For classification of potable (drinking) water, we use a _______________ filter?
Correct answer: A. Gravity sand
- A. Gravity sand
- B. Plate and frame
- C. Vacuum leaf
- D. Rotary vacuum
Explanation
Gravity sand filters are widely used in potable-water treatment because water passes slowly through sand, which traps suspended impurities. The other filters are mainly used for industrial solid-liquid separation.
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