Question detail
What is grit removal in sewage treatment?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Using the Earth's resources and obtaining potable water
Question
- A. The process of separating organic matter from sewage
- B. The process of removing sand and small stones from sewage
- C. The process of adding chemicals to sewage
- D. The process of filtering sewage through membranes
Answer
The correct option is The process of removing sand and small stones from sewage. This answer is correct because it matches the approved learning objective to describe screening and grit removal as early stages of sewage treatment in the subtopic Waste water treatment.
Explanation
The correct option is The process of removing sand and small stones from sewage. The process of removing sand and small stones from sewage is correct because it directly supports the approved learning objective to describe screening and grit removal as early stages of sewage treatment. This belongs to the subtopic Waste water treatment within Using the Earth's resources and obtaining potable water, so the explanation must stay tied to that curriculum context. The other options are incorrect because they either do not answer this learning objective, use a vague statement, or move away from Waste water treatment.
Common mistake
Misunderstanding Screening and Grit Removal
Students often confuse screening and grit removal with the later stages of sewage treatment, thinking they are part of the biological treatment process.
Remember that screening and grit removal are initial steps that focus on removing large solids and grit before biological treatment occurs.
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