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Reg No.: Name:
APJ ABDUL KALAM TECHNOLOGICAL UNIVERSITY
Third Semester B.Tech Degree (S,FE) Examination December 2020 (2015 Scheme)

Course Code: ME203
Course Name: MECHANICS OF FLUIDS
Max. Marks: 100 Duration: 3 Hours
PARTA
Answer any three full questions, each carries 10 marks. Marks
1 a) Distinguish between the following: (6)

i) Ideal and Real fluid
ii) Newtonian and Non-Newtonian fluid
iii) Poise and Stokes

b) A hydraulic press has a ram of 30cm diameter and a plunger of 4.5cm diameter. (4)
Find the weight lifted by the hydraulic press when the force applied at the
plunger is 500 14.

2 Derive the expression for the force exerted on a submerged vertical plane (10)
surface by the static liquid and locate the position of centre of pressure.

3 ஐ Derive the expression for continuity equation in 3-D. (8)

b) Differentiate between i) steady and unsteady ii) uniform and non-uniform flows. (2)
(one point)

+ In a two-dimensional incompressible flow, the fluid velocity components are (10)
given by u = x-4y and v = -y-4x. Show that velocity potential exists and
determine its form. Also find the velocity at point (1, 2).

PART ‏تا‎
‎Answer any three full questions, each carries 10 marks.

5 93) State the use of an orifice meter. Derive an expression for the rate of flow (6)
through orifice meter.

b) An orifice meter with orifice diameter 15 cm is inserted in a pipe of 30 cm
diameter. The pressure difference measured by a mercury oil differential (4)
manometer on the two sides of the orifice meter gives a reading of 50 cm of
mercury. Find the rate of flow of oil of sp.gr. 0.9 when the coefficient of

discharge of the orifice meter = 0.64.

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