Which extinguisher has the heaviest listed weight among the CO2 and PKP options described?

• A. CO2 extinguisher
• B. Water extinguisher
• C. PKP extinguisher
• D. AFFF extinguisher

Answer: (C)

The key idea is that extinguisher weight comes from both the contents and the container. PKP uses dense dry chemical powder packed inside a substantial steel cylinder, which adds a lot of mass. A CO2 extinguisher, by contrast, relies on compressed gas; even though the gas adds weight, the overall package for a given size tends to be lighter than a PKP unit. Because of the heavier content and the sturdy shell, the PKP extinguisher will have a heavier listed weight on its label than a CO2 extinguisher of similar size.