1.

What is the required minimum fineness for grade 53 OPC?(a) 370 m^2/kg(b) 370 cm^2/g(c) 580 m^2/kg(d) 580 cm^2/g

Answer» Right option is (a) 370 m^2/kg

The explanation is: The value is in accordance with the IS code 12269 for 53 grade OPC.  Table 3 gives physical requirements and fineness is one of them.


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