1.The main ingredients of Portland cement are

2.Early attainment of strength in rapid hardening cement is mainly due to

3.The initial setting time for ordinary Portland cement as per IS specifications should not be less than

4.The constituent of cement which is responsible for all the undesirable properties of cement is

5.Study the following statements. i) Hydraulic lime is suitable for white washing, ii) Fat lime is suitable for whitewashing, iii) Hydraulic lime is suitable for making mortar, iv) Fat lime is suitable for making mortar. The correct answer is