Draughtsman Mechanical Trade Theory - Year 1 (ITI)

Drawing instruments, lettering, geometrical construction, orthographic, isometric and oblique projection, sections, development of surfaces, fasteners, and basic workshop processes and materials.

12 MonthsDuration 6Chapters31Topics

Enquire now

Syllabus · पाठ्यक्रम

Download PDF

01Unit 1: Drawing Instruments, Lines, Lettering and Dimensioning 5 topics

Safety and drawing office practice
Drawing instruments and their use
Sheet sizes, layout and title block
Types of lines (BIS SP 46)
Lettering and dimensioning practice

02Unit 2: Geometrical Construction and Engineering Curves 5 topics

Lines, angles, polygons and tangents
Conic sections: ellipse, parabola, hyperbola
Cycloid, epicycloid and hypocycloid
Involute and spirals
Helix

03Unit 3: Orthographic, Isometric and Oblique Projection 5 topics

First and third angle projection
Projection of points, lines, planes and solids
Orthographic views of machine parts
Isometric scale and isometric drawing
Oblique drawing: cavalier and cabinet

04Unit 4: Sections and Development of Surfaces 5 topics

Cutting planes and section lines
Full, half, offset, broken and revolved sections
Sections of solids and true shape
Development by parallel line and radial line methods
Development of sheet metal objects (trays, funnels, elbows)

05Unit 5: Fasteners: Threads, Bolts, Nuts, Rivets and Keys 6 topics

Screw thread terms and forms
Conventional representation of threads
Bolts, nuts, studs, screws and washers
Locking devices
Rivets and riveted joints
Keys, cotters and pin joints

06Unit 6: Workshop Processes and Engineering Materials 5 topics

Bench work, fitting and measuring tools
Lathe, drilling and milling (basic)
Welding, casting, forging and sheet metal work
Ferrous metals: cast iron, steel and alloy steels
Non-ferrous metals and alloys, plastics

About

You will be able to

Use drawing instruments, line types, lettering and dimensioning as per BIS SP 46
Draw geometrical constructions and engineering curves
Draw orthographic, isometric and oblique projections of machine parts
Draw sectional views and developments of surfaces
Draw threads, bolts, nuts, rivets, keys and other fasteners in standard proportions
Explain basic workshop processes and properties of engineering materials

Who it is for

ITI Draughtsman Mechanical trainees - Year 1 (NCVT / DGT CTS)
Trainees preparing for the Draughtsman Mechanical trade theory paper of the AITT

What you need

Class 10 pass with mathematics and science
Drawing instruments for sheet work

Questions

Which syllabus does this course follow?

The NCVT / DGT CTS (NSQF) Draughtsman Mechanical Trade Theory syllabus for Year 1. The centre follows the student's own ITI syllabus where it differs.

Is CAD covered in Year 1?

Year 1 theory focuses on manual drafting principles; CAD practice starts in the practical course and continues in Year 2.

Why are workshop processes taught to draughtsmen?

A draughtsman must know how parts are made so that drawings are practical to manufacture.

How is the course assessed?

By chapter tests with multiple-choice questions like the AITT pattern and regular sheet work.