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# Chemical Engineering - Fluid Mechanics

### Exercise

"Time and tide wait for none."
- Alexander Pope
1.

Cocks are used to control

 A. water B. any liquid C. solids D. none of these

2.

If in a flow field, between any two points, then the flow must be

3.

The dimension of surface tension is

 A. ML-2 B. MT-2 C. MLT-2 D. ML-2T

4.

Pick out the correct statement.

 A. Fanning friction factor is inversely proportional to Reynolds number always. B. The property of a randomly packed bed (with raschig rings) is given by the ratio of the total volume to the volume of voids in the bed. C. Mach number in an incompressible fluid is always unity. D. Mach number is given by the ratio of the speed of the fluid to that of sound in the fluid under conditions of flow.

5.

The friction factor is

 A. always inversely proportional to the Reynolds number. B. not dimensionless. C. not dependent on the roughness of the pipe. D. none of these.