11. Which of the following is a commonly used method of paper recycling?
a) Mechanical recycling
b) Chemical recycling
c) Deinking
d) All of the above
12. What is the term used to describe the process of adding a thin layer of material to the surface of paper?
a) Coating
b) Lamination
c) Impregnation
d) Embossing
13. Which of the following is a commonly used paper grade for writing and printing purposes?
a) Bond paper
b) Tissue paper
c) Newsprint
d) Corrugated paper
14. What is the term used to describe the process of converting paper into pulp for recycling?
a) Pulping
b) Digesting
c) Refining
d) Deinking
15. Which of the following is a commonly used method of pulp bleaching?
a) Elemental chlorine bleaching
b) Oxygen delignification
c) Peroxide bleaching
d) All of the above
