Engineering Drawing - Year 1 (ITI Mechanical Group)

Drawing instruments, lettering, dimensioning, geometrical construction, orthographic and isometric projection, and free-hand sketches of tools, fasteners and machine parts.

12 MonthsDuration 5Chapters29Topics

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Syllabus · पाठ्यक्रम

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01Chapter 1: Drawing Instruments, Sheet Layout and Lines 6 topics

Drawing board, T-square, mini-drafter and set squares
Compass, divider, protractor, scales and French curves
Pencil grades and care of instruments
Sheet sizes (A0 to A4) and sheet layout
Border, title block and folding of prints
Types of lines and their uses as per BIS SP 46

02Chapter 2: Lettering, Numbering and Dimensioning 6 topics

Single-stroke vertical and inclined letters
Height and spacing of letters and numbers
Elements of dimensioning: extension line, dimension line, arrow head, leader
Aligned and unidirectional systems
Chain, parallel and combined dimensioning
Dimensioning of circles, arcs, angles and chamfers

03Chapter 3: Geometrical Construction and Scales 5 topics

Bisecting lines and angles, drawing parallel and perpendicular lines
Construction of triangles, squares and regular polygons
Tangents and blending of arcs and lines
Ellipse, parabola and involute (simple methods)
Representative fraction, plain scale and diagonal scale

04Chapter 4: Orthographic Projection 6 topics

Planes of projection and quadrants
First angle and third angle projection and their symbols
Projection of points, lines and planes (simple cases)
Three views of simple blocks and machine parts
Hidden lines and centre lines in views
Missing view and missing line exercises

05Chapter 5: Isometric Projection and Free-hand Sketching 6 topics

Isometric axes, isometric scale and isometric view
Isometric view of blocks with inclined and curved surfaces
Oblique projection (cavalier and cabinet)
Free-hand sketching of hand tools (hammer, spanner, try square)
Free-hand sketches of bolts, nuts, washers, rivets and keys
Proportionate sketching of simple machine parts

About

You will be able to

Use drawing instruments correctly and lay out a drawing sheet with border, title block and standard lines
Write single-stroke lettering and numbers and dimension a drawing as per BIS SP 46
Draw geometrical constructions, polygons, curves and plain and diagonal scales
Draw orthographic views of simple blocks and machine parts in first and third angle projection
Draw isometric views from given orthographic views
Make neat free-hand sketches of hand tools, fasteners and simple machine parts

Who it is for

ITI trainees of Fitter, Welder and Mechanic Motor Vehicle trades - Year 1 (NCVT / DGT CTS)
Learners preparing for the Engineering Drawing paper of the All India Trade Test (AITT)

What you need

Class 8 / 10 pass with basic arithmetic and geometry
Drawing board, mini-drafter or T-square, set squares, compass set, scales and pencils (H, 2H, HB)

Questions

Which syllabus is this course based on?

The NCVT / DGT Craftsmen Training Scheme (NSQF) Engineering Drawing syllabus for mechanical-group trades, Year 1. The centre follows the student's own ITI syllabus where it differs.

Do I need my own drawing instruments?

Yes, a basic set (mini-drafter or T-square, set squares, compass, scale and pencils) is needed for sheet work.

Is CAD taught in this course?

No, Year 1 drawing is done by hand on sheets; it builds the base for reading and drawing machine drawings.

How is the course assessed?

By sheet work marked against a rubric and viva-style questions, as in the ITI practical / AITT pattern.