SSC JE Civil Engineering 23-Sep-2019 Shift 1 Solved Paper

Question : 147 of 200

Marks: +1, -0

What is the grade of timber as per timber grading (IS 6543), if the modulus of elasticity in bending is between 5.6 to 9.8 kN/mm

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Grade B
Grade D
Grade A
Grade C

Validate

Solution:

As per timber grading (IS 6543):
The modulus of elasticity E is determined by conducting the bending test on a standard specimen. Timber on this basis, is classified as:
Group A : If E ≥ 12.5 kN/nm

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Group B : If E = 9.8 to 12.5 kN/mm

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Group C : If E = 5.6 to 9.8 kN/mm

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