B.E. (Automobile Engineering) Working Drawing GD and T Syllabus - Mumbai University 2026
The University has moved this degree onto NEP 2020 one year at a time. The first and second years are NEP 2020 syllabi; the third and fourth years are still examined on the REV-2019 'C' Scheme, which is what the University sets for them this year.
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Syllabus for Working Drawing- GD & T
Module 0: Prerequisite
Module I: Introduction
- Classification of drawings- machine drawing, production drawing, part drawing, assembly drawing and its types, patent drawing, Need of working drawing, difference between machine drawing and working drawing. Conventional representation (symbols) of materials, conventional representation of machine components – screw threads, welded joints, springs, gears, shafts bearings, knurling, Standard drafting and material abbreviations
Module II: Limits, tolerances and fits
- Limit systems and terms used – tolerance, limits, deviation, actual deviation, upper deviation, lower deviation, allowance, basic size, design size, actual size. Tolerances- graphical illustration of tolerance zones, fundamental tolerances, fundamental deviation, calculation of fundamental shaft deviation, calculation of fundamental hole deviation Fits- types of fits with symbols and applications, hole basis and shaft basis systems
Module III: Surface roughness, Machining symbols, working drawing
- Surface roughness representation, indication of surface roughness, symbols specifying direction of lay, indication of machining allowance and surface roughness allowance on drawings, Reading a working drawing
Module IV: Introduction to GD & T
- What is GD & T, when to use GD & T, advantages of GD & T over Coordinate Dimensioning and Tolerance , Geometric characteristic symbols like- Form, Profile, Orientation, Run out , Location, etc.
Module V: Symbols, Rules and Datums
- Geometric characteristic Symbols The feature control frame Rules Material conditions - Regardless of feature size (RFS), Maximum material condition (MMC), Least material condition (LMC), Material condition symbols and abbreviations. Degrees of freedom and immobilization of a part, application of Datums, datum feature selection, datum feature (inclined, cylindrical, etc.) identification, establishing datums, datum targets
Module VI: Form, orientation and position
- Form- flatness, straightness, circularity, cylindricity Orientation- Parallelism, Perpendicularity, Angularity Position (general) - Specifying the Position Tolerance, Regardless of Feature Size, MMC, Shift Tolerance, LMC
Text Books
- 1 Narayana KL, Kannaiah P, Reddy VK, Machine Drawing, by New Age International Publishers
- 2 Bhatt ND, Machine Drawing, Charotar Publishing House Pvt. Ltd., 50th Edition, ISBN-13: 978 9385039232, 2014
- 1 Cogorno GR, Geometric Dimensioning and Tolerancing for Mechanical Design: A Self-Teaching Guide to ANSI Y 14.5M1982 and ASME Y 14.5M1994 Standards / Edition 1 by The McGraw-Hill Companies, Inc.
- 2 Kampbell RG, Roth ES, Integrated Product Design and Manufacturing Using Geometric Dimensioning and Tolerancing, by Marcel Dekker, Inc.
- 3 Meadows JD, Geometric dimensioning and tolerancing, by B.S Publications. Online Resources:
Reproduced from the University of Mumbai syllabus for B.E. (Automobile Engineering) under NEP 2020, in force from the academic year 2025-26. Wording is as printed in that syllabus. Module numbering is as printed there too.
The complete syllabus
This subject is cut from the University circular for its year. Open a document here if you want the whole thing rather than a single subject.