The hardest rock is

The compound of Portland cement which contributes to the strength after two to three years is

The trunk of tree left after cutting all the branches is known as

The most commonly used base for timber painting, is

Pick up the correct statement from the following:

In the method of condensation polymerization,

The frog of the brick in a brick masonry is generally kept on

The type of roof which slopes in two directions with a break in the slope on each side is known as

Pick up the correct characteristic of Pyroxene from the following: