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Lesson Plan Industry Sector
Transportation

Lesson Plan Originally Created By: Ramon Iniguez

How to use a dry chemical fire extinguisher (updated) by Ramon C. Iniguez

Part of Unit: General Shop Safety Practices

Lesson Plan Overview / Details

This lesson is designed to provide the students with the knowledge and experience to locate the fire extinguisher in your shop; visually inspect the fire extinguisher; and to know the steps needed to operate a fire extinguisher in the event of a fire emergency.

Student Objectives / Goals

  • Students will have an understanding of how to use a dry chemical fire extinguisher
  • Students will have an understanding of the four classes of fires
  • Students will be able to locate the fire extinguishers in the shop
  • Students will have an understanding of the fire triangle

Times

One class session
100 Minutes

Activities in this Lesson

  • After the students are seated and ready, I tell them a story of a man frying chicken on a frying pan. The man is in a hurry to make his meal so he turns up the flame on the stove. In his haste, the grease catches fire.

    I ask the students, “What could the man use to extinguish the fire if a fire extinguisher is not available?” After a short class discussion in which I tell the students that a pan lid could be used to smother the fire, I introduce the fire triangle and begin the lesson.

  • The lecture:

    1. Explain the fire triangle and that a fire needs all three parts to start.
    2. Go over the four classes of fire.

    a. Give some examples of materials of each class of fire, then ask the student to give examples of their own for each class.

    b. Give scenarios of fires and have the students identify what class of fire it is.

    Example:

    i. A bag of clothing catches on fire:  Students should respond with Class-A fire

    ii. A pan of used oil,: Students should respond with Class-B fire.

    iii. Etc.

    3. Discuss the importance of storing flammable materials in their proper storage locker and of storing used shop rags in the proper container to minimize the risk of fires. Also discuss the importance of good housekeeping and disposal of trash on a regular basis to reduce the risk of fire.

    4. Talk about the importance of the monthly inspection of the fire extinguisher. Explain that a fire extinguisher hanging on the wall is not very effective if it loses its pressure or if its damaged or obstructed.

    5. Use the acronym PASS to help the students remember the steps to use the fire extinguisher.

    Pull the pin

    Aim at the base of the fire

    Squeeze the handle to discharge the dry chemical

    Sweep side to side until the fire is extinguished or you gain a clear path to escape.

    Note: Remind students to take a position up-wind of the fire if possible, and not to get too close to the fire.

    6. Use personal experience you may have had with fires or fire extinguishers.

    Resources and Materials

    • Fire extinguisher [ Download ] Inspecting and using a dry chemical fire extinguisher
  • Assessment:

    Place the students in small groups and have them do the following:

    1. Locate all the fire extinguishers in the shop and have them note their location on a sheet of paper or lab sheet that you design.

    2. Inspect the fire extinguishers in the shop for serviceability and note any deficiencies on their sheet of paper or lab sheet that you design.

    Note: Place a defective fire extinguisher in place of one of your serviceable ones to see if they can identify the deficiency.

    3. Locate flammable materials around the shop and have students note on their sheet of paper or lab sheet where they should be stored.

    4. As the groups finish activites 1-3, have each group simulate, or explain to you, the steps for using the fire extinguisher. Ask the group questions about the classes of fire, the fire triangle, the storage of flammble materials and the inspection, providing feedback as needed.

  • When all groups are done with the shop activity, debrief the class on the following:

    1. Review the fire triangle, the inspection, and the acronym PASS.
    2. Review the location of the fire extinguisher and remind them of the importance to know where the fire extinguishers are located and how to use them. 
    3. Review the classes of fires.
    4. Emphasize the importance of knowing how to use the fire extinguisher in the event of a fire emergency.
    5. Emphasize the importance of good housekeeping and storing flammable materials in the proper storage cabinets to minimize the risk of fire.
    6. Ask for student feedback on the activity.