Mass Transfer Practice Test 9

1. Falling rate period of the batch drying curve = _______ + ___________

2. Find the number of stages.

3. The name of the curve between relative humidity and moisture content is equilibrium moisture curve.

4. Find the equilibrium moisture content.

5. Which of the following process can accelerate leaching?

6. Find the region if the final and the initial moisture content are 40% and 30% (Dry basis) and the critical moisture content is 45%.

7. Find the number of stages.

8. Estimate the heat transfer from a 40 W incandescent bulb at 125 degree Celsius to 25 degree Celsius in quiescent air. Approximate the bulb as a 50 mm diameter sphere. The approximate correlation for the convection coefficient is
Nu = 0.60 (Gr Pr) ^0.25
Where the different parameters are evaluated at the mean film temperature, and characteristics length is the diameter of the sphere

9. The method of drying by conduction through materials are done by _________

10. The given solid will gain or remove moisture till.