Lesson Notes By Weeks and Term v3 - Senior Secondary 1
Care of tools
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Care of tools
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Subject: Automobile Parts Merchandising
Class: Senior Secondary 1
Term: 2nd Term
Week: 2
Theme: Tools, Test Equipment And Accessories
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This topic introduces students to the essential practices involved in maintaining tools used in automobile parts merchandising and general mechanical work. Proper tool care is paramount for ensuring safety in the workplace, extending the lifespan of valuable equipment, maintaining accuracy in work, and ultimately contributing to the profitability and reputation of an automobile parts business or workshop in Nigeria. Understanding and implementing these practices minimizes unnecessary expenditure on tool replacement, improves work efficiency, and fosters a professional attitude among future automotive technicians and merchandisers.
Tools, Test Equipment And Accessories should apply a small amount of degreaser (e.g., kerosene, engine cleaner, or commercial degreaser) onto a rag and thoroughly clean the tools.
Step 3: Drying: He must ensure the tools are completely dry. He can use a clean, dry rag or allow them to air dry in a well-ventilated area. Residual moisture will lead to rust.
Step 4: Rust Prevention (Optional but Recommended): Once dry, he can apply a very thin film of light machine oil or rust preventative spray (like WD-40) to the metal surfaces of the tools, especially if they are not chrome-plated.
Commentary: Emphasizing immediate cleaning prevents grime from hardening and initiating corrosion. Drying is critical, especially in humid Nigerian environments.
Question 2: Mama Sikira runs a thriving auto parts store and small workshop in Ibadan. She has recently acquired a new sensitive diagnostic scan tool for modern vehicles. How should she ensure this expensive tool is properly stored to maximize its lifespan and prevent damage?
Solution 2: Step 1: Protective Casing: Mama Sikira should always store the diagnostic scan tool in its original hard protective case, which is typically designed to absorb shocks and prevent dust ingress. If the original case is damaged, a suitable replacement padded case should be acquired.
Step 2: Dry and Stable Environment: The tool should be stored in a dry, cool, and secure cabinet or shelf, away from direct sunlight, extreme temperatures, and high humidity. Ibadan's humidity could lead to internal electronic damage if not protected.
Step 3: Separate Storage: It should be stored separately from heavy hand tools or power tools to prevent accidental impact damage.
Step 4: Cable Management: Ensure all connecting cables are neatly coiled and secured, not bent or kinked, to prevent internal wire damage.
Commentary: Sensitive electronic tools require much stricter storage conditions than basic hand tools. Protection from impact, dust, moisture, and temperature fluctuations is key.
Question 3: A student observes that the adjustable wrench in their workshop feels stiff and difficult to adjust. What immediate tool care action is required, and what is its purpose?
Solution 3: Action: The immediate tool care action required is lubrication. The student should apply a small amount of light machine oil (e.g., 3-in-1 oil or engine oil) to the screw mechanism and the moving jaw of the adjustable wrench. Then, work the jaw back and forth to distribute the lubricant.
Purpose: The purpose of lubrication is to reduce friction between the moving parts, allowing them to glide smoothly. This prevents wear and tear, makes the tool easier and more efficient to use, and helps to prevent rust formation in those moving areas.
Commentary: Stiff moving parts are a clear indicator of friction and potential rust. Lubrication is a simple yet effective solution to restore smooth operation and extend tool life.
5. Independent Practice (Questions Only)
1. List three dangers of using poorly maintained tools in an automobile workshop.
2. Describe the cleaning process for a hand drill after using it to drill through metal.
3. Explain why it is important to store precision measuring tools like micrometers in their specialized cases.
4. Identify one common issue that arises from neglecting to lubricate tools with moving parts.
5. What checks should a technician perform when inspecting a power grinder before starting work?
6. Give two reasons why a mechanic should avoid using a spanner as a hammer.
7. Suggest a suitable rust-preventative measure for metal hand tools stored in a humid environment like Port Harcourt.
8. How does the proper care of tools contribute to the overall profitability of an automobile parts merchandising business?
9. An apprentice mistakenly leaves a set of spanners exposed to rain. What immediate steps should be taken to prevent long-term damage?
