🔍 Key Concepts

• Boiler safety and pressure control when opening any tank or drum connected to the boiler system • The purpose of a boiler compound tank and how chemicals are normally introduced • Risks of thermal shock, scalding, or chemical reaction when adding treatment chemicals

💭 Think About

• Before opening any boiler-related tank, what condition must you always confirm about pressure and isolation? • Would changing boiler water level or feedwater temperature be a standard safety step for adding chemicals, or are those related to a different aspect of boiler operation? • Think about which option directly prevents injury or equipment damage at the moment you open the tank.

✅ Before You Answer

• Verify which choice deals directly with removing pressure from the tank before opening it. • Ask yourself whether operators are normally required to cool feedwater solely for chemical addition, or if that would interfere with normal boiler operation. • Consider whether raising boiler water level is a documented safety precaution for chemical dosing, or simply a normal operating adjustment.