In steel joist and stone floors, the clear span of the joists is equal to the _______ of the room.

R.C.C stands for _______

In __________ floors, the hollow blocks of clay or concrete are used to reduce the total weight of the floor.

Asphalt mastic has sand and asphalt in the ratio ____

_________________ flooring material is a mixture of raw rubber, fillers such as fibre, cork, etc. and pigments.

In asphalt mastic flooring _______ should be added to the asphalt mix in order to apply it cold.

_________ mortar is used to fill the joints in precast concrete floors.

Which of the following is not a type of R.C.C. floor?