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Reg. No. Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
THIRD SEMESTER B.TECH DEGREE EXAMINATION, JULY 2017

Course Code: ME203
Course Name: MECHANICS OF FLUIDS (ME)
Max. Marks: 100 Duration: 3 Hours

PART A
Answer any three questions.
1. (a) Differentiate between Newtonian fluids and Non-Newtonian fluids. (4)
(b) In a stream of glycerine in motion at a certain point the velocity gradient is

0.25 51. If for the fluid, the density is 1268 kg/m? and kinematic viscosity is
6.3x10* m/s. Calculate the shear stress at the point. (6)

2. (a) Differentiate between gauge pressure and absolute pressure. (4)
(b) Determine the total pressure and position of centre of pressure on an isosceles
triangular plate of base Sm and altitude Sm when the plate is immersed vertically in an
oil of specific gravity 0.8. The base of the plate is 1m below the free surface of oil.
(6)

3. (a) Define metacentre and metacentric height. (4) (b)
A solid cylinder of diameter 5m has a height of 4m. Find the metacentric height of the
cylinder when it is floating in water with its axis vertical. The
specific gravity of the cylinder = 0.6. (6)

4. (a) Define streak lines and path lines. (4)
(b) If for a two dimensional potential flow, the velocity potential is ® = x (2y-1),
determine the velocity at the point P(2,3). Determine also the value of stream
function y at the point P. (6)

PART ந
Answer any three questions.

5. (a) Derive Euler’s equation of motion. Obtain Bernoulli’s equation from Euler’s
equation. (6) (b)What are the
assumptions made in deriving Bernoulli’s equation? (4)

6. (a) What is a Venturimeter? Derive an expression for the discharge through a
venturimeter. (6)
(b) An oil of specific gravity 0.8 is flowing through a venturimeter having inlet diameter

20cm and throat diameter 10cm. The oil-mercury differential manometer

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