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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: ME200
Course Name: FLUID MECHANICS AND MACHINERY
Max. Marks: 100 Duration: 3 Hours
PARTA
Answer any three questions, each carries 10 marks. Marks
1 8) Explain mass density, specific weight, specific gravity and specific volume. (5)

b) A stone weighs 392.4 N in air and 192.2 N in water. Compute the volume and (5)
specific gravityof the stone. Take density of water as 1000 Kg/m’.

2 പ Explain bulk modulus and compressibility. (4)

b) State Newton’s law of viscosity. A thin moving plate is separated from two fixed (6)
plates by two fluids of unequal viscosity ‏1ی‎ & [12 and unequal spacing 01 & 02.

The contact area is A. Determine the force F required to move the plate with a

velocity V.
3 a) State and prove Pascal’s law. (7)
b) Explain Centre of pressure, centre of buoyancy and centre of gravity (3)
4 93) What is metacentric height? Derive the expression for metacentric height (6)
b) Explain the conditions of equilibrium of floating and submerged bodies. (4)
PART छ
Answer any three questions, each carries 10 marks.
5 9) Explain stream line, streak line and path line (4)

b) A pipe of 50 mm diameter is 6 m long and the velocity of flow of water in the (6)
pipe is 2.4 m/s. What loss of head and the corresponding power would be saved if
the central 2 m length of pipe was replaced by 75 mm diameter pipe, the change

of section being sudden? Take friction factor = 0.04 for the pipes of both

diameters.
6 93) Derive Bernoulli equation for fluid motion. State the assumptions. (5)
b) Derive the condition for maximum power transmitted through pipes. (5)

Sketch and explain the development of boundary layer on a flat plate which is 6)

held horizontally in a flow of viscous fluid.

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