Critical Thinking Questions 1. Describe an occasion in which an explanatory sketch would be used.

2. While it seems rather obvious that engineers need to consider the end user, how might this perspective get lost in the design process?

3. Give an example of a product in which ductility would be a particularly important factor. Explain your answer.

4. Why might a prototype be built with different materials than those used in the final product?

5. Which of the careers in engineering discussed in the unit appeals to you the most and why?