Q1. Name two objects around you that were designed in 3D before being manufactured.

• Answer: Chair, bottle (also: car, pencil box, mobile phone).

Q2. What is the main difference between 2D and 3D sketches?

• Answer: 2D shows only height and width, while 3D adds depth to show real appearance.

Q3 (MCQ). A floor plan of a house is an example of:
(a) 2D Design
(b) 3D Design
(c) Real model
(d) Sculpture

• Answer: (a) 2D Design.

Q4. Why do designers make 3D models before manufacturing a product?

Answer: To visualize how the product will look and work in real life.