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Question

The process of removing large objects such as plastic bags, paper, metals using grills and nets is called .

A
screening
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B
sedimentation
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C
purification
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D
filtration
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Solution

The correct option is A screening
Screening is the process of removing large objects from wastewater using nets and grills. It is the first operation in wastewater treatment. These objects get caught in the grills while water flows free. In English, the word “screening” means to filter selectively. In this case, large objects are filtered.

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