Coastal and Floodplain Construction Inspector's Practice Exam

Which type of wood is classified as naturally durable?

1. Wood that needs chemical treatment

2. Wood that resists decay and damage

3. Wood that is mainly used for construction scaffolding

4. Wood that is only suitable for indoor use

The correct answer is: Wood that resists decay and damage

The classification of wood as naturally durable refers to its inherent ability to resist decay, damage from insects, and other environmental factors without the need for chemical treatments. This natural durability is a crucial characteristic for wood types used in construction, particularly in coastal and floodplain areas where exposure to moisture and pests can significantly degrade materials. Wood that resists decay and damage is typically derived from species that produce substances such as tannins and oils, which offer protection against fungi and insects. This natural resistance is a desirable quality, as it extends the lifespan of the wood and reduces the need for maintenance, making it a wise choice for various construction applications. In contrast, wood that requires chemical treatment is not naturally durable and relies on external preservation measures to enhance its longevity. Additionally, wood primarily used for scaffolding is chosen for its strength and weight-bearing capabilities rather than its durability in decay resistance. Lastly, wood that is only suitable for indoor use does not possess the necessary properties to withstand the elements, further emphasizing the importance of finding materials that are naturally durable for outdoor applications.