Pick up the correct statement from the following:

The most commonly used synthetic abrasive is

The portion of a brick cut to form angles other than right angles in plan, is known as

If the iron ore contains clay as an impurity, the flux added during calcination, is

Duco paints are

Pick up the correct statement from the following:

Pig iron made from haematite ores free from sulphur, phosphorus and copper, is known as

Spalling hammer is used for

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