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Q: The 28-day mean compressive strength of ordinary Portland cement 33 grade (IS : 269 : 1989), 43 grade (IS : 8112 : 1989) and 53 grade (IS : 12269 : 1987) are, respectively ............., ............ and ................
  • A. 3.3 MPa; 4.3 MPa; 5.3 MPa
  • B. 33 MPa; 43 MPa; 53 MPa
  • C. 30 MPa; 40 MPa; 50 MPa
  • D. 28 MPa; 37 MPa; 46 MPa
Correct Answer: Option B - The 28 days mean compressive strength of ordinary Portland cement 33 grade (IS:269:1989), 43 grade (IS:8112:1989) and 53 grade (IS:12269:1987) are, 33 MPa; 43 MPa and 53 MPa. respectively.
B. The 28 days mean compressive strength of ordinary Portland cement 33 grade (IS:269:1989), 43 grade (IS:8112:1989) and 53 grade (IS:12269:1987) are, 33 MPa; 43 MPa and 53 MPa. respectively.

Explanations:

The 28 days mean compressive strength of ordinary Portland cement 33 grade (IS:269:1989), 43 grade (IS:8112:1989) and 53 grade (IS:12269:1987) are, 33 MPa; 43 MPa and 53 MPa. respectively.