Gelatinous solid (which plug the septum) can be filtered by a _____________ filter?
Correct answer: D. Pre-coat
- A. Sparkler
- B. Plate and frame
- C. Vacuum leaf
- D. Pre-coat
Explanation
A pre-coat of filter aid forms a porous filtering layer that prevents gelatinous solids from sealing the filter medium or plugging the septum. This is why pre-coat filters are preferred for such difficult slurries.
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