1
0. Design a simple daily tool care checklist for a small workshop that has hand tools, a drill, and a car jack.
6. Evaluation and Assessment 6.1 Formative Assessment: Observation: The teacher observes student participation in discussions, group activities, and their ability to follow instructions during any practical demonstrations. * Question and Answer: The teacher asks probing questions throughout the lesson to gauge to remove dust and fingerprints.
Storage: He should place the clean hand tools back in their designated slots in his toolbox. The diagnostic scanner should be returned to its protective case and then stored in a secure, dry cabinet to protect it from dust, humidity, and accidental knocks.
Inspection: Before storing, he visually checks the spanners for any bends or cracks, and the screwdriver tips for wear. He ensures the scanner's cable is not frayed.
Lubrication: If his adjustable wrench feels stiff, he might apply a drop of light oil to its adjusting mechanism.
3. Teaching and Learning Activities 3.1 Teacher Activities: Introduction (10 minutes): Begin by reviewing the previous topic briefly (e.g., types of automotive tools and their functions).
Pose a question: "What happens if a mechanic constantly uses blunt tools or rusty spanners in their workshop?" Facilitate a brief class discussion to elicit responses related to poor quality work, injuries, and customer dissatisfaction.
Introduce the topic: "Today, we will be discussing the crucial aspect of 'Care of tools' – how to maintain our tools to avoid these problems." State the learning objectives clearly.
Concept Explanation (20 minutes): Define "Tool Care" and explain its importance using local examples (e.g., impacts on small businesses in Aba motor parts market). Systematically explain each principle of tool care: cleaning, storage, lubrication, inspection, maintenance/repair, and proper use. Use visual aids if available (e.g., pictures of well-maintained vs. poorly maintained tools, actual examples of tools). Emphasize the specific care requirements for different tool categories (hand, power, measuring tools). Demonstration (15 minutes - if resources permit): If tools (e.g., a spanner, a screwdriver, a piece of rag, light oil, toolbox) are available, demonstrate proper cleaning, oiling, and storage techniques. Show students how to inspect a tool for common defects (e.g., loose handle, blunt edge, frayed cord).
Group Activity Facilitation (15 minutes): Divide students into small groups. Provide each group with a scenario (e.g., "A mechanic finds his tools are getting rusty quickly. What advice would you give him?"). Monitor group discussions and provide guidance.
Consolidation and Wrap-up (5 minutes): Bring the class together and invite groups to share their findings. Summarize the key takeaways regarding tool care and its importance. Address any lingering questions. 3.2 Student Activities: Participation in Introduction: Actively participate in the initial discussion about the consequences of poor tool care.
Note-taking: Take comprehensive notes during the teacher's explanation of key concepts.
Observation: Pay close attention during tool care demonstrations, asking clarifying questions.
Group Discussion: Engage in group activities, discussing assigned scenarios and formulating solutions or advice related to tool care. For example, a group might discuss how to clean and store a set of spanners, a jack stand, and a multi-meter in a busy workshop in Abuja.
Reporting: A designated member from each group presents their group's findings or solutions to the class.
Question and Answer: Ask questions to deepen understanding and clarify doubts.
4. Guided Practice (With Solutions)
Question 1: Mr. Okafor, a new mechanic apprentice in Enugu, has just finished using a set of wrenches and screwdrivers that were heavily soiled with engine oil and grime. What steps should he take to clean these tools before storing them?
Solution 1: Step 1: Initial Wipe-down: Mr. Okafor should first use an old rag or piece of cloth to wipe off as much of the loose oil and grime as possible.
Step 2: Degreasing: For stubborn oil and grease, he should apply a small amount of degreaser (e.g., kerosene, engine cleaner, or commercial degreaser) onto a rag and thoroughly clean the tools.
Step 3: Drying: He must ensure the tools are completely dry. He can use a clean, dry rag or allow them to air dry in a well-ventilated area. Residual moisture will lead to rust.
Step 4: Rust Prevention (Optional but Recommended): Once dry, he can apply a very thin film of light machine oil or rust preventative spray (like WD-40) to the metal surfaces of the tools, especially damage, rust, loss, and theft, and to ensure easy access.
