Teaching syllabus for technical drawing

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SENIOR HIGH SCHOOL
– YEAR 3

SECTION 4 (B)

MECHANICAL ENGINEERING DRAWING OPTION

General Objectives The student will
1. understand dimensions, tolerances, limits and fits.
2. acquire skills for freehand sketching.
3. acquire skills for the preparation of working drawings.
4. be aware of the principles in solving drawing problems.
UNIT
SPECIFIC OBJECTIVES
CONTENT
TEACHING AND LEARNING
ACTIVITIES
EVALUATION
UNIT 1

DIMENSIONING AND
TOLEARANCES














UNIT 2

SECTIONING







The student will be able to
4.1.1 explain the terms tolerance, limits and fits.
4.1.2 explain how to dimension drawings.
4.1.3 explain the different types of fits.
4.1.4 apply techniques of dimensioning drawn objects.
4.2.1 explain and differentiate between types of sectioning
4.2.2 draw sectional views of engineering components. Tolerance limits and fits.
Dimensioning drawings Methods of indicating tolerances, limits and fits. Types of fits (clearance fit, transition fit, and interference fit) and their applications.
Dimensioning drawn objects. Differences of sectioning. Types of sectioning Full, half, part, offset, broken, removed, aligned and revolved. Sectional views of engineering components. Using models and charts, group students to discuss tolerance, limits and fits Illustrate how to dimension drawn objects. Guide students to dimension objects correctly by using Data Charts. (A
Shaft/Hole Bases) Discuss and illustrate the different types of fit and their applications using charts. Assist students to dimension drawn objects. Group students to discuss the differences between the types of sectioning using charts and illustrations. Illustrate how to draw sectional views of objects and components using the principles of the various types of sectioning (full, half, broken. Students to explain tolerance, limits and fits. Students to dimension drawn components using Data Chart correctly. Students to sketch various applications of limits and fits. Students to draw the various types of sections. Students to draw sectional views of engineering components.

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