ISC 2024 Geometrical and Mechanical Drawing Question Paper for Class 12

About this paper

This is the ISC Class 12 Geometrical and Mechanical Drawing paper (code 869) from the 2024 board examination. It carries 80 marks and runs for three hours, with fifteen minutes extra for reading only. Dimensions are in millimetres, and arcs under 4 mm radius may be drawn freehand. Section A is compulsory: front, top and side views of a machine block in first or third angle projection, with the projection symbol. Candidates then attempt either Section B, the assembly of an open bush bearing (sectional elevation, plan, side view and a parts list), or Section C, an isometric copy, a sectional front view and top view, and the projections of a hexagonal-base pyramid of axis height 60 mm.

Exam

ISC Class 12

Subject

Geometrical and Mechanical Drawing

Year

2024

Paper code

869

Maximum marks

80

Time allowed

3 hours + 15 min reading

Questions

3

Pages

5

Answers included

No, questions only

Paper pattern

• Section A

  25 marks

  Question 1: front view, top view and side view of a machine block in first or third angle projection, with the projection symbol

• Section B or Section C

  55 marks

  Attempt one. Section B is the assembly drawing of an open bush bearing (sectional elevation 25, plan 10, left-hand side view 10, parts list 10). Section C is an isometric copy (20), a sectional front view and top view (20), and the projections of a hexagonal-base pyramid (15)

Topics covered

• Orthographic projection
• First and third angle projection
• Sectional views
• Machine-block drawing
• Assembly drawing
• Open bush bearing
• Parts list
• Isometric drawing
• Projection of solids
• Hexagonal pyramid

Questions from this paper

1. Draw the front view, top view and side view of the given machine block by the first or third angle method, and draw the symbol of the method you have chosen.
2. For the open bush bearing, draw a full-size sectional elevation along A–B of the assembled components.
3. Draw the plan of the complete bush-bearing assembly, omitting all hidden details, and make a neat parts list.
4. Copy the isometric view of the given machine block.
5. Draw the sectional front view along A–B and the top view of the given machine block, using the first or third angle method.
6. A hexagonal-base pyramid of axis height 60 mm is given in the top view. Draw the front view and top view when the axis is inclined at 30° to the horizontal plane and the top view of the axis is inclined at 45° to the vertical plane.