FDEP Drinking Water Operator C Practice Exam 2026 – Your Complete Guide to Exam Success!

When icing occurs on a chlorine cylinder, it indicates that the cylinder is operating under conditions that are creating an excessive drop in temperature, usually due to the rapid draw-off of chlorine gas. Placing another cylinder online is the most effective action because it helps balance the draw-off rate between multiple cylinders. This allows for a more stable gas supply without overworking a single cylinder, which can alleviate the conditions causing the icing.

Utilizing another cylinder spreads the demand for chlorine gas across multiple sources, which can help maintain the pressure and temperature in any one cylinder. It also reduces the risk of potential hazards associated with using a chilled or iced-up cylinder, ultimately ensuring a safer and more efficient operation.

While increasing the draw-off rate may seem like a quick solution, it would likely exacerbate the icing problem. Decreasing the pressure could lead to inadequate chlorine delivery, and stopping chlorine use altogether is not a practical solution as it would disrupt the chlorination process essential for disinfection. Thus, placing another cylinder online helps manage the chlorine supply effectively without compromising system operation.