Mass Transfer

Question: Moisture in a solid exerting an equilibrium vapour pressure equal to that of the pure liquid at the same temperature is called the __________ moisture. [A]. unbound [B]. critical [C]. free [D]. bound Answer: Option A Explanation: No answer description available for this question.

Question: Moisture in a substance exerting an equilibrium vapour pressure less than that of pure liquid at the same temperature is called the __________ moisture. [A]. bound [B]. unbound [C]. critical [D]. none of these Answer: Option A Explanation: No answer description available for this question.

Question: Calcium ammonium nitrate (a fertiliser) is dried in a __________ dryer. [A]. rotary [B]. vacuum [C]. tunnel [D]. tray Answer: Option A Explanation: No answer description available for this question.

Question: Moisture content of a substance when at equilibrium with a given partial pressure of the vapour is called the __________ moisture. [A]. free [B]. unbound [C]. equilibrium [D]. bound Answer: Option C Explanation: No answer description available for this question.

Question: In paper industry, paper is dried in a __________ dryer. [A]. tunnel [B]. heated cylinder [C]. conveyor [D]. festoon Answer: Option B Explanation: No answer description available for this question.

Question: Detergent solution is dried to a powder in a [A]. spray dryer [B]. spouted bed dryer [C]. tunnel dryer [D]. pan open to atmosphere Answer: Option A Explanation: No answer description available for this question.

Question: Equilibrium-moisture curves of different solids [A]. are different [B]. are same [C]. depend on the humidity of the gas [D]. none of these Answer: Option A Explanation: No answer description available for this question.

Question: Milk is dried usually in a __________ dryer. [A]. freeze [B]. spray [C]. tray [D]. rotary Answer: Option B Explanation: No answer description available for this question.

Question: Critical humidity of a solid salt means the humidity [A]. above which it will always become damp. [B]. below which it will always stay dry. [C]. both (a) and (b). [D]. above Which it will always become dry and below which it will always stay damp. Answer: Option C Explanation: No answer description available…

Question: The caking of crystals can be prevented by [A]. maintaining high critical humidity. [B]. maintaining low critical humidity. [C]. coating the product with inert material. [D]. both (a) and (c) Answer: Option D Explanation: No answer description available for this question.