AWT Certified Water Technologist (CWT) Practice Test
Water treatment certification covering industrial water systems, boiler water, cooling water, chemical treatment programs, and microbiological control. Administered by Association of Water Technologies. Key domains include Boiler Water Treatment, Cooling Water and Closed System Treatment, External Treatment and General Water Treatment Knowledge. The exam consists of 200 questions over 240 minutes.
Sample Questions
Try a few questions to see what the full exam is like.
A packaged boiler shows wet steam complaints after a sudden process load swing. Boiler-water conductivity is near the upper limit, alkalinity is high, and the separator inspection history is unknown. What is the best first response? The service packet is dated 2025-05-25, lists asset tag CWT-017, and includes an unrelated note that the night operator changed shifts last week.
A 150-psi firetube boiler cycles feedwater eight times. Conductivity is stable, but the plant manager asks why the blowdown valve is open so often after a fuel-cost review. What is the best explanation? The service packet is dated 2025-02-16, lists asset tag CWT-014, and includes an unrelated note that the night operator changed shifts last week.
A cooling tower serving a data center is at 5.5 cycles. Basin pH is 8.8, calcium hardness is 820 mg/L as CaCO3, skin temperatures are high, and white scale appears on the condenser tube sheet. Which action best addresses the controlling risk? The service packet is dated 2025-08-07, lists asset tag CWT-020, and includes an unrelated note that the night operator changed shifts last week.
A conductivity controller on a 600-ton cooling tower shows stable readings near the set point, but grab samples from the tower basin are 35 percent higher. The probe is mounted in a bypass line that is valved almost closed, and the inhibitor pump is paced from the controller relay. Which correction is most defensible? The service packet is dated 2025-03-10, lists asset tag CWT-003, and includes an unrelated note that the night operator changed shifts last week.
A survey finds carbon steel piping, copper alloy condenser tubes, stainless pump trim, and a magnesium anode installed in the same closed condenser loop. Conductivity is low, nitrite is on target, but copper is increasing in samples after a pump replacement. What should the CWT evaluate first? The service packet is dated 2025-02-07, lists asset tag CWT-002, and includes an unrelated note that the night operator changed shifts last week.
Why This Certification Opens Doors
In the real world, the performance and longevity of multi-million-dollar industrial assets-from power plant boilers to hospital cooling towers-depend entirely on precise water treatment. A CWT-certified professional possesses the proven, holistic knowledge to prevent catastrophic failures like scaling, corrosion, and microbiological fouling, which can lead to unscheduled downtime, massive repair costs, and safety hazards. This certification translates directly into operational reliability, regulatory compliance, and significant cost savings for clients, establishing the holder as a trusted advisor capable of protecting critical infrastructure.