Q7-LR-2

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Pennsylvania State University *

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102

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Mechanical Engineering

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Jan 9, 2024

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3/19/23, 8:53 PM Lesson 7 - Quiz: EGEE 102 (SP23): Energy Conservation for Environmental Protection https://psu.instructure.com/courses/2224925/quizzes/4674328 1/8 Lesson 7 - Quiz Due Mar 25 at 11:59pm Points 25 Questions 15 Available Mar 13 at 12am - Mar 25 at 11:59pm Time Limit 20 Minutes Allowed Attempts 2 Instructions Attempt History Attempt Time Score KEPT Attempt 2 19 minutes 25 out of 25 LATEST Attempt 2 19 minutes 25 out of 25 Attempt 1 19 minutes 20 out of 25 Correct answers will be available on Mar 27 at 12am. Score for this attempt: 25 out of 25 Submitted Mar 19 at 8:52pm This attempt took 19 minutes. Remember that once you start the quiz, you cannot stop the timer. If you leave the quiz, the timer keeps running. You must finish in 20 minutes. This quiz 12 questions including 3 numerical problems. Feedback for this Quiz (along with your responses and the correct answers) will be made available after the deadline for this Quiz. 1 / 1 pts Question 1 Which of the following indicates the heating requirement at a particular location? (1 point) Higher Heating Value
3/19/23, 8:53 PM Lesson 7 - Quiz: EGEE 102 (SP23): Energy Conservation for Environmental Protection https://psu.instructure.com/courses/2224925/quizzes/4674328 2/8 Coefficient of Performance Heating Degree Days AFUE 1 / 1 pts Question 2 Warm water rises in a lake and cold water descends. What is the name given to this process? (1 point) Conduction Convection Radiation Convection is a process by which energy is transferred by the bulk motion of the fluids (gases or liquids). 1 / 1 pts Question 3 Because of which two processes do you feel the heat when you are standing next to a wood stove? (1 point) Conduction Convection
3/19/23, 8:53 PM Lesson 7 - Quiz: EGEE 102 (SP23): Energy Conservation for Environmental Protection https://psu.instructure.com/courses/2224925/quizzes/4674328 3/8 Radiation Radiation and conduction Radiation and convection 1 / 1 pts Question 4 What is the process in which heat is transferred through electromagnetic radiation? (1 point) Conduction Convection Radiation Radiation is transfer of heat through electromagnetic radiation. 1 / 1 pts Question 5 The number of degrees the mean temperature falls below 65 degrees F for a given day is indicated by _____ . (1 point) HDD CDD Heat index
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3/19/23, 8:53 PM Lesson 7 - Quiz: EGEE 102 (SP23): Energy Conservation for Environmental Protection https://psu.instructure.com/courses/2224925/quizzes/4674328 4/8 AFUE The HDD indicates how many degrees the mean temperature fell below 65ºF for the day. 1 / 1 pts Question 6 Which of the following temperature is usually considered as the base temperature for heating degree days calculation? (1 point) 50 55 60 65 1 / 1 pts Question 7 Most of the synthetic insulation products are poor insulation materials (1 point) True False
3/19/23, 8:53 PM Lesson 7 - Quiz: EGEE 102 (SP23): Energy Conservation for Environmental Protection https://psu.instructure.com/courses/2224925/quizzes/4674328 5/8 most of the synthetic insulation products such as polystyrene or polyurethane are very effective insulation materials 1 / 1 pts Question 8 Most of the synthetic insulation products are very effective insulation materials. (1 point) True False Most of the synthetic insulation products such as polystyrene or polyurethane are very effective insulation materials 1 / 1 pts Question 9 Natural materials like stone and bricks are not good insulation materials. (1 point) True False
3/19/23, 8:53 PM Lesson 7 - Quiz: EGEE 102 (SP23): Energy Conservation for Environmental Protection https://psu.instructure.com/courses/2224925/quizzes/4674328 6/8 Natural materials like stone and bricks are not good insulation materials. 1 / 1 pts Question 10 The time it takes to recover the additional cost through savings is called _____. (1 point) Pay Back Period Return of investment Overhead return 2 / 2 pts Question 11 Natural gas is sold in the US at $12.14 per MCF. What is the cost of heating per MMBTU? Recall that 1 MCF = 1,000 Cu. Ft and has 1,000,000 BTU; 1 CCF = 100 Cu. Ft and has 100,000 BTU. (Answer to 2 d.p.) (2 points) 12.14 2 / 2 pts Question 12
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3/19/23, 8:53 PM Lesson 7 - Quiz: EGEE 102 (SP23): Energy Conservation for Environmental Protection https://psu.instructure.com/courses/2224925/quizzes/4674328 7/8 Oil is sold in a particular region at $1.12/gal. Its heating value is 134,478 BTU/gal. What is the heating cost per MMBTU? (Answer to 2 d.p.) (2 points) 8.33 MMBTU / gal = (BTU/gal) / (1,000,000 BTU / MMBTU) $ / MMBTU = ($ / gal) / (MMBTU/gal) 3 / 3 pts Question 13 Natural gas is sold in the US at $0.78 per CCF. The efficiency of the natural gas furnace is 73.2%. What is the actual cost of heating per MMBTU? Recall that 1 MCF = 1,000 Cu. Ft and has 1,000,000 BTU; 1 CCF = 100 Cu. Ft and has 100,000 BTU. (Answer to 2 d.p.) (3 points) 10.66 Solution: Actual energy cost = 3 / 3 pts Question 14
3/19/23, 8:53 PM Lesson 7 - Quiz: EGEE 102 (SP23): Energy Conservation for Environmental Protection https://psu.instructure.com/courses/2224925/quizzes/4674328 8/8 A house in State College, PA has a 1,513 ft of wall (R=21), calculate the heating requirement for the house for the heating season, given that the HDD for State College is 5,056. (Answer to 2 decimal places, unit: MMBTUs). (3 points) 2 8.74 Lesson 7b has the calculating heat loss section, and this question is related to seasonal heat loss. 5 / 5 pts Question 15 A house in State College (HDD=6,842), PA has 1,270 ft of windows with R value = 2.5, 520 ft of walls with R value = 18, and 1,172 ft of roof with an R-value = 28. What is the total heat loss from the house for the season? (Answer to the nearest whole number, units: BTUs) (5 points) 2 2 2 95,034,728 Quiz Score: 25 out of 25