Engineering Drawing

Engineering Drawing is the "logical" graphic language used to communicate the requirements for technical objects and "circuit-based technical materials". It provides the "technical clarity" necessary to translate abstract design concepts into physical hardware with precise dimensions and specifications.

Engineering Drawing

Course Title: Engineering Drawing

Course No: ENME 101

Nature of the Course: Theory + Lab

Semester: 1

Full Marks: 20 + 30 + 50

Pass Marks: 8 + 12 + 20

Credit Hours: 3

Course Description

Engineering Drawing covers instrumental drawing, dimensioning, geometrical construction, descriptive geometry, multi-view orthographic projections, developments, intersections, and pictorial drawings including isometric, oblique and perspective projection.

Course Objectives

To develop basic projection concepts with reference to points, lines, planes and geometrical solids. Also, to develop sketching and drafting skills to facilitate communication.

Course Contents

1. Instrumental Drawing, Technical Lettering Practices and Techniques

1 hrs

1.1. Equipment, materials and drawing sheets

1.2. Description of drawing instruments, auxiliary equipment and drawing materials

1.3. Techniques of instrumental drawing

1.4. Pencil sharpening, securing paper, proper use of T-squares, triangles, scales dividers, compasses, erasing shields, French curves, inking pens

1.5. Line: Types and uses, thickness

2. Dimensioning

1 hrs

2.1. Fundamentals and techniques

2.2. Size and location dimensioning, SI conversions

2.3. Scales: Types and representative factor

2.4. Use of scales, measurement units, reducing and enlarging drawings

2.5. Placement of dimensions: Aligned and unidirectional, chain, parallel/baseline and combined type

2.6. Tolerance dimensioning

3. Geometrical Construction

2 hrs

3.1. Plane geometrical construction: Proportional division of lines, trisection of angles, smooth arc and line tangents

3.2. Methods for drawing regular polygons and standard curves such as ellipses, parabolas, hyperbolas, involutes, spirals, cycloids and helices (Cylindrical and conical), ogee curve

3.3. Techniques to reproduce a given drawing (By construction)

4. Basic Descriptive Geometry

4 hrs

4.1. Introduction to orthographic projection, principal planes, four quadrants or angles

4.2. Projection of points on first, second, third and fourth quadrants

4.3. Projection of lines: Parallel to one of the principal planes, inclined to one of the principal plane and parallel to other, Inclined to both principal planes, traces of a line

4.4. Projection planes: Perpendicular to both principal planes, parallel to one of the principal planes and Inclined to one of the principal planes, perpendicular to other and Inclined to both principal planes

4.5. True length of lines: Horizontal, inclined and oblique lines

4.6. Rules for parallel and perpendicular lines

4.7. Point view or end view of a line

4.8. Shortest distance from a point to a line

4.9. Edge view and true shape of an oblique plane

4.10. Angle between two intersecting lines

4.11. Intersection of a line and a plane, visible portion of line

4.12. Angle between a line and a plane

4.13. Dihedral angle between two planes

4.14. Shortest distance between two skew lines

4.15. Angle between two non-intersecting (Skew) lines

5. Multi View (Orthographic) Projections

8 hrs

5.1. Orthographic projections

First and third angle projection

Principal views: Methods for obtaining orthographic views, projection of lines, angles and plane surfaces, analysis in three views, projection of curved lines and surfaces, object orientation and selection of views for best representation, full and hidden

Orthographic drawings: Making an orthographic drawing, visualizing objects (Pictorial view) from the given views

Interpretation of adjacent areas, true-length lines, representation of holes, conventional practices

5.2. Sectional views: Full, half, offset, broken (Partial), rotated/aligned, revolved, removed (Detail) sections, phantom of hidden section, specifying cutting planes for sections, convention practices

5.3. Auxiliary views: Basic concept and use, drawing methods and types, symmetrical and unilateral auxiliary views, auxiliary sectional views

