Question

Stock (fibrous material) is prepared by which of the following processes?

(a) Extraction and expelling

(b) Beating and extraction

(c) Extraction and refining

(d) Beating and refining

The question was asked during an online interview.

The question is from Paper Making topic in section Paper and Paper Based Packaging Materials of Food Packaging Technology

Answer 1

Correct answer is (d) Beating and refining

For explanation: Stock—as fibrous material is commonly called—is prepared by two chief processes commonly referred to as beating and refining. Both operations are fundamentally the same; in many situations, the two terms are used synonymously. Beating and refining are used to improve the strength and other physical properties of the finished sheet, and to influence the behavior of the system during the sheet-forming and drying steps.