Discussion
The wood of Sal (Shorea robusta) is categorized into which class of refractory wood ?
Answer: B
Sal wood is classed as highly refractory.
In seasoning, 'refractory' woods are those that tend to crack, split and warp when dried. Sal (Shorea robusta) is dense and dries slowly with a strong tendency to surface cracking and end splitting, so it is placed in the highly refractory class and must be seasoned slowly, under cover.
Light woods such as semal, which dry quickly without serious defects, are non-refractory, and the moderately refractory class lies between the two.
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