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USCG Exam PracticeFirefighting, damage control, and emergency response

A vessel's crew is fighting a fire in an ordinary combustible materials storage area. Water is available. Which extinguishing agent is appropriate, and what agent must NOT be used on an adjacent energized electrical panel?

  1. ✓ Water is appropriate for the combustibles; water must not be used on the energized electrical panelCorrect
  2. B. CO2 is appropriate for the combustibles; dry chemical must not be used on the energized electrical panel
  3. C. Dry chemical is appropriate for the combustibles; CO2 must not be used on the energized electrical panel
  4. D. Water is appropriate for the combustibles; CO2 must not be used on the energized electrical panel

Why A is correct

46 CFR §185.512(a)(3)(iii) states water is appropriate for fires in ordinary combustible materials and that water must not be used on electrical fires. Class C fires (energized electrical) require a non-conductive agent. USCG Boatswain Manual Ch. 6 §6.1 confirms Class C covers energized electrical equipment.

Cited:46 CFR §185.512USCG Boatswain Manual Ch. 6 §6.1

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A vessel's crew is fighting a fire in an ordinary combustible mater… — USCG Exam Practice · CaptainsGround