BT-105 Engineering Graphics is one of the most important foundation subjects for first-year B.Tech. students under Rajiv Gandhi Proudyogiki Vishwavidyalaya (RGPV).
The subject BT-105 Engineering Graphics builds the visual language of engineers — the ability to read, interpret, and create technical drawings used in design, manufacturing, civil works, and electrical systems.
Traditional Engineering Graphics: Principles of Engineering Graphics; Orthographic Projection; Descriptive Geometry; Drawing Principles; Isometric Projection; Surface Development; Perspective; Reading a Drawing; Sectional Views; Dimensioning & Tolerances; True Length, Angle; intersection, Shortest Distance.
Computer Graphics: Engineering Graphics Software; -Spatial Transformations; Orthographic Projections; Model Viewing; Co-ordinate Systems; Multi-view Projection; Exploded Assembly; Model Viewing; Animation; Spatial Manipulation; Surface Modelling; Solid Modelling; Introduction to Building Information Modelling (BIM)
Course Contents:
Unit-I BT-105 Engineering Graphics
Introduction to Engineering Drawing covering, Principles of Engineering Graphics and their significance, usage of Drawing instruments, lettering, Conic sections including the Rectangular Hyperbola (General method only); Cycloid, Epicycloid, Hypocycloid and Involute; Scales – Plain, Diagonal and Vernier Scales.
Unit-II BT-105 Engineering Graphics
Orthographic Projections covering, Principles of Orthographic Projections- Conventions – Projections of Points and lines inclined to both planes; Projections of planes inclined Planes – Auxiliary Planes.
Unit-III BT-105 Engineering Graphics
Projections of Regular Solids covering, those inclined to both the Planes- Auxiliary Views; Draw simple annotation, dimensioning and scale. Floor plans that include: windows, doors, and fixtures such as WC, bath, sink, shower, etc.
Unit-IV BT-105 Engineering Graphics
Sections and Sectional Views of Right Angular Solids covering, Prism, Cylinder, Pyramid, Cone – Auxiliary Views; Development of surfaces of Right Regular Solids – Prism, Pyramid, Cylinder and Cone; Draw the sectional orthographic views of geometrical solids, objects from industry and dwellings (foundation to slab only)
Unit-V BT-105 Engineering Graphics
Isometric Projections covering, Principles of Isometric projection – Isometric Scale, Isometric Views, Conventions; Isometric Views of lines, Planes, Simple and compound Solids Conversion of Isometric Views to Orthographic Views and Vice-versa, Conventions.
Unit-VI BT-105 Engineering Graphics
Overview of Computer Graphics covering, listing the computer technologies that impact on graphical communication, Demonstrating knowledge of the theory of CAD software [such as: The Menu System, Toolbars (Standard, Object Properties, Draw, Modify and Dimension), Drawing Area (Background, Crosshairs, Coordinate System), Dialog boxes and windows, Shortcut menus (Button Bars), The Command Line (where applicable), The Status Bar, Different methods of zoom as used in CAD, Select and erase objects.; Isometric Views of lines, Planes, Simple and compound Solids]
Unit-VII BT-105 Engineering Graphics
Customization & CAD Drawing consisting of set up of the drawing page and the printer, including scale settings, Setting up of units and drawing limits; ISO and ANSI standards for coordinate dimensioning and tolerancing; Orthographic constraints, Snap to objects manually and automatically; Producing drawings by using various coordinate input entry methods to draw straight lines, Applying various ways of drawing circles.
Unit-VIII BT-105 Engineering Graphics
Annotations, layering & other functions covering applying dimensions to objects, applying annotations to drawings; Setting up and use of Layers, layers to create drawings, Create, edit and use customized layers; Changing line lengths through modifying existing lines (extend/lengthen); Printing documents to paper using the print command; orthographic projection techniques; Drawing sectional views of composite right regular geometric solids and project the true shape of the sectioned surface; Drawing annotation, Computer-aided design (CAD) software modeling of parts and assemblies. Parametric and non-parametric solid, surface, and wireframe models. Part editing and two-dimensional documentation of models. Planar projection theory, including sketching of perspective, isometric, Multiview, auxiliary, and section views. Spatial visualization exercises. Dimensioning guidelines, tolerancing techniques; dimensioning and scale multi views of dwelling;
Unit-IX BT-105 Engineering Graphics
Demonstration of a simple team design project that illustrates Geometry and topology of engineered components: creation of engineering models and their presentation in standard 2D blueprint form and as 3D wire-frame and shaded solids; meshed topologies for engineering analysis and toolpath generation for component manufacture; geometric dimensioning and tolerancing; Use of solid modeling software for creating associative models at the component and assembly levels; floor plans that include: windows, doors, and fixtures such as WC, bath, sink, shower, etc. Applying colour coding according to building drawing practice; Drawing sectional elevation showing foundation to ceiling; Introduction to Building Information Modelling (BIM).
