Pick up the correct statement from the following:

Second class bricks

Pick up the correct statement from the following:

Excess of alumina in brick earth makes the brick

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

Manganese steels

Which of the following bricks are used for lining of furnaces?

The most important tool in brick laying for lifting and spreading mortar and for forming joints is

Three basic raw materials which are needed in large quantities for production of steel are