A topic you 'somewhat know' is a topic you don't know yet. Be honest about your weak areas.

Air and Water Quality — quick quiz

5 WB TET-pattern questions on Air and Water Quality. Instant scoring and solutions, no signup — see where you stand in a few minutes.

Question 1 of 5

Medium

A water sample was tested in a laboratory and found to contain harmful bacteria and dissolved salts. Which method would be most effective to make this water safe for drinking?