1. Total reflux in a distillation operation requires minimum
2. The amount of steam required per unit quantity of distillate in case of steam distillation will be reduced by
3. The difference of wet bulb temperature and adiabatic saturation temperature of unsaturated mixture of any system is
4. Fenske's equation for determining the minimum number of theoretical stages in distillation column holds good, when the
5. When the temperature and humidity of air is low, we usually use __________ draft cooling tower.
6. __________ columns are used for liquid dispersion in a continuous gas phase.
7. Overall efficiency of the distillation column is
8. On addition of solute in the solvent, the __________ of the solution decreases.
9. Which is the controlling factor for a drum drier?
10. Drying operation under vacuum is carried out to
11. Air initially at 101. 3 kPa and 40°C and with a relative humidity of 50%, is cooled at constant pressure to 30°C. The cooled air has a
12. Separation of two or more components of a liquid solution can not be achieved by
13. Stefan's law describes the mass transfer by
14. At minimum reflux ratio for a given separation
15. Relative humidity is the ratio of the
16. In batch distillation with constant reflux, overhead product composition __________ with time.
17. Psychrometry deals with the properties of gas-vapor mixture. Humidity can be determined by the measurement of the __________ of a fibre.
18. Heat in BTU necessary to increase the temperature of 1 lb of gas and its accompanying vapour by 1°F is called the
19. Sulpha drugs may be effective against diseases caused by?
20. The mass diffusivity, the thermal diffusivity and the eddy momentum diffusivity are same for, NPr = NSc = __________
21. Dew point of a gas-vapour mixture
22. In a packed absorption tower, if the equilibrium and operating lines are both straight lines, then the ratio, HETP/HTUOG __________ the absorption factor.
23. Which of the following plays an important role in problems of simultaneous heat and mass transfer ?
24. In case of an absorber, the operating
25. As the reflux ratio in a distillation coloumn is increased from the minimum, the