Subtopic: Paddy tempering process in commercial drying
Question Statement:
The primary operational purpose of the 'tempering' stage in multi-pass continuous paddy drying is to:
Options:
(A) Allow internal moisture to diffuse outward to the surface, relieving internal moisture and thermal stress gradients to minimize grain cracking
(B) Cool the grain down to sub-zero temperatures for frozen storage
(C) Sterilize fungal spores by boiling the husk
(D) Increase the moisture content of the paddy by re-wetting
Answer Key:
A
Step-by-Step Solution & Explanation
Tempering provides a rest period without airflow where moisture diffuses from the core to the dry surface. This equalizes moisture gradients, relaxes steep mechanical stresses, and prevents checking/fissuring, drastically improving Head Rice Yield.