The cement becomes unsound by the presence of excess

Lacquer is

Refractory bricks resist

Good quality sand is never obtained from

The harmonious mixing of the clay ingredients, is known as

The yield strength and tensile strength of low carbon steel may be improved by the addition of

If the furnace is provided with insufficient fuel at low temperatures, the type of pig iron produced, is called

Acrylic sheets

Which of the following trees yields hard wood?