ENGINEERING GRAPHICS – 310 SYLLABUS FOR CLASS 12

Unit 1: Isometric Projection of Solids

  • Construction of an isometric scale showing main divisions of 10mm and smaller divisions of 1mm, also showing the leading angles.
  • Isometric projection (drawn to isometric scale) of solids such as cube; regular prisms and pyramids (triangular, square, pentagonal, and hexagonal); cone; cylinder; sphere; hemisphere.
  • Base side of the solid should be parallel or perpendicular to HP/VP. The axis of the solid should either be perpendicular to HP/VP or parallel to HP and VP.

Unit 2: Combination of Solids

  • Combination of any two solids mentioned above, with the base side parallel or perpendicular to HP/VP and placed centrally together. The axis of both solids should not be parallel to HP.

Unit 3: Machine Drawing (Machine Parts) – Drawing to Full Size Scale with Instruments

  • Introduction of threads: Standard profiles of screw threads – Square, Knuckle, B.S.W., Metric (external and internal).
  • Bolts: Square head, Hexagonal head.
  • Nuts: Square head, Hexagonal head.
  • Plain washer; combination of nut and bolt with or without washer for assembling two parts together.

Unit 4: Machine Drawing (Machine Parts) – Free-hand Sketches

  • Conventional representation of external and internal threads.
  • Types of studs: Plain stud, Square-neck stud, Collar stud.
  • Types of rivets: Snap head, Flat head, Pan head (without tapered neck), 60° Counter Sunk Flat head.

Unit 5: Machine Drawing (Assembly and Dis-assembly) – Bearings

  • Open-Bearing.
  • Bush-Bearing.

Unit 6: Machine Drawing (Assembly and Dis-assembly) – Rod Joints

  • Cotter-joints for round rods (Sleeve and cotter joint).
  • Cotter-joints for square rods (Gib and cotter joint).

Unit 7: Machine Drawing (Assembly and Dis-assembly) – Tie-rod and Pipe Joint

  • Turnbuckle.
  • Flange pipe joints to be shown.

Note: There will be one Question Paper with 50 questions, out of which 40 questions need to be attempted.

 

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Engineering Graphics (Class 12) Syllabus:

The syllabus for Engineering Graphics aims to provide foundational knowledge in technical drawing and engineering representation, equipping students with skills in precision and design interpretation.

1. Isometric Projection

  • Understanding isometric scales, and principles of isometric projection.
  • Constructing isometric views of simple and complex solids.
  • Creating isometric drawings of objects from orthographic views.

2. Orthographic Projection of Machine Blocks

  • Basics of orthographic projection, including different types of views (front, top, and side).
  • Drawing orthographic projections from pictorial views.
  • Sectional views of machine parts and identifying hidden elements.

3. Machine Drawing

  • Drawing components like bolts, nuts, studs, set screws, and other fastening methods.
  • Assembly drawings: Understanding and drawing assemblies like couplings, pulleys, engine parts, etc.
  • Detailed drawings from assemblies, with a focus on proper labeling and dimensions.

4. Freehand Sketching

  • Freehand sketches of machine parts and mechanical elements.
  • Understanding proportions and dimensions for components and tools.
  • Practice in sketching 3D views and sectional views for technical understanding.

5. Solid Geometry

  • Projections of solids like prisms, pyramids, cylinders, cones, and spheres.
  • Understanding and practicing the projection of solids in different positions.
  • Intersection of solids, including the development of surfaces.

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