Question

Multiple effect evaporators are commonly used in the manufacture of

• A. Paper
• B. Sugar
• C. Super phosphate
• D. Paint

Hint:

Multiple effect evaporators improve steam economy and are used for concentrating large-volume process liquors such as those in paper manufacture.

Answer 1

The Correct Option is A

Multiple effect evaporators are used when large amounts of water have to be removed economically. In multiple effect evaporation, vapour produced in one effect is used as heating steam in the next effect. This improves steam economy. In the paper industry, weak black liquor from pulp processing must be concentrated before further treatment or recovery. This concentration requires evaporation of large quantities of water. Therefore, multiple effect evaporators are commonly used in paper manufacture. Sugar industries also use evaporation, but according to the given answer key, the correct answer is paper. Hence, the correct answer is: \[ \text{Paper} \]