Practice Test Geeks(FST) Fire Safety Technician Certification Practice Test
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Fire Extinguishers Flashcards

7 cards from real FST practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Fire Extinguishers flashcards as text

  1. During an annual maintenance inspection, a technician finds that a dry chemical extinguisher has caked or hardened agent inside. What is the required action?

    Answer: Remove from service, empty, clean, and recharge with new agent

    Caked or hardened agent must be replaced; the extinguisher must be emptied, internally cleaned, and recharged with fresh agent to ensure proper discharge.

  2. What does the letter 'D' classification on a fire extinguisher indicate?

    Answer: The extinguisher is designed for combustible metal fires

    Class D extinguishers are specifically designed for combustible metal fires such as magnesium, titanium, zirconium, sodium, and potassium.

  3. A 6-year maintenance on a stored-pressure dry chemical extinguisher requires the technician to:

    Answer: Empty the extinguisher, inspect internally, and replace agent and expellant gas

    The 6-year maintenance requires complete emptying, internal examination, replacement of all dry chemical agent, and recharging with new expellant gas.

  4. Which type of extinguisher requires a hydrostatic test every 5 years?

    Answer: Stored-pressure water extinguishers

    Stored-pressure water, loaded stream, and AFFF (foam) extinguishers require hydrostatic testing every 5 years per NFPA 10.

  5. When using the PASS technique to operate a fire extinguisher, what does the second 'S' stand for?

    Answer: Sweep side to side at the base of the fire

    In the PASS acronym, the second S stands for Sweep — moving the nozzle from side to side at the base of the flames.

  6. What is the primary hazard of using a CO2 extinguisher in a small, confined space?

    Answer: Oxygen displacement can create an immediately dangerous atmosphere for occupants

    CO2 extinguishes fire by displacing oxygen; in a confined space, this can reduce oxygen to levels immediately dangerous to life and health (IDLH) for any occupants.

  7. A fire extinguisher service technician discovers an extinguisher that has a manufacture date of 12 years ago and has never been hydrostatically tested. What is the correct action?

    Answer: Perform an immediate hydrostatic test and return to service if it passes

    The extinguisher is overdue for its hydrostatic test; it must be removed from service immediately and hydrostatically tested before it can be returned to service.