Building Materials
With increase in moisture content, the bulking of sand

First increases to a certain maximum value and then decreases
Decreases
Increases
First decreases to a certain minimum value and then increases

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Building Materials
Sapwood consists of

Thin fibre which extends from the pith outwards and holds the annular rings together
Portion of timber between heartwood and cambium layer
Thin layers below the bark
Innermost annular rings around the pith

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