Percentage content of silica in window glass, is

Pick up the correct statement from the following:

The preparation of surface of stone to obtain plain edges or to obtain stones of required size and shape is known as

A heavy stone is suitable for

Plywood is made from

The method of addition polymerization is used for obtaining:

Lime concrete is generally used for

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

Index number expressing the relative sizes of both coarse and fine aggregates, is called