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