Method: Dry Environment: Store tools in a dry area to prevent rust. High humidity in places like coastal cities (e.g., Lagos) accelerates corrosion.
Organized Storage: Use toolboxes, tool chests, pegboards, wall racks, or drawers. Each tool should have a designated place.
Separation: Store delicate tools (e.g., measuring instruments) separately from heavy or sharp tools to prevent damage.
Protection: Apply a thin film of oil (e.g., WD-40, light machine oil) to metal surfaces of hand tools, especially those not used frequently, to prevent rust.
Power Tools: Store power tools in their original cases or in dedicated, secure cabinets to protect them from impact and dust. Disconnect from power source.
Measuring Tools: Store precision measuring tools (e.g., micrometers, vernier calipers) in their protective cases, often lined with felt, in a temperature-stable environment.
Sharp Tools: Store cutting tools with their edges protected (e.g., sheaths, covers) to prevent accidental cuts and damage to the blade. 2.3.3 Lubrication: Purpose: To reduce friction between moving parts, prevent rust, and ensure smooth operation.
Method: Moving Parts: Apply appropriate lubricants (e.g., light machine oil, grease) to hinges, pivots, screws, and other moving components of tools like pliers, wrenches, and hand drills.
Frequency: Lubricate as needed, especially after cleaning or if tools feel stiff.
Caution: Avoid over-lubrication, as it can attract dirt. Use lubricants sparingly and wipe off excess. Do not lubricate electrical contacts or parts not designed for it. 2.3.4 Inspection: Purpose: To identify wear, damage, or defects that could compromise safety or performance.
Method: Before and After Use: Visually inspect tools for cracks, bends, chips, loose handles, frayed cords (for power tools), and blunt edges.
Hand Tools: Check for deformed jaws on wrenches, chipped screwdriver tips, loose hammerheads, or cracked handles.
Power Tools: Inspect power cords for cuts or exposed wires, check switches for proper function, listen for unusual noises, and ensure safety guards are in place.
Measuring Tools: Verify that markings are clear and that components move freely without excessive play. Check for calibration accuracy periodically.
Action: Immediately tag damaged tools for repair or disposal. Never use a damaged tool. 2.3.5 Maintenance and Repair: Sharpening: Cutting tools like chisels, saws, and drill bits should be sharpened regularly to maintain their effectiveness and reduce effort.
Calibration: Precision measuring instruments should be calibrated periodically by qualified personnel to ensure accuracy.
Minor Repairs: Replace worn parts (e.g., screwdriver tips, carbon brushes in power tools), tighten loose screws, or re-handle tools where feasible and safe.
Professional Repair: For complex or high-value tools (e.g., diagnostic scanners), send them to authorized service centers for repair. 2.3.6 Proper Use: Right Tool for the Job: Always use the correct tool for the specific task. Using a screwdriver as a chisel or a spanner as a hammer can damage both the tool and the workpiece.
Manufacturer's Instructions: Follow manufacturer guidelines for operating and maintaining tools, especially power tools and complex equipment.
Avoid Overloading: Do not force tools beyond their design limits. This can lead to tool breakage and personal injury.
Example Scenario: Consider a typical mechanic workshop in Kano. A mechanic, Malam Garba, finishes a repair on a car's engine. He uses several spanners, screwdrivers, and a diagnostic scanner.
Cleaning: Malam Garba should wipe down the spanners and screwdrivers with a rag, possibly using a little kerosene to remove grease. He should gently clean the screen and housing of the diagnostic scanner with a soft, dry cloth to remove dust and fingerprints.
Storage: He should place the clean hand tools back in their designated slots in his toolbox. The diagnostic scanner should be returned to its protective case and then stored in a secure, dry cabinet to protect it from dust, humidity, and accidental knocks.
Inspection: Before storing, he visually checks the spanners for any bends or cracks, and the screwdriver tips for wear. He ensures the scanner's cable is not frayed. * Lubrication: If his adjustable wrench feels stiff, he might apply a drop of light