The silicious sandstone which has been subjected to metamorphic action, is called

The sand is mixed with lime mortar to

For one cubic metre of brick masonry, the number of bricks required are

Lime occurs in a free state in nature.

A good quality cement should have higher percentage of

The indentation marks left on bricks during the process of moulding, are known as

The attrition test on stones is performed

The commonly used cement in cement paints is

The specific gravity of stone should not, in any case be less than