To retard the initial setting time of cement, the compound responsible, is

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

The usual percentages of clay and metal in cermet are:

Cast iron is used for

Slate is formed by metamorphic action on

Cast iron contains carbon approximately

Cast steel is manufactured by

Pick up the correct statement from the following:

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