29) Which floor with a concrete base is spread and levelled with 5 to 8 cm thick lime-surkhi mortar?

30) Which floor is used for surface subjected to heavy wear like dairies and hospital?

31) What is the ratio of cement mortar used to fix tiles on floor?

32) Which floor is constructed with cement concrete 1:1:3 and aggregates used are limestone, quartz silt and ballast?

33) Which vertical transportation is suitable for large number of people?