USCG Exam PracticeFirefighting, damage control, and emergency response
When fighting a fire in ordinary combustible materials aboard a vessel, which extinguishing agent is appropriate, and which agent must NOT be used on energized electrical fires?
- ✓ Water is appropriate for Class A fires; water must not be used on Class C (energized electrical) firesCorrect
- B. CO2 is appropriate for Class A fires; dry chemical must not be used on Class C fires
- C. Dry chemical is appropriate for Class A fires; water must not be used on Class B fires
- D. Water is appropriate for Class B fires; CO2 must not be used on Class A fires
Why A is correct
The recommended emergency instructions state that water is appropriate for fires in ordinary combustible materials (Class A) and explicitly prohibit the use of water on electrical fires (Class C). Using water on energized electrical equipment creates electrocution hazard.