Question

________ is not use to make Portland Cement (PC).

(a) Calcareous Rocks

(b) Argillocalcareous Rocks

(c) Argillaceous Rocks

(d) Sand

I got this question during an interview for a job.

This key question is from Manufacture of Portland Cement topic in section Cement of Concrete Technology

Answer 1

Right choice is (d) Sand

The explanation is: Sand is mixed with Cement to make concrete instead of making cement. Materials which we get from these 3 rocks are useful to make healty PC.