Based on its dry weight, a freshly felled tree may contain water

The nominal size of the modular brick is

The main constituent of cement which is responsible for initial setting of cement is

Quick lime . . . . . . . .

The proportions of charcoal, saltpetre and sulphur in gun powder by weight, are respectively:

Advantage of a clamp compared to a kiln for burning bricks is that

Knots in timber are

Wrought iron contains carbon about

During pudding