Discussion
Assertion (A): Drying can be accelerated considerably once the shrinkage stage is complete.
Reason (R): Further water removal empties pores without contracting the body, so no shrinkage stress arises.
Answer: C
Correct answer: Both A and R are true, and R is the correct explanation of A
Both are true and the reason gives the justification. Cracking in drying comes from differential shrinkage, so once shrinkage has ceased there is nothing to set up the stress and the remaining water can be driven off as fast as heat can be supplied. A good schedule is therefore slow and humid at first and hot and dry afterwards - and running it at one uniform rate wastes either time or product.
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