Before relying on a portable fire extinguisher, you should check that the pressure gauge needle is in the:

Before relying on a portable fire

Multiple choice — select the best answer

ARed overcharged zone
BRed discharged zone
CEmpty position
DGreen operable zone

✓ Correct answer: D. Green operable zone A charged, ready extinguisher shows its gauge needle in the green operable range. A needle in the red indicates it is over- or under-pressurized and may not work.

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Topic: Basic Fire Science

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Before relying on a portable fire extinguisher, you should check that the pressure gauge needle is in the:

Related questions — Basic Fire Science

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