Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Unit 5 Reducing Hazards in Agricultural Mechanics

Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED.

Unit 5

Reducing Hazards in Agricultural Mechanics


The Fire Triangle

• Three components– fuel– heat– oxygen

All three components must be present

at the same time for fire to occur


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


Fire Classes

• Class A: Ordinary combustibles

• Class B: Flammable liquids

• Class C: Electrical equipment

• Class D: Combustible metals


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


Extinguisher Labels

• Symbols– Green triangle: class A

– Red square: class B

– Blue circle: class C

– Yellow star: class D


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


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


Extinguisher Safety Precautions

• Inspect extinguishers monthly

• Watch for hazard signs

• Think before acting

• Call for help immediately


Signs of Danger

• Slow-moving vehicle emblem (SMV):– Reflective orange triangle with red strip on all three sides

– Identifies vehicle under 25 MPH


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


Emergency Procedure for Fires

• Notify teacher

• Remain calm

• Activate fire alarm

• Call fire department

• Evacuate the area

• Use fire extinguisher(s) if possible


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


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

Documents

Copyright © 2010 Delmar, Cengage Learning. ALL RIGHTS RESERVED. Unit 5 Reducing Hazards in Agricultural Mechanics