The wood generally used for railway sleepers is

The percentage of the slag component of Portland-slag cement varies from

The process of mixing clay, water and other ingredients to make bricks, is known as

Which of the following statement is wrong?

Quick lime on reaction with water gives

The quarrying of stone by the method of wedging is successfully carried out in

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

The central part of a tree is called

The thickness of five-ply sheet varies from