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

Asbestos . . . . . . . .

Shingle is

Pick up the compound responsible for early strength of cement from the following:

The minimum compressive strength of 1<sup>st</sup> class bricks should be

Pick up the correct statement from the following:

Kaolin is chemically classified as

During pudding

Which of the following should be used for hearting of thicker walls?