TERM – 2ND TERM
WEEK EIGHT
Class: Senior Secondary School 1
Age: 15 years
Duration: 40 minutes of 5 periods each
Date:
Subject: AUTO MECHANICAL
Topic: LUBRICATION SYSTEM II
SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to
I.) Define lubricating system
II.) Identify reasons for lubricating system
III.) Identify the uses of lubrication
IV.) State the types of lubricants
INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source
INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures,
INSTRUCTIONAL PROCEDURES
PERIOD 1-2
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PRESENTATION
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TEACHER’S ACTIVITY
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STUDENT’S
ACTIVITY
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STEP 1
INTRODUCTION
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The teacher explains the meaning of lubricating system and state the reasons for lubricating system
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Students listens attentively to the teacher
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STEP 2
EXPLANATION
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Teacher explains the uses of lubrication to motor vehicle and stat the types of lubricants.
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Students exhibit attentiveness and active engagement
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STEP 3
NOTE TAKING
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The teacher writes a summarized
note on the board
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The students
copy the note in
their books
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NOTE
LUBRICATION SYSTEM II
A lubricating system is a mechanism or system designed to reduce friction and wear between moving parts by applying a lubricant, such as oil or grease, to the surfaces in contact. The primary function of a lubricating system is to create a thin film of lubricant between moving surfaces to minimize direct metal-to-metal contact and thereby reduce friction, heat, and wear.
Reasons for lubricating system
- Friction Reduction: Lubrication reduces friction between moving parts, which helps to minimize energy loss and wear.
- Wear Prevention: By forming a protective layer between surfaces, lubrication helps prevent wear and prolongs the lifespan of machine components.
- Heat Dissipation: Lubricants can help dissipate heat generated by friction, preventing overheating and potential damage to the machinery.
- Corrosion Prevention: Lubricants can provide a protective barrier against moisture and contaminants, helping to prevent corrosion and rusting of metal surfaces.
Uses of lubrication
- Automotive: Lubrication is essential for the proper functioning of engines, transmissions, and other mechanical components in vehicles.
- Industrial Machinery: Lubrication is crucial for various industrial machinery and equipment, including pumps, bearings, gears, and hydraulic systems.
- Aerospace: Lubrication is necessary for aircraft engines, landing gear systems, and other critical components to ensure safe and reliable operation.
- Household Appliances: Lubrication is used in various household appliances such as washing machines, refrigerators, and power tools to reduce friction and improve performance.
Types of lubricants
- Liquid Lubricants: Examples include engine oils, hydraulic fluids, and transmission fluids. They are commonly used in automotive and industrial applications.
- Greases: Greases are semi-solid lubricants consisting of a base oil thickened with a soap or other thickening agent. They are used in applications where liquid lubricants are impractical or ineffective.
- Solid Lubricants: Solid lubricants, such as graphite and molybdenum disulfide, are used in extreme conditions where traditional lubricants may fail, such as high temperatures or vacuum environments.
- Dry Lubricants: Dry lubricants, such as PTFE (Teflon) coatings, provide lubrication without the need for a liquid or grease. They are often used in applications where cleanliness is important or where traditional lubricants may attract dirt and debris.
EVALUATION: 1. Define lubricating system
- Mention 4 reasons for lubrication
- Mention 4 uses of lubrication
- State 4 types of lubricants
CLASSWORK: As in evaluation
CONCLUSION: The teacher commends the students positively
