Sewer pipes are made of

The percentage of alumina in a good brick earth lies between

Which of the following metamorphic rocks has the most weather resisting characteristics?

Turpentine oil is used in paints as

Whitworth compressed steel is obtained when molten steel is subjected to a pressure of

Oil varnish generally consists of

Pick up the correct statement from the following:

The base material for distemper, is

When a brick is immersed in water for 24 hours and then dried, if