Red Seal Carpenter Practice Exam 2025 – All-in-One Resource to Master Your Certification!

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What happens to wood's dimensions when it is above or below its equilibrium moisture content?

It retains its original dimensions

It expands or contracts

Wood's dimensions will expand or contract when it is above or below its equilibrium moisture content. Equilibrium moisture content refers to the amount of moisture content in wood at which it is neither gaining nor losing moisture to the surrounding environment.

When the moisture content of wood increases and goes above this equilibrium state, the wood fibers absorb moisture, causing them to swell and expand, leading to an increase in dimensions. Conversely, when wood loses moisture and falls below its equilibrium moisture content, the fibers dry out, which results in shrinkage and a reduction in dimensions.

Understanding this dynamic is crucial for carpentry and woodworking because the stability of wood in construction and manufacturing is directly affected by moisture levels, which can cause warping, cracking, or other structural issues if not properly managed.

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It becomes brittle

It softens significantly

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