VIP Exclusive
CWS VIP Certification Practice Exam
CWS — The Water Quality Association (WQA) Certified Water Specialist (CWS) is a professional credential for water treatment specialists; the Level I exam consists of 100 multiple-choice questions with a 2-hour time limit and a 70% passing score, covering water chemistry, treatment technologies, and product applications.
30
Questions
120m
Time Limit
70.00%
To Pass
Question 1 of 30👑 VIP
A homeowner reports white, chalky deposits forming on faucet aerators, showerheads, and the heating elements of their water heater. A water analysis shows calcium at 120 mg/L and magnesium at 45 mg/L. Which of the following BEST describes the primary cause of these deposits?
Questions 2–30 and full explanations are VIP-exclusive.