FE Recharging & Hydrostatic Testing Flashcards

Under NFPA 10, how often must stored-pressure dry chemical extinguishers with stainless steel shells undergo hydrostatic testing?

Answer: Every 12 years

Stored-pressure dry chemical extinguishers with stainless steel shells must be hydrostatically tested every 12 years per NFPA 10.

What is the required hydrostatic test interval for CO2 fire extinguishers?

Answer: 5 years

CO2 extinguishers must be hydrostatically tested every 5 years because they operate at very high pressure.

After a fire extinguisher has been used partially, what is the correct action per NFPA 10?

Answer: Recharge immediately regardless of how much agent was used

NFPA 10 requires that any extinguisher that has been used, even partially, be recharged or replaced immediately.

What test is required before recharging a fire extinguisher that has been discharged but is past its hydrostatic test date?

Answer: Hydrostatic test before recharging

An extinguisher that is past its hydrostatic test date must be tested hydrostatically before being recharged and returned to service.

Which type of portable fire extinguisher requires internal examination at every 6-year interval?

Answer: Stored-pressure dry chemical extinguishers

NFPA 10 requires a 6-year internal inspection of stored-pressure dry chemical extinguishers, coinciding with the 6-year maintenance service.

When recharging a dry chemical extinguisher, what must always be done before applying nitrogen pressure?

Answer: Verify the valve stem O-ring is seated and the fill cap is secure

Before pressurizing, the technician must confirm all seals and caps are properly seated to prevent dangerous gas leakage or ejection.