Importance of Water Multiple Choice Questions and Answers 20 PDF Download
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MCQs on Importance of Water Worksheets 20 Quiz PDF Download
MCQ: Hot water also stimulates growth of
MCQ: Number of 'oceans' on earth is
MCQ: Feces and urine is also part of
- treated waste
- untreated waste
- all of them
MCQ: On earth percentage of fresh water is
MCQ: Solid matter settled at bottom is scraped away by electricity in
- metal screen
- grit tank
- sludge tank
- filter bed