# CBSE Class 12 Engineering Graphics Syllabus 2023 – Chapters, Topics, Weightage

Are you looking for CBSE Class 12 Engineering Graphics Syllabus 2023 Chapters, Topics, Weightage is available in this article. All the information is similar to the Central Board Of Secondary Education. CBSE changing the Syllabus (सीबीएसई कक्षा 12 इंजीनियरिंग ग्राफिक्स पाठ्यक्रम) Year to year. So we will provide the latest syllabus updates also. In this article provide a CBSE Class 12 Engineering Graphics Syllabus structure in the academic year of 2020. You can download the CBSE Class 12 Engineering Graphics Syllabus PDF here.

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## CBSE Class 12 Engineering Graphics Syllabus 2023

Units Names, Marks, and the Periods were mentioned below in a table format for the candidates to understand. And, the PDF was also mentioned below.

 S.No Unit Name Marks Periods I Isometric Projections of Solids 25 40 II Machine Drawing A. Drawing of Machine parts B. Assembly Drawing and Dis-assembly drawings 1. Bearings 2. Rod joints 3. Tie-rod and Pipe joint 45 75 Practical 30 45 Total Marks 100 160

• Isometric Projection of Solids
• Machine Drawing
• Practical

### CBSE Class12 Engineering Graphics Syllabus Mark Weightage

 S. No. Unit Marks 1 Isometric Projection of Solids 25 2 Machine Drawing 1. Drawing of Machine parts 2. Assembly Drawing and Dis-assembly drawings a)Bearings b)Rod’s joints c)Tie-rod and pipe joints d)Couplings 45 Practical 30 Total Marks 100

The time of an examination is 3 hours  and marks are 100

### Units in CBSE Class 12 Engineering Graphics & No. of Periods

Isometric Projection of Solids-(50 Periods)

Machine Drawing-(118 Periods)

1. Drawing of Machine parts
2. Assembly Drawing and Dis-assembly drawings
a) Bearings
b) Rod joints
c) Tie-rod and pipe joints
d) Couplings

Practical-(78 Periods)

### Engineering Graphics Chapters & Topics in CBSE Class 12

Unit 1: Isometric Projection of Solids (50 Periods)

• Construction of isometric scale showing main divisions of 10mm and smaller divisions of 1mm, also showing the leading angles. Drawing helping view/s such as triangles, pentagon, hexagon, etc., using an isometric scale.
• Isometric projections (drawn to isometric scale) of solids such as a cube, regular prism and pyramids (triangular, square, pentagonal, and hexagonal), cone, cylinder, sphere, hemisphere, frustum of right regular pyramids (triangular, square, pentagonal, hexagonal) and cone, when they are cut by a plane parallel to the base. The axis and the base side of the solid should be either perpendicular to HP / VP or parallel to HP and VP. (Indicate the direction of viewing)
• Combination of two solids (except “frustum” of Pyramids and Cone) Keeping the base side parallel or perpendicular to HP/VP and placed centrally together, the axis of both the solids should not be given parallel to HP.

Unit 2: Machine Drawing

1. Drawing of machine parts
• Drawing to a full-size scale with instruments.
• (Internal choice will be given between any two of the following).
• Introduction of threads: Standard profiles of screw threads square, knuckle, B.S.W.,
• Metric (external and internal). Bolts (Square, Hexagonal, Tee and Hook);
• Nuts: (Square and Hexagonal), Plain washer, a combination of nut and bolt with or without washer for assembling two parts together, Single riveted lap joint with standard dimensions.
• Free-hand sketches
• (Internal choice will be given between any two of the following).
1. Assembly drawings and Dis-Assembly drawings (Internal choice will be given between an Assembly drawing and a Dis-Assembly drawing).
2. Bearings
• Open-Bearing
• Bushed-Bearing
1. Rod-Joints
• Cotter-joints for circular-rods (socket and spigot joint)
• Cotter-joints for round-rods (sleeve and cotter joint)
• Cotter-joints for square rods (Gib and cotter-joint)
1. Tie-rod and Pipe-joint
• Turnbuckle
• Flange pipe joint
1. Couplings
• Unprotected Flange Coupling (having socket and spigot arrangement)
• Protected Flange Coupling
1. Pulleys
• Solid cast iron pulley – (up to 200 mm diameters) having a solid web

PRACTICALS

• One paper (Practical): 3 Hours
• To perform the following tasks from the given views of the prescribed Machine
• Block (One).
• Value-Points

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