USCG Basic Damage Control Practice Exam 2025 – Comprehensive Study Resource

Question: 1 / 400

What is the primary chemical component of PKP?

Potassium hydroxide

Potassium bicarbonate

The primary chemical component of PKP, which stands for Portable Fire Extinguisher using Purple K powder, is indeed potassium bicarbonate. This compound is highly effective for fighting fires involving flammable liquids and electrical fires due to its capability to displace oxygen and interrupt the combustion process. When PKP is used, it effectively forms a barrier between the combustible material and the oxygen in the environment, helping to extinguish the fire quickly.

In addition to its chemical properties, potassium bicarbonate is often favored in fire suppression for its non-corrosive nature, making it safe to use on sensitive electrical equipment, an aspect particularly important in maritime environments where electronic systems are critical. This makes PKP a versatile and essential tool in damage control situations.

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Potassium sulfate

Potassium carbonate

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