ISC 2025 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 2025 board examination. It carries 80 marks and runs for three hours plus fifteen minutes of reading time. 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 a drill jig for a 22 mm hole, or Section C, an isometric copy, a sectional front view and top view, and the projections of a square-base prism of axis height 60 mm.

Exam

ISC Class 12

Subject

Geometrical and Mechanical Drawing

Year

2025

Paper code

869

Maximum marks

80

Time allowed

3 hours + 15 min reading

Questions

3

Pages

6

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 a drill jig (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 square-base prism (15)

Topics covered

• Orthographic projection
• First and third angle projection
• Sectional views
• Machine-block drawing
• Assembly drawing
• Drill jig
• Parts list
• Isometric drawing
• Projection of solids
• Square prism

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. The drill jig is used to produce a circular hole of diameter 22 mm. Draw a full-size sectional elevation along A–B of the assembled components.
3. Draw the left-hand side view of the drill-jig 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 square-base prism 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, omitting hidden details.