Course Objective:
All phases of manufacturing or construction require the conversion of new ideas and design concepts into the basic line language of graphics. Therefore, there are many areas (civil, mechanical, electrical, architectural and industrial) in which the skills of the CAD technicians play major roles in the design and development of new products or construction. Students prepare for actual work situations through practical training in a new state-of-the-art computer designed CAD laboratory using engineering software. This course is designed to address:
- To prepare you to design a system, component, or process to meet desired needs within realistic constraints such as economic, environmental, social, political, ethical, health and safety, manufacturability, and sustainability
- To prepare you to communicate effectively
- To prepare you to use the techniques, skills, and modern engineering tools necessary for engineering practice
Goals & Outcomes:
Introduction to engineering design and its place in society
- Exposure to the visual aspects of engineering design
- Exposure to engineering graphics standards
- Exposure to solid modelling
- Exposure to computer-aided geometric design
- Exposure to creating working drawings
- Exposure to engineering communication
Text/Reference Books:
- Bhatt N.D., Panchal V.M. & Ingle P.R., (2014), Engineering Drawing, Charotar
Publishing House - Shah, M.B. & Rana B.C. (2008), Engineering Drawing and Computer Graphics,
Pearson Education - Agrawal B. & Agrawal C. M. (2012), Engineering Graphics, TMH Publication
- Narayana, K.L. & P Kannaiah (2008), Text book on Engineering Drawing, Scitech
Publishers - (Corresponding set of) CAD Software Theory and User Manuals
Important Questions of BT-105 Engineering Graphics
Q1. Compare diagonal scale and Vernier scale in terms of construction and precision. Provide a situation in engineering where each is used.
Q2. A water tank of size 27 m3 was represented in the drawing by 216 cm3 size. Construct a Vernier Scale for the same to measure up to 5 meter. Also show on it the distance of 3.95 meter and 0.042 meter.
Q4. A coin 30 mm diameter rolls on a straight line on a table. Plot and name the locus of a point lying on the circumference for one complete revolution.
Q5. A line AB 70 mm long is inclined at an angle of 30° to HP. Its end A is 10 mm above the HP and 15 mm infront of VP. The front view is 50 mm. Draw the projection of line AB.
Q6. Draw the projection of a regular hexagonal lamina of 30 mun side having one of its edge in the VP and inclined at 60° to HP and the surface-making an angle of 40° with the VP.
Q7. Write about Dialog boxes and Windows in CAD software.
Q8. Draw the projection of a hexagonal prism base 30 mm and axis 75 mm long when its axis is inclined at 30o to the VP and parallel to HP and edge of the base is perpendicular to HP.
Q9. What is meant by projection? Explain the Principal of projection and differentiate between First angle projection and Third angle projection.
Q10. A hexagonal Pyramid side of base 30mm and axis 60 mm long rest with its base on HP and one of the edge of its base is parallel VP, It is cut by a horizontal section plane at a distance of 38 mm above the base. Draw, its Front view and Sectional Top View.
Q11. Discuss how CAD software supports the visualization and creation of complex 3D objects such as compound solids. Include references to specific tools or features.
Q12. Draw the Floor plan of a single BHK house showing all details like window, doors and other fixtures. Assume suitable dimension for plan.
Q13. Discuss the construction and use of an Isometric Scale.
Q14. rite short notes on any three of the following.
i) Epicycloid
ii) Tracesofaline
iii) Tool bar
iv) View ports
Q15. The distance between two stations is 100 km and on a road map it is shown by 30 cm. Draw a diagonal scale and indicate 46.8 km and 32.4 km on it.
Q16. A thread is unwinds itself from a cylindrical drum of 60 mm in radius. Draw the locus of the free end of the thread for unwinding through an angle of 180°.
Q17. Differentiate between the first angles and third angles projection.
Q18. A line AB 120 mm long is inclined at 45° to HP and 30° to the VP. It’s midpoint P is in VP and 20 mm above HP. The end A is in the third quadrant and B is in the first quadrant. Draw the projections of the line AB.
Q19. Explain layering concept with examples. How is it implemented in CAD software?
Q20. Draw the projections of a regular hexagon of 25mm side having one of its sides in the H.P. and inclined at 60 to the V.P. and its surface making an angle of 45° with the HP.
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