​Technical Drawing

Presentation & Practice



Book description

This book was packaged to help students acquire requisite knowledge and practical skills in engineering/technical drawing practices. The contents were designed to prepare students for technical, diploma and degree examinations in engineering, engineering technology and technical vocations in other professions in the monotechnics, polytechnics and universities. Emphasis is placed on media drafting, lettering, and alphabet of lines, geometric construction, sketching, and multiview drawings.

​Table of content

Dedication. v

Acknowledgements. vi

Preface. x

SECTION 1                     Drawing Presentation.. xiii

Chapter 1                 Introduction to Technical Drawing.. 1    ​​N399.00  ($1)

1.1          Introduction. 1

1.2          ​Drawing. 1

1.3          Drawing language and standards. 2

1.4          Aim of drawing.. 3

1.5          Types of drawing and views. 3

1.6          Engineering drawing requirements. 4

1.7          Professional application of technical drawing.. 5

1.8          Technical drawing and agricultural development 5

1.9          Steps to planning drawing.. 6

Exercise. 6

Chapter 2                 Drafting and Drawing Presentation. 7    ​​N399.00  ($1)

2.1          Introduction to drafting.. 7

2.2          Drafting tools. 7

2.3          Importance of drafting.. 8

2.4          Drafting practices. 9

2.5          Drafting aids/instruments. 10

2.6          Using the instruments. 22

2.7          Drawing reproduction. 31

2.8          Scales in drawing.. 32

2.9          Components of drawing.. 39

Exercise. 40

Chapter 3                Lettering Principles and Practice. 44    ​​N399.00  ($1)

3.1          Introduction. 44

3.2          Importance of lettering.. 44

3.3          Types of lettering.. 44

3.4          Style of lettering.. 45

3.5          Lettering fonts in drawing.. 45

3.6          Lines in lettering.. 45

3.7          Lettering practice. 46

3.8          Drawing lettering lines. 47

Exercise. 48

Chapter 4       Principles of Dimensioning.. 50    ​​N399.00  ($1)

4.1          Importance of dimensioning.. 50

4.2          Guidelines for dimensioning.. 50

4.3          Types of dimensions. 50

4.4          Components of dimension. 51

4.5          Dimension placement 51

4.6          Rules of dimension. 54

4.7          Types of dimensioning.. 56

4.8          Dimensioning best practices. 65

Exercise. 65

SECTION 2     Drawing Geometry & Projections.. 68

Introduction. 70

Chapter 5                     Geometrical Figures: Properties and Construction. 72    ​​N399.00  ($1)

5.1          Introduction. 72

5.2          Point 72

5.3          Lines, properties, application and construction. 73

5.3.1      Line styles. 74

5.3.2      Forms of lines. 75

5.3.3      Types of lines. 75

5.3.4      Line applications. 77

5.3.5      Line drawing.. 78

5.3.6      Line construction. 80

5.3.7      Loci: Properties and construction. 86

5.4          Plane and solid loci 89

5.5          Plane figures. 90

5.5.1      Angles and their properties. 91

5.5.2      Triangles, their properties and construction. 93

5.6          Quadrilaterals, their properties and construction. 99

5.7          Polygon, their properties and construction. 102

5.8          Circles, their properties and construction. 108

5.8.1      Circle geometry. 112

5.8.2      Tangency and normalcy construction. 118

Exercise. 123

Chapter 6                Projections in Engineering Drawings. 128    ​​N399.00  ($1)

6.1          Drawing presentation. 128

6.2          Features of projection. 130

6.3          Projection of points. 132

6.4          Projection of lines. 132

Chapter 7                      Descriptive Geometry. 139    ​​N399.00  ($1)

7.1          Introduction. 139

7.2          Orthographic projection. 139

7.3          Multiview projection. 141

7.4          Principles of first angle orthographic projection. 149

7.5          Principles of third angle orthographic projection. 154

7.6          Symbols for orthographic projection. 157

7.7          Comparing 1st and 3rd angle projection. 158

6.5          Auxiliary projection. 158

Exercise. 166

Chapter 8                 Pictorial Drawing and Construction. 168    ​​N399.00  ($1)

8.1          Introduction. 168

8.2          Projection of pictorial drawing.. 168

8.3          Isometric drawing.. 169

8.4          Oblique drawing.. 174

8.5          Axonometric drawing.. 176

8.6          Perspective drawing.. 177

8.7          Diametric drawing.. 182

8.8          Model building drawings. 182

8.9          Assembly drawings. 184

8.10        Sketch drawings. 186

8.11        Comparing projections. 193

Exercise. 194

SECTION 3     Conic Sections & Surface Development. 197

Introduction. 199

Chapter 9                    Conic Sections and Construction. 200    ​​N399.00  ($1)

9.1          Introduction. 200

9.2          Construction of conic sections. 203

9.2.1      Ellipse and its construction. 203

9.2.2      Hyperbola and its construction. 217

9.2.3      Parabola and its construction. 221

Exercise. 227

Chapter 10                       Solid Sections and Development 229    ​​N399.00  ($1)

10.1        Introduction. 229

10.2        Types of sections. 232

10.3        Hatching.. 236

10.4        Sections of solid.. 239

10.5        Surface development 247

10.5.1         Full surface development of geometrical solids. 248

10.5.2         Development of lower surfaces of geometrical solids. 250

10.5.3         Interpenetration of surfaces. 256

Exercise. 263

References. 265

Notes. 266

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