htciversion3.3 - Draft Heat Transfer Concept Inventory...

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1 Draft Heat Transfer Concept Inventory Version 3.3 April 20, 2006 This is a draft Heat Transfer Concept Inventory developed by a team of faculty at the University of Wisconsin (Martin, Mitchell, and Pfefferkorn) and the University of Illinois (Jacobi and Newell). The purpose of the inventory is to evaluate whether students understand the concepts in a course, as opposed to be able to do calculations. Concept Inventories have been and are being developed for a number of topics in engineering and physics. The results of inventories have been used to improve the way courses are taught. We anticipate that we will eventually use the results of this inventory to improve instruction in heat transfer and related courses. The inventory will probably take about an hour or so complete. The questions are multiple choice and we would like you to try to answer each question based on your knowledge. Please do not use a text to help answer the question – we want to find out what you think about the question. Feel free to draw or write on scratch paper to help you answer the questions. Enter your name on the bubble sheet also. If you have not taken a heat transfer class, you may not have been exposed to material relevant to some of the questions. We’d like you to use your intuition to try to answer the questions anyway.
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2 1. How much time did it take you to complete the Concept Inventory? A. Less than 1/2 hour B. Between 1/2 and 1 hour C. Between 1 and 1 1/2 hours D. Over 1 and 1 1/2 hours 2. How well do you think that your score on this Concept Inventory reflects your understanding of Heat Transfer? A Not at all - I did not have time to give this an adequate effort B Somewhat - I tried but was not really focused on providing the best answers C Reasonably accurate - I might have done better with more effort D Quite well - I did my best to answer all of the questions.
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3 3. Consider two solid metal bodies, 1 and 2 as shown below, suspended in a room. The temperature of body 1 is initially higher than that of body 2. Circle the letter of the correct statement for the ‘conservation of energy’ for body 1 : A The rate at which energy enters Body 1 must equal the rate at which it leaves Body 1 B The rate at which energy is stored in Body 1 must equal the rate at which it enters, minus the rate at which it leaves, plus the rate of internal generation. C The rate at which energy passes from Body 1 to Body 2 exceeds the rate at which it passes from Body 2 to Body 1 . D For exchange between Body 1 and Body 2, no energy leaks to the environment from Body 1 or Body 2; thus, energy is conserved. Body 1 T 1 Body 2 T 2
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4 4. Warm air flows over a cool flat plate that has a uniform surface temperature as shown schematically below. Circle the letter of the curve that most closely describes the variation of the local heat flux (heat flow per unit area) with position along the plate.
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htciversion3.3 - Draft Heat Transfer Concept Inventory...

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