Question

______ type of drying uses either by heat and subsequent vacuum (to increase the pressure difference between internal and external environment) or a combination of vacuuming and steaming.

• A. Puff drying
• B. Cabinet drying
• C. Fluidized bed drying
• D. Hot air oven drying

Hint:

Remember that puff drying can be enhanced with vacuum conditions to improve its effectiveness in moisture removal.

Answer 1

The Correct Option is A

Step 1: Concept
Vacuum Drying and its Applications

Step 2: Meaning
Vacuum drying is a method used to remove moisture from materials by applying a vacuum, which reduces the boiling point of water. This technique can be combined with other methods like steaming or heat application.

Step 3: Analysis
- Option A: Puff Drying - This process involves rapid heating and expansion of food particles, often in a fluidized bed. It does not typically involve vacuuming. - Option B: Cabinet Drying - This is a conventional method where air is circulated over the material to be dried at ambient conditions. No mention of vacuum or steaming. - Option C: Fluidized Bed Drying - This technique uses a stream of gas to suspend particles, allowing for efficient drying but does not inherently involve vacuuming or steaming. - Option D: Hot Air Oven Drying - This method relies on circulating hot air around the material. It is not associated with vacuuming or steaming. The correct answer must be related to a process that involves both heat and vacuum, which aligns with Puff drying, as it can utilize vacuum conditions during its operation for better moisture removal efficiency.

Step 4: Conclusion
Puff drying uses either by heat and subsequent vacuum (to increase the pressure difference between internal and external environment) or a combination of vacuuming and steaming. Final Answer: (A)