SHS2 Applied Technology · Semester 1 Week 2: Introduction to Engine Technology

Lesson notes

Learning Objectives

Indicator: 2.1.1.LI.3 - Describe the construction and operation of the thermostat and pressurized water-cooling systems

By the end of the lesson, learners can:

Identify the main components of a pressurized water-cooling system and state the function of each component.
Describe the construction of a thermostat, including its main parts (valve, spring, wax pellet or bellows) and explain how it controls coolant flow.
Explain the operation of a pressurized water-cooling system, tracing the coolant path from the radiator through the engine and back.
State the purpose of pressurization in a cooling system and explain how the radiator cap and expansion tank maintain system pressure.
Demonstrate safe workshop practices and teamwork while inspecting thermostat and cooling system components during practical activities.

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Curriculum details

Strand: Automotive Technology (Strand 1)
Sub-strand: Introduction to Engine Technology (1.1)
Content standard: 2.1.1.CS.1 - 2.1.1.CS.1 Demonstrate understanding in the working principles of engine cooling and lubrication systems 2.1.1.LO.1 Perform engine cooling and lubrication system inspection, maintenance, diagnosis and repairs with limited supervision
Indicator: 2.1.1.LI.3 - Describe the construction and operation of the thermostat and pressurized water-cooling systems
Suggested placement: Semester 1, Week 2 (Week 2 of the year)
Our suggestion, laid out in curriculum order across three terms of twelve weeks. NaCCA does not fix the week, so follow your school's scheme of learning.
Curriculum reference: NaCCA curriculum document, p. 69

Exemplars (from the NaCCA curriculum)

Problem based Learning: Learners brainstorm in groups with views tolerated from others, to discuss the construction and operation of thermostat and pressurised water-cooling systems on a motor vehicle and present a report for discussions.
Experiential learning: Learners visit a local repair or school workshop to observe the working principle of thermostat and pressurised water cooled engines

Assessment (2.1.1.AS.3). The document marks these depth-of-knowledge levels for this indicator: Level 2 Skills of conceptual understanding; Level 3 Strategic reasoning; Level 4 Extended critical thinking and reasoning.

Teaching and Learning Materials:
- Chart or real object
- Sketches
- Video/YouTube
- Industrial visit