EGEE Exam 3 - EGEE Exam 3 2. What is the physical meaning...

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EGEE Exam 3 2. What is the physical meaning of coefficient of performance? (2 Points) A. It is the amount of work needed to produce one unit of heat B. It is the amount of work required to move one unit of heat between the reservoirs C. It is the amount of heat needed to produce one unit of work D. It is the amount of heat moved between the reservoirs for every unit of work done Refer to screen 8 in 'Lesson 8b - Cooling and Heating' Points Earned: 2/2 Correct Answer: D Your Response: D 3. If a heat pump is used to heat a house in the winter, how will the Coefficient of Performance be affected if the inside set temperature is changed from 70 o F to 65 o F? (2 Points) A. it decreases B. it stays the same C. it increases D. it may become negative Refer to screen 8 in 'Lesson 8b - Cooling and Heating' Points Earned: 2/2 Correct Answer: C Your Response: C 4. Ground Source heat pumps are more efficient than air to air heat pumps. (2 Points)
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Points Earned: 2/2 Correct Answer: True Your Response: True 5. Opening the drapes of windows on which side of a house helps in heating? (2 Points) A. south B. east C. north D. west Refer to screen 30 in 'Lesson 8b - Cooling and Heating' Points Earned: 2/2 Correct Answer: A Your Response: A 6. Which one of the following items is used in a passive solar heating system? (2 Points) A. Photo-voltaic Cells B. South facing windows C. A Geothermal Heat Pump D. Flat Plate Collectors Refer to screen 30 in 'Lesson 8b - Cooling and Heating' Points Earned: 2/2 Correct Answer: B Your Response: B
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7. Flat plate collectors are usually placed on the roof or on the ground where there is sunlight. Such collectors are classified as _______. (2 Points) A. Passive Systems B. Hybrid Systems C. Active Systems Refer to screen 26 in 'Lesson 8b - Cooling and Heating' Points Earned: 2/2 Correct Answer: C Your Response: C 8. Solar and GHP heating systems have absolutely no impact on the environment. (2 Points) Both solar and GHP heating systems both require the use of pumps that use electricity. Although the amount is small, it uses electricity, and with generation of electricity, there are emissions. Refer to screen 21 in 'Lesson 8b - Cooling and Heating' Points Earned: 2/2 Correct Answer: False Your Response: False 9. What happens when the outside temperature falls below the 'Balance Point'? (2 Points) A. the home heating requirement equals the heat pump output B. the home heating requirement falls below the heat pump output C. the heat pump output falls below the home heating requirement Points Earned: 2/2 Correct Answer:
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C Your Response: C 10. Which of the following defines 'Balance Point'? (2 Points) A. the home heating requirement equals the heat pump output B. the home heating requirement falls below the heat pump output C. the heat pump output falls below the home heating requirement Refer to screen 7 in 'Lesson 8b - Cooling and Heating' Points Earned: 2/2 Correct Answer: A Your Response: A 11. In heating mode, when the refrigerant liquid moves past the expansion valve it ______.
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This note was uploaded on 09/01/2010 for the course EGEE 102 taught by Professor Pisupati,sarmave during the Spring '07 term at Pennsylvania State University, University Park.

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EGEE Exam 3 - EGEE Exam 3 2. What is the physical meaning...

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