Technical Drawing SS 3 Second Term Lesson Notes

SS 3 Second Term Technical Drawing Lesson Notes

Below is a structured breakdown of each topic based on your preferred format.

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WEEK 1: REVISION OF PAST WORK

Behavioral Objectives:

By the end of this lesson, students should be able to:

1. Recall key concepts from the previous term.
2. Identify areas that need improvement.
3. Apply previous knowledge to solve technical drawing problems.

Lesson Content:

• Reviewing drawing instruments and materials
• Recap of orthographic and isometric projections
• Revisiting sections, elevations, and symbols
• Solving past exam questions

Evaluation Questions:

1. What is an orthographic projection?
2. List three technical drawing instruments.
3. Why is scaling important in technical drawing?
4. Explain the difference between a section and an elevation.
5. What does a blueprint represent?

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WEEK 2: INTRODUCTION TO COMPUTER-AIDED DESIGN (CAD) AND AUTOCAD

Behavioral Objectives:

By the end of the lesson, students should be able to:

1. Define Computer-Aided Design (CAD)
2. Identify parts of a computer system used in design
3. Perform simple exercises on AutoCAD

Lesson Content:

• Definition of CAD and its importance in technical drawing
• Parts of a computer system used for drafting (CPU, monitor, mouse, keyboard, plotter, scanner)
• Basic AutoCAD commands (Line, Circle, Trim, Extend, Offset)
• Practical: Creating simple shapes using AutoCAD

Evaluation Questions:

1. What does CAD stand for?
2. List two advantages of using AutoCAD over manual drawing.
3. Name three input devices used in CAD software.
4. What is the function of the “Trim” command in AutoCAD?
5. How does AutoCAD improve precision in drawings?

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WEEK 3 & 4: ARCHITRAVES (TYPES & APPLICATIONS)

Behavioral Objectives:

By the end of the lesson, students should be able to:

1. Define an architrave
2. Identify different types of architraves
3. Explain the applications of architraves in building design

Lesson Content:

• Definition of an Architrave – A decorative molding that frames doors and windows
• Types of Architraves:
  • Semi-circular
  • Lancet
  • Segmental
  • Tudor
  • Parabolic
  • Elliptical
  • Flat gauge
• Uses of architraves in structural aesthetics

Evaluation Questions:

1. What is an architrave?
2. Name three types of architraves.
3. Explain the difference between a lancet and segmental architrave.
4. Why are architraves used in construction?
5. Identify one common material used in architrave design.

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WEEK 5: ROOFS – TYPES, STRUCTURE, AND PITCH ANGLE DETERMINATION

Behavioral Objectives:

By the end of the lesson, students should be able to:

1. List different types of roof structures
2. Explain the components of a roof
3. Determine the pitch angle of a roof

Lesson Content:

• Types of Roofs:
  • Gable Roof
  • Hip Roof
  • Flat Roof
  • Mansard Roof
  • Butterfly Roof
  • Pitched Roof
• Parts of a Roof:
  • Rafters
  • Purlins
  • Trusses
  • Battens
  • Ridge beam
• Calculating Pitch Angle: Formula: Pitch (%) = (Rise/Run) × 100

Evaluation Questions:

1. What is the main function of a roof?
2. Name three types of roofs.
3. What is the difference between a gable and hip roof?
4. Define a truss.
5. How do you calculate the pitch of a roof?

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WEEK 6: CONVENTIONAL REPRESENTATION OF MATERIALS AND SYMBOLS

Behavioral Objectives:

By the end of the lesson, students should be able to:

1. Identify standard symbols used in technical drawing
2. Differentiate between various building materials
3. Interpret conventional representations in blueprints

Lesson Content:

• Symbols for common materials
  • Brick
  • Concrete
  • Timber
  • Steel
  • Glass
• Hatching techniques for different materials
• Reading and interpreting symbols in construction drawings

Evaluation Questions:

1. What does a cross-hatched pattern represent in technical drawings?
2. Which symbol represents concrete?
3. What is the function of conventional symbols?
4. How is timber represented in a drawing?
5. Why are standard symbols important in blueprints?

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WEEK 7: BLUEPRINT INTERPRETATION AND USAGE

Behavioral Objectives:

By the end of the lesson, students should be able to:

1. Define a blueprint
2. Explain why blueprints are important in construction
3. Interpret a simple blueprint drawing

Lesson Content:

• Definition of Blueprint – A technical drawing used in construction
• Blueprint Components:
  • Title Block
  • Scale
  • Dimensions
  • Symbols
• Practical Exercise: Interpreting a sample blueprint

Evaluation Questions:

1. What is a blueprint?
2. What information is found in the title block of a blueprint?
3. Why are dimensions important in blueprints?
4. Name two common blueprint symbols.
5. How do blueprints help in construction projects?

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WEEK 8: REVISION & EXAM PREPARATION

Objectives:

• Review all topics covered during the term
• Solve past WAEC and NECO questions on technical drawing
• Provide feedback on difficult areas

Evaluation Questions:

1. List two topics studied this term.
2. What is AutoCAD used for?
3. Explain the importance of a roof’s pitch angle.
4. What are the types of architraves?
5. How are building materials represented in drawings?

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