4) What is the term used for covering or killings of all knots in wood surface by red lead?

5) Which metal consists of copper and tin?

6) Which is the market form of timber with parallel sides having thickness less than 50 mm and its width exceed 50 mm?

7) What is the process of removing moisture present in freshly felled timber?

8) What is the artificial seasoning while timber immersed in a solution of suitable salt?