Question

For a stone to be used in road work, the coefficient of hardness as worked out from the hardness test should be:

• A. more than 17
• B. 15 to 17
• C. 9 to 15
• D. less than 9

Hint:

For road works, use stones with hardness coefficient>17 to avoid rapid abrasion.

Answer 1

The Correct Option is A

Stones used in road construction must be highly resistant to wear. A coefficient of hardness greater than 17 is recommended for such applications to withstand heavy traffic loads and environmental wear.