What is the discharge time range for the EFRS CO2 extinguisher?

• A. 5-15s
• B. 30-60s
• C. 15-25s
• D. 10-30s

Answer: (D)

Discharge time is the duration a CO2 extinguisher can continuously release its agent once activated. For EFRS portable CO2 extinguishers, this time is typically within a 10 to 30 second range. The shorter end represents smaller cylinders, which empty quickly, while larger units can sustain the discharge closer to the 30-second mark. This quick, limited discharge is a hallmark of CO2 extinguishers, making them effective for rapid knockdown of small, contained fires (often electrical or electronics-related) but not for extended spraying. The other options either understate or overstate what a typical portable CO2 cylinder can deliver, whereas 10–30 seconds best matches the standard EFRS expectation.