The burning of bricks in kilns is complete within

Distemper is used on

A first class brick should not absorb water more than

The density of concrete

A good building stone is one which does not absorb more than

The soundness of cement is tested by

The timber whose thickness is less than 5 cm and the width exceeds 12 cm, is called a

The best primer used for structural steel work is

The defect caused by imperfect seasoning, is called