Lesson Plan for Senior Secondary 2 - Auto Mechanical - Carburetor And Air Cleaner Or Filter Ii

**Lesson Plan: Auto Mechanical - Carburetor and Air Cleaner/Filter II** **Grade Level:** Senior Secondary 2 **Subject:** Auto Mechanical **Topic:** Carburetor and Air Cleaner/Filter II **Duration:** 2 hours (120 minutes) ### Objectives: By the end of this lesson, students will be able to: 1. Explain the function and importance of a carburetor in an internal combustion engine. 2. Identify the components of a carburetor and explain their roles. 3. Explain the importance and functioning of air cleaners/filters in automotive engines. 4. Perform basic maintenance and troubleshooting on carburetors and air filters. ### Materials Needed: - Diagram of a carburetor and an air cleaner/filter - Actual carburetor and air cleaner/filter for demonstration - Screwdrivers, wrenches, and other basic tools - Cleaning materials (like carburetor cleaner) - Gloves and safety goggles - Handouts with key concepts and diagrams - Multimedia projector (for videos and presentations) - Sample reading materials on carburetors and air filters ### Lesson Plan: #### 1. Introduction (15 minutes) - **Greet the Students:** Welcome them to the class. - **Review Previous Lesson:** Briefly go over Carburetor and Air Cleaner/Filter I and any key points from the previous class. - **State Objectives:** Clearly explain what students will learn during the class. #### 2. Lecture and Discussion (35 minutes) - **Introduction to Carburetors:** Explain the basic function of a carburetor in an internal combustion engine (i.e., mixing air and fuel in the correct ratio for combustion). - Key components: float chamber, venturi, throttle valve, choke. - Types of carburetors: single-barrel, dual-barrel, and four-barrel. - **Functional Parts:** Discuss how each component works: - Float Chamber: Maintains a constant level of fuel. - Venturi: Creates a pressure drop that draws fuel into the air stream. - Throttle Valve: Controls the amount of fuel-air mixture entering the engine. - Choke: Enriches the fuel-air mixture for starting a cold engine. - **Introduction to Air Cleaners/Filters:** Explain their role in preventing dirt, debris, and other contaminants from entering the engine. - Types: Paper, foam, and cotton filters. - Importance: Prolongs engine life and maintains performance. #### 3. Demonstration (30 minutes) - **Carburetor Walkthrough:** Demonstrate how to take apart a carburetor, identify parts, and assemble it back. - **Air Cleaner/Filter Demonstration:** Show different types of air filters and demonstrate how to inspect and replace them. - **Safety First:** Emphasize the importance of safety measures such as wearing gloves and goggles. #### 4. Hands-On Activity (20 minutes) - **Student Practice:** Divide students into small groups and provide each group with a carburetor and an air filter. - Guide them through disassembling and reassembling the carburetor. - Have them inspect, clean (if necessary), and reinstall air filters. - **Instructor Support:** Circulate among groups to provide guidance and answer questions. #### 5. Video Presentation (10 minutes) - **Supplemental Learning:** Show an educational video on carburetor and air filter maintenance to reinforce concepts. - **Discussion:** Have a short discussion about what was learned from the video and how it applies to their practical work. #### 6. Review and Assessment (10 minutes) - **Recap Key Points:** Summarize the main points of the lesson. - **Q&A:** Allow students to ask questions and clarify any doubts. - **Quiz/Worksheet:** Distribute a short quiz or worksheet to assess students' understanding. #### 7. Closing (5 minutes) - **Homework Assignment:** Assign reading on advanced carburetor systems or maintenance procedures. - **Preview Next Lesson:** Briefly describe what the next lesson will cover to prepare students. - **Encourage Practice:** Encourage students to practice on their own or during free time in the lab. **Assessment Methods:** - Participation in hands-on activities - Performance in the quiz/worksheet - Engagement in discussions and demonstrations **Note:** Always ensure safety protocols are strictly followed during hands-on activities. Provide guidance and supervision as students perform mechanical tasks.