Question:
Which of the following test evaluate the mechanical forces required to split the timber into parts? ______________
Which of the following test evaluate the mechanical forces required to split the timber into parts? ______________
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Splitting happens because fibers are pulled "away" from each other. That's why "Perpendicular" tension is the key.
Updated On: Aug 20, 2026
- Brittleness test
- Torsional Test
- Identation test
- Tension perpendicular to grain
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Question:
Timber is "anisotropic"—its strength is different in different directions. The question asks for the test that measures its resistance to splitting.
Step 2: Detailed Explanation:
• Splitting Mechanism: Timber splits most easily along the grain (parallel to the wood fibers). "Tension perpendicular to the grain" (D) is the force that pulls the fibers apart, causing a split.
• Practical Importance: This test is critical for wood used in joinery, furniture, and where nails or bolts are used. If a wood has low resistance to tension perpendicular to the grain, it will split easily when a nail is driven in.
• Other Tests:
- Torsional (B): Measures twisting strength.
- Indentation (C): Measures hardness.
- Brittleness (A): Measures resistance to sudden impact.
Step 3: Final Answer:
Tension perpendicular to grain is the test for splitting resistance.
Timber is "anisotropic"—its strength is different in different directions. The question asks for the test that measures its resistance to splitting.
Step 2: Detailed Explanation:
• Splitting Mechanism: Timber splits most easily along the grain (parallel to the wood fibers). "Tension perpendicular to the grain" (D) is the force that pulls the fibers apart, causing a split.
• Practical Importance: This test is critical for wood used in joinery, furniture, and where nails or bolts are used. If a wood has low resistance to tension perpendicular to the grain, it will split easily when a nail is driven in.
• Other Tests:
- Torsional (B): Measures twisting strength.
- Indentation (C): Measures hardness.
- Brittleness (A): Measures resistance to sudden impact.
Step 3: Final Answer:
Tension perpendicular to grain is the test for splitting resistance.
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