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Q: According to the classification of ordinary portland cement by Indian Standard Bureau. Which of the following is not a grade of cement?
  • A. Grade 53
  • B. Grade 33
  • C. Grade 63
  • D. Grade 43
Correct Answer: Option C - The ordinary Portland Cement has been classified as– ∎ 33 Grade (I.S. 269) ∎ 43 Grade (I.S. 8112) ∎ 53 Grade (I.S.12269) Portland Cement is the most important constituent of concrete, in that it forms the binding medium for the discrete ingredients.
C. The ordinary Portland Cement has been classified as– ∎ 33 Grade (I.S. 269) ∎ 43 Grade (I.S. 8112) ∎ 53 Grade (I.S.12269) Portland Cement is the most important constituent of concrete, in that it forms the binding medium for the discrete ingredients.

Explanations:

The ordinary Portland Cement has been classified as– ∎ 33 Grade (I.S. 269) ∎ 43 Grade (I.S. 8112) ∎ 53 Grade (I.S.12269) Portland Cement is the most important constituent of concrete, in that it forms the binding medium for the discrete ingredients.