09]

B.Tech. (Sem. – 4th)

FLUID MECHANICS AND MACHINARY

SUBJECT CODE : BTAE-403

MAY-2014

Time : 03 Hours

NOTE:

1.     Section A is compulsory consisting of 10 questions cach carrying 2 marks.

2.     Section B contains five questions each carrying 5 marks. Attempt any 4 questions.

3.     Section C contains 3 question each carrying 10 marks. Attempt any 2 questions.

Section –A

1.     Write briefly:

a.     What is an ideal fluid.

b.     Differentiate between Newtonian fluid and Non-Newtonian fluid.

c.      Define the terms buoyancy and centre of buoyancy.

d.     Differentiate between path line and stream line.

e.      Write the Bernoulli’s equation.

f.       What do you mean by kinematic and dynamic similarity.

g.     What is dimensional homogeneity.

h.     What is a laminar flow.

i.       What is the significance of Darcy equation.

j.       What is a pitot tube.

Section –B

2.     A uniform body of size 3m long x 2m wide x I m deep floats in water. What is the weight if the depth of immersion is 0.8m. also determine the meta centric height.

3.     The stream function for a two dimensional flow is given by Ѱ-2xy calculate the velocity at the point P(2,3). Find the velocity potential function ɸ

4.     State the Bernoulli’s theorem for steady flow of an incompressible fluid. Derive an expression for Bernoulli’s equation from first principle and state the assumptions made.

5.     Define and explain the terms (i) Hydraulic gradient line (ii) Total energy line.

6.     With the help of a neat sketch explain the working of a venturimeter. Derive an expression for the discharge through a venturimeter.

Section –C

7.     State Buckingham’s Pi theorem. The efficiency of a fan depends on density p. dynamic viscosity of the fluid. Angular velocity  diameter D of the rotor and the discharge Q. express  in terms of dimensionless parameters.

8.      

a.     What are the different energy losses in pipes.

b.     An oil of kinematic viscosity 0.4 is flowing through a pipe of diameter 300mm at the rate of 300 liters/s. find the head loss due to friction for a length of 50m of pipe.

9.     Write short note on any two (i) Hydraulic accumulator  (ii) Hydraulic intensifier  (iii) gear pump.