Fluid Mechanics Quiz: 2; Date: 08/08/2014

1. What is energy displacement thickness?
2. How shear stress varies when a fluid flow through a pipeline?
3. Uses of Hagen-Poiseuille’s equation.
4. What is the critical Reynolds number?
5. Difference between the smooth pipe and rough pipe.
6. What is hydraulic diameter?
7. Give an example for pipes in Parallel?
8. What happens to friction factor at very high Reynold’s number?
9. What is Blasius equation?
10. What is vena-contracta?
11. Oil of viscosity µ is placed between two plates. The plates are moved in same direction with velocity V. Sketch the velocity profile between the plates.
12. During sudden contraction, locate the region where the loss will occur.
13. A piping system involves two pipes of different diameter pipes. Both pipes are having the same length; same materials are connected in parallel. How will you compare the flow rate and pressure drops?