Alagappa University 2007-2nd Sem B.Sc Aviation of Fluid mechanics for Aeronautical science- Question Paper

FLUID MECHANICS

PART A — (5 x three = 15 marks)
ans any 5 of the subsequent ques..

1. discuss surface tension of liquid with an example.
2. describe viscosity. Mention the derivation of its unit.
3. State Bernoulli's theorem.
4. A wooden log of .8m diameter and 4m length is floating in water. obtain the depth of the wooden log in water when the specific gravity of wooden log is .6.
5. describe laminar and turbulent flow.
6. Determine the total pressure and center of pressure on a triangular plate of base 5m and height 4m,when it is immersed vertically in an oil of specific gravity .8.The plate coincide with the free surface of water.
7. describe Reynold's number.

PART B — (5 x three = 15 marks)

8. A venturimeter has an inlet diameter of 25cm.Throat diameter of 10cm.Pressure at inlet is 15N/cm².The vacuum pressure of throat is 25 cm of Hg. Determine flow rate.
or
discuss venturimeter and its principle of working.

9. Water is flowing through a pipe. At the entrance of the pipe diameter is 20cm and the exit of pipe diameter 10cm.Quantity of flow through the pipe is .035m³/s.Entrance is kept 6m above the ground level. Outlet is kept 4m above ground level. At the entrance water pressure is 392.4x10³ N/m².Find the pressure at the outlet.
or
discuss various kinds of fluid flow.

10. discuss various methods of pressure measurement
or
A gauge fitted to a gas cylinder shows 20 KN/m².The atmospheric pressure is 770mm of Hg. compute absolute pressure in metre of water.

11. discuss the legal regulations of pressure.
or
Determine the specific gravity of a fluid having viscosity 0.05poise and kinematic viscosity 0.035 stoke.

12. define
i. gauge pressure
ii. vacuum pressure
iii. Absolute pressure
or
discuss Pitot tube and its working principle.

Earning:   Approval pending.