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(CENG103)[2003](s)final~1021^_10021.pdf
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DEPARTMENT OF CHEMICAL ENGINEERING
Hong Kong University of Science and Technology
Final Examination - Fall Semester 2003



CENG 103 - Products and Processes
Monday 15 December 2003. Time 08:30-11:30. Room LG 1031



Instructions to Students

1. Write your NAME, STUDENT ID, COURSE CODE and QUESTION NUMBER on each answer sheet.

2. Answer ALL QUESTIONS and write EACH ANSWER on separate sheets. Do NOT use the left hand side of the paper.

3. The percentage marks are shown with each question.

4. The answers to questions in Part II should commence on a new page.

5. Number all pages.

6. You may use your books and notes.

8. Return examination question sheets with your answers.

9. Read the questions carefully.

10. No discussion or talking is allowed during the examination.













Section A (Each question is worth 10%. Do not spend more than 40 minutes on
this section.)


(1)
Toshiba is recruiting engineers to develop their new microfuel cell program. The microfuel cells are to be designed for use in the companys latest laptop computers. The microfuel cells will replace the Lithium batteries used in the current models. You have just graduated from Chemical Engineering in HKUST, and you are fortunate enough to be shortlisted for an interview.




.
How would you convince the interviewers (consisting of the personnel manager, a product designer, an electrical engineer and a chemist) that you fulfil their requirements?


.
What might these requirements be?


.
During the interview, you are asked to give a brief description of the major features of the potential product. What product attributes would you propose that the microfuel cell should have?




(2)
Lingzhi (Ganoderma Lucidum) is an exotic group of fungi that has been claimed to have medicinal and health enhancing properties. The cultivation and growth of Lingzhi is a time-consuming process that requires extensive manual care and proper conditions for growth. Because of the rarity of the fungi and the labor-intensive cultivation process, Lingzhi products are expensive.




You have just joined a Hong Kong company (Ling-Ling) that has discovered a Lingzhi site in Mount Tai. Lingzhi products include the fungus bodies and spores released from the fungus. The products from mature Lingzhi are then processed in a factory in Shanghai and packaged for sale. The products have a worldwide market, including Hong Kong. Lingzhi is considered mature enough for making into products when its size has grown to about 100 mm diameter. As a chemical engineer, in what forms would you wish to make the products available, bearing in mind that the body of Lingzhi is a hard solid and is barely soluble in water at room temperature, but its solubility is enhanced when the water temperature is increased and/or the surface area decreased. The spores are reas