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Q: In case of reinforced concrete, what is the minimum grade of concrete that should be used in sea water or when exposed directly along the sea–coast?
  • A. M15
  • B. M20
  • C. M25
  • D. M30
Correct Answer: Option D - According to Is 456-2000. In case of reinforced concrete, minimum grade of concrete reinforced concrete, minimum grade of concrete that should be used in sea water or when exposed directly along the sea-coast is not less than M-30.
D. According to Is 456-2000. In case of reinforced concrete, minimum grade of concrete reinforced concrete, minimum grade of concrete that should be used in sea water or when exposed directly along the sea-coast is not less than M-30.

Explanations:

According to Is 456-2000. In case of reinforced concrete, minimum grade of concrete reinforced concrete, minimum grade of concrete that should be used in sea water or when exposed directly along the sea-coast is not less than M-30.