Question

Separation of solid wastes of different densities is done by

• A. Air classifiers
• B. Screens
• C. Shredders
• D. Magnetic devices

Hint:

Common waste separation methods: \[ \boxed{ \begin{aligned} \text{Screens} &\rightarrow \text{Size separation}\\ \text{Magnetic separators} &\rightarrow \text{Ferrous metals}\\ \text{Air classifiers} &\rightarrow \text{Density separation} \end{aligned} } \]

Answer 1

The Correct Option is A

Step 1: Recall the function of an air classifier. Air classifiers separate materials based on differences in density and aerodynamic properties by using an air stream.

Step 2: Identify the correct equipment. Therefore, \[ \boxed{\text{Air Classifiers}} \] are used for separating solid wastes of different densities. Hence, \[ \boxed{(A)} \] is the correct answer.