HVAC Psychrometric Chart Practice Questions Fire Extinguisher Selection Guide

Fire Extinguisher Selection - Quick Reference

Fire Classes & Extinguisher Types:

Fire Classes and Corresponding Extinguishers

Fire Class Fuel Type Extinguisher Type Example Locations
Class A Ordinary combustibles (wood, paper, cloth) Water, Foam, ABC Dry Chemical Offices, Schools, Libraries
Class B Flammable liquids (gasoline, oil, grease) CO₂, Foam, Dry Chemical Garages, Kitchens, Labs
Class C Electrical equipment CO₂, Dry Chemical (non-conductive) Server Rooms, Electrical Panels
Class D Combustible metals (magnesium, sodium) Dry Powder (Metal-X) Industrial Facilities
Class K Cooking oils/fats Wet Chemical Commercial Kitchens

Key Recommendations

  1. Placement: Mount extinguishers in visible, accessible locations (max 1.5m height).
  2. Spacing: Max 15m travel distance for Class A, 9m for Class B in high-risk areas.
  3. Maintenance: Inspect monthly (pressure checks) and service annually.
  4. Training: Train staff on PASS technique (Pull, Aim, Squeeze, Sweep).

Note: Never use water on Class B, C, D, or K fires!