AALSO Water Quality Level 1 Practice Test

During UV system installation, what should be kept in the chamber if flow stops to avoid damaging components?

Power off the UV lamp immediately. Vent the chamber to atmosphere to prevent pressure buildup. Disconnect the piping and drain the chamber. Hold water in the chamber if the flow stops to reduce the risk of thermal shock and breakage of the quartz tube and bulb.

Correct Answer:

Hold water in the chamber if the flow stops to reduce the risk of thermal shock and breakage of the quartz tube and bulb.

Explanation:

When a UV lamp is running, the water flow cools and provides thermal mass for the lamp and its quartz sleeve. If the flow stops, heat can build up quickly, creating a rapid temperature change that can crack or break the quartz tube and bulb (thermal shock). Keeping water in the chamber maintains cooling and a stable temperature, reducing stress on those components and preventing damage. Venting would introduce air and remove cooling, draining removes the coolant altogether, and powering off doesn’t address the need for immediate cooling during a flow interruption.

Access more questions from this quiz

Continue to AALSO Water Quality Level 1 Practice Test for more practice questions and the full quiz experience.

Access More Questions