While wood typically exhibits higher compressive strength along the grain, its tensile strength relative to steel is approximately_______________?
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Answer: C. One fifth
Explanation
The correct answer is one fifth because the tensile strength of wood is approximately 20 percent that of steel. Wood possesses an anisotropic structure with high strength along the grain but significantly lower tensile capacity across the grain. Structural steel offers superior uniform tensile strength in all directions compared to natural timber building materials. Wood is a natural composite material consisting of cellulose fibers bound together by a lignin matrix. Structural steel is a manufactured ferrous alloy designed for high tensile and compressive load-bearing applications. Comparing mechanical properties requires evaluating the directional grain dependency of timber against isotropic steel.
Option A is incorrect because wood's tensile strength is much lower than half the strength of structural steel. Option B is incorrect because one third overestimates the tensile capacity of timber relative to high-strength steel. Option D is incorrect because one twelfth underestimates the tensile strength of wood compared to standard structural steel.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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