During an inspection of a ships storeroom, you find sealed containers of chemicals labeled "potassium bicarbonate" and "potassium chloride". These chemicals are most commonly used aboard ship for _______.
• Chemical composition of dry chemical firefighting agents used in portable and fixed extinguishing systems • Common engineering uses of potassium salts (like scale removal, water treatment, cleaning) on ships • Typical contents of dry chemical fire extinguishers versus solvents and water-treatment chemicals
• Which of these uses would most likely involve a powdered solid stored in sealed containers in a storeroom, rather than a liquid or strong solvent kept in the engine room or workshop? • Think about what kinds of chemicals are normally used for scale removal in evaporators and degreasing machinery—do those usually involve potassium salts or strong acids/solvents? • Where on board would you usually expect to find engine jacket water treatment chemicals, and what forms (liquid vs powder) do they normally take?
• Confirm which of the listed shipboard tasks commonly uses powdered potassium salts as a primary ingredient • Consider the physical form (powder vs liquid vs solvent) appropriate to each option • Match the storage pattern: sealed containers of a fine chemical powder in a storeroom versus chemicals stored near evaporators, engines, or workshops
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