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Unformatted text preview: Final Exam, ENSC 100, 1200-1500, Dec 12, 2004 Name: Group: Student Number: This is a closed-book exam. You may not consult any written material of any kind during the examination. All questions are multiple choice and are worth three points. There is exactly one correct answer to each question. One point will be deducted for each incorrect answer. You may circle as many answers as you like to each question. Note that there is NO Question 29. You are automatically credited with 3 bonus marks to make up for this. Mark your answers directly on the exam sheet. 1. According to the first few lectures in the course, which of the following is not a possible explanation for the slow pace of engineering progress over the period 35,000 BC to 10,000 BC? a) Engineers at that period had small brains 2. Archimedes was employed in the city of d) Syracuse 3. The word ‘engineer’ originates from: b) A Latin word meaning ‘siege engine’ 4. When the operation of weaving was first mechanised, the weavers began to work in large buildings called ‘mills’ rather than in their own cottages. This was because: c) it was impossible to make efficient cottage-scale steam engines 5. Between 1880 and 1930, the number of engineers in North America: c) Increased tenfold 6. Teledeltos paper is an electrically-conducting form of paper. Engineers used to cut shapes from this paper, attach appropriate current and voltage sources to it, and, by measur- ing the electrical potential at various points on the paper, draw conclusions about the temperature that would be measured at the corresponding points in a thermal system. In doing this, they were using the paper as: c) an analog computer 1 7. When applying the results of a wind-tunnel test in a scale model to predicting the performance of a real plane, we need to enforce dynamic similarity between the model and the plane. This means that: d) the important forces experienced by the model must be in the same ratio to each other as the corresponding forces experienced by the plane 8. Imagine a collection of gas molecules inside a closed container. Each molecule has a different speed and direction of motion. Now imagine that we have a magical device that lines up the directions of motion of each molecule, so that each molecule retains its original speed, but is now moving due North. As a result of this change, the gas inside the container: c) has the same energy but lower entropy 9. According to the ‘thermodynamics’ lecture, one important factor often omitted in com- paring the efficiencies of electric and gas-powered vehicles for the Canadian market is: c) gas-powered vehicles provide heat to keep the passengers warm 10. A sadistic engineering professor has set a multiple-choice exam with 50 multiple-choice questions, in which each question has 64 possible answers. What is the minimum numberquestions, in which each question has 64 possible answers....
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