01 How should the centres of the top and bottom ellipses of a cylindrical container be placed?
Answer and explanation
Correct answer: A. On the same axis
Explanation: The governing construction principle is alignment around a central axis. A cylindrical container has one continuous vertical centre line, so the centres of its top and bottom ellipses must lie on that same axis. This keeps the sides balanced and makes the cylinder appear upright. Placing the centres in different directions or outside one another would distort the form; paper edges have no role in the construction.