Red Seal Cabinetmaker Practice Exam

How does humidity impact wood cabinetry?

1. High humidity can make wood more brittle

2. Low humidity increases the risk of mold

3. High humidity can cause wood to swell, while low humidity can lead to shrinkage and cracks

4. Humidity levels have no significant impact on wood

The correct answer is: High humidity can cause wood to swell, while low humidity can lead to shrinkage and cracks

Wood is a hygroscopic material, meaning it absorbs and releases moisture based on the surrounding humidity levels. When humidity levels are high, wood fibers absorb water, leading to swelling. This swelling can cause joints to misalign, doors to stick, and overall structural integrity to be compromised. On the other hand, low humidity causes the wood to lose moisture, resulting in shrinkage. This shrinkage can create gaps, cracks, and twists in the cabinetry as the wood contracts. Understanding this behavior is crucial for cabinetmakers, as it impacts not only the aesthetics but also the durability and lifespan of wooden cabinetry. Proper treatment and finishing techniques can help mitigate these effects, but awareness of the humidity's impact is essential when working with wood.