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IEEN 5303 Fundamentals of Sustainable Engineering   Final Exam   Note: It is NOT allowed to discuss with other students

Mechanical Engineering

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IEEN 5303 Fundamentals of Sustainable Engineering

 

Final Exam

 

Note: It is NOT allowed to discuss with other students. Please make sure your submitted answers are clear to read.

 

1. What further work should be done to better understand the key attributes of LCA? How can this further work be incorporated into existing engineering systems to make LCA a better assessment tool? (10 Points)

 

 

2. Economic Input-output depicts inter-industry relations of an economy. It shows how the output of one industry is an input to each other industry. Please use your own words to summarize its basic economic principle and its applications. (10 Points)

 

 

3. Please describe the limitation of Life Cycle Assessment (10 points)

 

 

4. Please explain how does the difference between function life cycle and performance life cycle cause Life Cycle Mismatch? (15 points)

 

 

5. Coliform bacteria (for example, E. coli) are excreted in large numbers in human and animal feces. Water that meets a standard of less than one coliform per 100 mL is considered safe for human consumption. Is a 1 L water sample that contains 9 coliforms safe for human consumption? (15 points)
6. As a quality control check, a sample of acetone is taken from a process to determine the concentration of suspended particulate matter. An 850-mL sample was placed in a beaker and evaporated. The remaining suspended solids were determined to have a mass of 0.001 g. The specific gravity of acetone is 0.79 g/cm³. (a) Determine the concentration of the sample as mg/L. (b) Determine the concentration of the sample as ppm. (20 points)
7. Calculate the fuel use (in liters) associated with the transport of 2 million pairs of shoes. Assume that air, ship, truck, and train are all used in the transport over the life cycle. Further assume that the amounts of air, ship, truck, and train transport used per pair of shoes are 4.3, 17, 1.0, and 2.7 ton·km/pair. Fuel usages for air, ship, truck, and train transport are 0.42, 0.0049, 0.027, and 0.0065 liters/ ton·km, respectively. (20 points)