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Temperature & Heat in Engineering Chapter Exam

Practice Exam Instructions:

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

Page 1

Question 1 1. Why does water expand when it changes from liquid to solid?

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Question 2 2. The first law of thermodynamics states that:

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Question 3 3. Why does solid water expand upon freezing?

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Question 4 4. The temperature at point A is 40°F. The temperature at point B is 70°F. If the distance between the two points is 2 ft, what is the value of the thermal gradient from point A to B?

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Question 5 5. The temperature at point A is 40°F. The temperature at point B is 70°F. What is the direction of the heat flow?

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Page 2

Question 6 6. Which of these are possible units for thermal gradient?

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Question 7 7. Absolute humidity is

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Question 8 8. If humidity is too _____, mold and infections may result. If humidity is too _____, respiratory issues may result.

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Question 9 9. Absolute humidity is expressed as grams of moisture per cubic meter of air (g/m3). The maximum absolute humidity of warm air at 30 degrees C is approximately _____ grams of water vapor. The maximum absolute humidity of cold air at 0 degrees C , is approximately _____ g of water vapor.

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Question 10 10. If the temperature inside my house is 70 degrees and the temperature outside my house is 45 degrees, what would be considered room temperature at my house?

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Page 3

Question 11 11. If I am a data center manager and I learn the temperature in the server room is 60 degrees, what should I do?

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Question 12 12. Room temperature can be defined as:

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Question 13 13. The water vapor content in dry air is

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Question 14 14. Absolute Humidity has the same units as

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Question 15 15. If you are given that a measurement of the amount of water vapor in a 2 cu.m container is 34.6 gms, what is the temperature in the container?

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Page 4

Question 16 16. How is thermal contraction measured?

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Question 17 17. How is thermal expansion measured?

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Question 18 18. Why do materials expand when heated?

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Question 19 19. Which of the following is true?

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Question 20 20. A time temperature transformation diagram is also know as _____.

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Page 5

Question 21 21. A region in a material that is uniform on the atomic scale is called _____.

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Question 22 22. What is equilibrium temperature?

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Question 23 23. What is specific heat?

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Question 24 24. When an object 'cools', what is happening to its thermal energy?

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Question 25 25. The amount of heat transferred from a hot system to its cold surrounding will be higher if

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Page 6

Question 26 26. To design a heat exchanger, you need to know the following:

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Question 27 27. The rate at which heat is removed from a system can be increased by increasing

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Question 28 28. Sensible cooling load is

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Question 29 29. Which of the following sensible cooling load factors are those which you can control?

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Question 30 30. The American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) recommends keeping humidity at _____ percent to _____ percent throughout the year, using dehumidifiers during warm weather months and humidifiers to keep relative humidity at a healthful level.

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Temperature & Heat in Engineering Chapter Exam Instructions

Choose your answers to the questions and click 'Next' to see the next set of questions. You can skip questions if you would like and come back to them later with the "Go To First Skipped Question" button. When you have completed the practice exam, a green submit button will appear. Click it to see your results. Good luck!

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