Correct option is B
In the Vicat apparatus, the needle used to determine the initial setting time of cement has a diameter of 1 mm. This needle is used to penetrate the cement paste to check its initial setting characteristics.
In the Vicat apparatus, the needle used to determine the initial setting time of cement has a diameter of 1 mm. This needle is used to penetrate the cement paste to check its initial setting characteristics.
The minimum density (g/cc) of corrugated and semi-corrugated asbestos cement sheets considered acceptable for construction purposes by the Indian standard is: