Fire triangle
- 1. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Unit 5 Reducing Hazards in Agricultural Mechanics
- 2. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. The Fire Triangle • Three components – fuel – heat – oxygen All three components must be present at the same time for fire to occur
- 3. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Preventing Fires • To prevent, control, or stop fires – Store fuels in approved containers – Store fuels away from other flammable materials – Store materials below their combustion temperature – Use fire only in safe surroundings – Put out fires by removing one or more elements in the fire triangle
- 4. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Fire Classes • Class A: Ordinary combustibles • Class B: Flammable liquids • Class C: Electrical equipment • Class D: Combustible metals
- 5. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Types of Extinguishers • Water: class A fires • Carbon dioxide: class B fires • Dry chemical: class A, B, and C fires • Blanket: used to smother fires on animals or humans
- 6. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Extinguisher Labels • Symbols – Green triangle: class A – Red square: class B – Blue circle: class C – Yellow star: class D
- 7. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Location of Extinguishers • A clean, dry location near an exit and within easy reach • Hung so that top is 3.5 to 5 feet above the floor • Hung so that bottom is at least 4 inches above the floor
- 8. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. How to Use an Extinguisher • For most extinguishers – Hold upright – Remove pin – Stand 6 to 10 feet away from fire – Direct nozzle toward base of fire – Press lever
- 9. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Extinguisher Safety Precautions • Inspect extinguishers monthly • Watch for hazard signs • Think before acting • Call for help immediately
- 10. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Signs of Danger • Slow-moving vehicle emblem (SMV): – Reflective orange triangle with red strip on all three sides – Identifies vehicle under 25 MPH
- 11. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Signs of Danger (continued) • Package labels – List important product information, hazards, precautions, and instructions – Keep materials in original containers with original labels attached – Always read label prior to use, disposal, or storage
- 12. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Emergency Procedure for Fires • Notify teacher • Remain calm • Activate fire alarm • Call fire department • Evacuate the area • Use fire extinguisher(s) if possible
- 13. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Emergency Procedure for Accidents • Send for help • Call 911—ambulance or police • Do not move victim unless they are in immediate danger • Try to awaken victim if unconscious • Treat for shock • Stop bleeding if present • Perform CPR if no sign of breathing and/or circulation
- 14. Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Important Terms • Combustion: to burn • Fuel: combustible material • Heat: energy that causes the temperature to rise • Oxygen: a gas in the atmosphere • Extinguished: put out • CPR: cardiopulmonary resuscitation