ED1 (Diploma Electronics & Communication Engineering 1st-2nd)

1. Introduction to Free Hand Sketching and Lettering

1.1 Drawing instruments, material & layout of drawing sheets.

1.2 Different types of lines & arrow heads in Engineering drawing as per

BIS specifications

1.3 Practice of free hand sketching of vertical, horizontal and inclined

 lines, geometrical figures such as triangles, rectangles, circles,

ellipses and curves

2. Lettering Technique and Practice (01 sheets)

2.1 Instrumental single stroke lettering of 35 mm and 70 mm height in

the ratio of 7:4

 2.2 Free hand lettering (Alphabet and numerals )- lower case and

upper case, single stroke, vertical and inclined at 75 degree in

different standards, series of 3, 5, 8 and 12 mm heights in the

ratio of 7:4

3. Dimensioning Technique (01 sheet)

 3.1 Necessity of dimensioning, method and principles of dimensioning

 (mainly theoretical instructions)

 3.2 Dimensioning of overall sizes, circles, threaded holes, chamfered

 surfaces, angles, tapered surfaces, holes, equally spaced on

P.C.D., counter sink holes, counter bored holes, cylindrical parts,

narrow spaces and gaps, radii, curves and arches

Section-II

4. Scales (01 sheets)

 4.1 Scales - their need and importance (Theoretical instructions).

 4.2 Drawing of plain and diagonal

5. Projection (04 sheets)

 5.1 Introduction to 1st angle projection and 3rd angle projection 

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 5.2 Drawing 3 views of given objects (Non-symmetrical objects may be

 selected for this exercise)

 5.3 Identification of surfaces and exercises on missing surfaces and

views

6. Sections (02 sheets)

6.1 Importance and salient features, Methods of representing sections,

conventional sections of various materials, classification of

sections, conventions in sectioning

6.2 Drawing of full section, half section, partial or broken out sections,

Offset sections, revolved sections and removed sections.

6.3 Drawing of different conventions for materials in section,

conventional breaks for shafts, pipes, rectangular, square, angle,

channel, rolled sections

6.4 Exercises on sectional views of different objects.

7. Isometric Views (02 sheets)

 7.1 Fundamentals of isometric projections (Theoretical instructions)

 7.2 Isometric views from 2 or 3 given orthographic views.