Lesson Notes By Weeks and Term - Senior Secondary 2

Cooling system components

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TERM – 2ND TERM

WEEK SEVEN

Class: Senior Secondary School 2

Age: 16 years

Duration: 40 minutes of 5 periods each

Date:

Subject: AUTO MECHANICAL

Topic: COOLING SYSTEM COMPONENTS

SPECIFIC OBJECTIVES: At the end of the lesson, pupils should be able to

I.) Define cooling system

II.) Identify parts of cooling system

III.) Describe functions of those parts of the cooling system

INSTRUCTIONAL TECHNIQUES: Identification, explanation, questions and answers, demonstration, videos from source

INSTRUCTIONAL MATERIALS: Videos, loud speaker, textbook, pictures,

INSTRUCTIONAL PROCEDURES

PERIOD 1-2

PRESENTATION

TEACHER’S ACTIVITY

STUDENT’S

ACTIVITY

STEP 1

INTRODUCTION

The teacher explains the meaning of cooling system and identify its parts.

Students listens attentively to the teacher                                                                          

STEP 2

EXPLANATION

Teacher discusses the functions the part of cooling system

Students exhibit attentiveness and active engagement

STEP 3

NOTE TAKING

The teacher writes a summarized

note on the board

The students

copy the note in

their books

 

NOTE

COOLING SYSTEM COMPONENTS

A cooling system is a crucial component in vehicles and machinery that helps regulate the temperature of the engine or equipment by dissipating excess heat generated during operation. It prevents overheating, which can lead to engine damage and failure.

Schematic diagram of cooling system

Parts of a cooling system

The parts of a cooling system in a typical vehicle include:

  1. Radiator: The radiator is a heat exchanger that helps dissipate heat from the engine coolant. It consists of a network of tubes and fins through which coolant flows, allowing heat to transfer from the coolant to the surrounding air.
  2. Coolant: Coolant, also known as antifreeze, is a mixture of water and antifreeze additives. It circulates through the engine, absorbing heat generated by combustion and other processes, and carries it to the radiator for dissipation.
  3. Water Pump: The water pump circulates coolant throughout the cooling system. It is typically driven by a belt connected to the engine crankshaft and forces coolant to flow through the engine block, cylinder head, radiator, and other components.
  4. Thermostat: The thermostat regulates the flow of coolant through the engine to maintain optimal operating temperature. It opens and closes in response to changes in temperature, allowing coolant to flow through the radiator when the engine reaches operating temperature.
  5. Radiator Cap: The radiator cap seals the radiator and maintains system pressure, allowing coolant to reach higher temperatures without boiling. It also allows excess pressure to escape and can act as a reservoir for coolant expansion.
  6. Cooling Fans: Cooling fans help improve airflow through the radiator when the vehicle is stationary or moving at low speeds. They can be electrically or mechanically driven and are controlled by a temperature sensor or switch.
  7. Hoses: Hoses connect various components of the cooling system, such as the radiator, engine, water pump, and heater core, allowing coolant to flow between them.

EVALUATION: 1. What is cooling system?

  1.   Mention 4 parts of the cooling system and discuss their functions

CLASSWORK: As in evaluation

CONCLUSION: The teacher commends the students positively