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Q: As per IS 456:2000, minimum grade of concrete to be used for RCC work under any exposure condition–
  • A. M 10
  • B. M 15
  • C. M 20
  • D. M 30
Correct Answer: Option C - As per IS 456 :2000 minimum grade of concrete to be used for RCC work under any exposure condition shall not be less then M 20.
C. As per IS 456 :2000 minimum grade of concrete to be used for RCC work under any exposure condition shall not be less then M 20.

Explanations:

As per IS 456 :2000 minimum grade of concrete to be used for RCC work under any exposure condition shall not be less then M 20.