6. Developments and Intersections

7 hrs

6.1. Introduction and projection of solids with points transfer

6.2. Developments

General concepts and practical considerations, triangulation method for approximate development of surfaces of a right/oblique; Prism, cylinder, pyramid, cone, prism and cylinder cut by oblique planes, frustum/truncated pyramid and cone

transition pieces for connecting different shapes and sphere

6.3. Intersections

Lines of intersection of geometric surfaces, piercing point of a line and a geometric solid, intersection lines of two planes, intersections of prism and prism, cylinder and prism, cylinder and cylinder, pyramid and prism

cone and prism, pyramid and cylinder, cone and cylinder

7. Pictorial Drawings

7 hrs

7.1. Classifications: Advantages and disadvantages

7.2. Isometric view

Axonometric projection

Isometric projection and isometric drawing (View)

Isometric and non-isometric lines; Isometric and non-isometric surfaces

Angles in isometric drawing

Circles and circular arcs in isometric and non-isometric surfaces (Slopes)

Irregular curves in isometric drawing

Isometric sectional views

7.3. Oblique drawing

Procedure for making an oblique drawing

Rules for placing objects in oblique drawing

Angles, circles and circular arcs in oblique drawing

7.4. Perspective projection

Terms used in perspective projection

Parallel and angular perspective

Selection of station point

Perspective projection of right prism and pyramid solid

Laboratory Works

60 hours of practical sessions covering drawing sheet layout, lettering, geometrical construction, descriptive geometry, multiview drawings, sectional and auxiliary views, surface development, intersection of solids, isometric, oblique and perspective dra

1.Drawing sheet layout, freehand lettering, scale, common graphical symbols, sketching of parallel lines, circles, dimensioning
2.Geometrical construction (Sketch and instrumental drawing)
3.Descriptive geometry I (Sketch and instrumental drawing)
4.Descriptive geometry II (Sketch and instrumental drawing)
5.Multiview drawings I (Sketch and instrumental drawing)
6.Multiview drawings II (Sketch and instrumental drawing)
7.Multiview, sectional drawings and dimensioning (Sketch and instrumental drawing)
8.Auxiliary view, sectional drawings and dimensioning (Sketch and instrumental drawing)
9.Projection of regular geometrical solids with point transfer (Sketch and instrumental drawing)
10.Surface development of solids I (Sketch and instrumental drawing)
11.Surface development of solids II (Sketch and instrumental drawing)
12.Intersection of solids (Sketch and instrumental drawing)
13.Isometric drawing I (Sketch and instrumental drawing)
14.Isometric drawing II (Sketch and instrumental drawing)
15.Oblique drawing and perspective projection (Sketch and instrumental drawing)

Reference Books

1.Luzadder, W.J., Duff, J.M. (1989). Fundamentals of engineering drawing: With an introduction to interactive computer graphics for design and production (Latest Edition). Prentice-Hall.
2.French, T.E., Vierck, C.J., Foster, R.J. (1993). Engineering drawing and graphic technology (Latest Edition). McGraw-Hill.
3.Giesecke, F.E., Mitchell, A., Spencer, H.C., Dygdon, J.T. (2016). Technical drawing with engineering graphics. Peachpit Press.
4.Bhatt, N.D. (2023). Elementary engineering drawing. Charotar Publishing House.
5.Gill, P.S. (2016). Engineering drawing. S. K. Kataria & Sons.
6.Dhawan, R.K. (2019). A textbook of engineering drawing. S. Chand and Company.
7.Luintel, M. C. (2021). Engineering Drawing I. Heritage Publishers & Distributors.
8.Luintel, M. C. (2020). Engineering Drawing II. Heritage Publishers & Distributors.

Notes:

This syllabus follows the official BEI curriculum of Tribhuvan University. In case of any doubt or revision, the university’s published syllabus shall be considered authoritative. https://ioe.tu.edu.np/pages/electronics-engineering-curriculum-structure-2660

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