The commonly used lime for works under water or in damp situations is

For the construction of retaining walls, a

Lacquer paints are more durable than enamel paints.

The purpose of seasoning of timber is to

Moorum is a decomposed laterite and has deep brown or red colour.

The addition of pozzolana to Portland cement causes

The colour of brick depends upon the amount of iron oxide present in the clay.

The specific surface (in cm2/g) of a good Portland cement should not be less than

A first class brick should not absorb water more than