During water treatment, how is small debris removed from unclean water?
A) by adding chlorine
B) by adding fluorine
C) by adding a flocculent
D) by passing the water through a screen
E) All of the above.
Correct Answer:
Verified
Q10: Which of the following countries has the
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Q12: A superfund site is
A)a large place to
Q13: All drinking water in the United States,
Q14: _ is a source of freshwater for
Q16: Of the 3% of fresh water available
Q17: During water purification, _ is added to
Q18: The change of phase from water vapor
Q19: Estimate which of the following contributes the
Q20: About how much of the water present
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