Journeyman Plumber ExamTools, Equipment, and SafetyEasy
A plumber is using an acetylene torch to braze copper pipes. Which type of fire extinguisher should be readily available for immediate use?
- AClass D
- BClass B
- CClass A
- DClass ABC
Show answer & explanationAnswer & explanation
Correct answer: D. Class ABC
Brazing involves an open flame and high heat, creating potential for various types of fires. Class A fires involve ordinary combustibles (insulation, wood), Class B fires involve flammable liquids (fuels), and Class C fires involve energized electrical equipment. A Class ABC extinguisher is versatile and can handle all these common fire types, making it the most appropriate choice for general plumbing work with torches.
Why the other options are wrong
- A. Class D extinguishers are specifically for combustible metals and are not applicable to typical plumbing brazing operations.
- B. Class B extinguishers are for flammable liquids, such as fuels, oils, or solvents, which could be a secondary risk.
- C. Class A extinguishers are for ordinary combustibles like wood or paper, which might be present but don't cover other potential fire types.
Fire Extinguisher Classes
A categorization system for fire extinguishers based on the types of fires they are designed to put out.
- Class A: Ordinary combustibles (wood, paper)
- Class B: Flammable liquids/gases (oil, gasoline)
- Class C: Energized electrical equipment
- Class D: Combustible metals
- Class K: Cooking oils/fats (kitchen fires)
Memory trick: ABC: Anything, Boiling, Current.