EGEE 102: Energy Conservation and Environmental Protection – Lesson 1-8 Quizzes_ Answered Updated 2026.

EGEE 102: Energy Conservation and Environmental Protection – Lesson 1-8 Quizzes_ Answered Updated 2026. Lesson 1 - Quiz Due Jan 25 at 11:59pm Points 50 Questions 10 Available Jan 13 at 12am - Jan 25 at 11:59pm Time Limit 20 Minutes Allowed Attempts 2 Instructions You have 20 minutes to complete the quiz. The quiz has 10 questions. Questions 1 through 8 are a mix of True/False and multiple choice. Questions 9 and 10 are numerical problems. 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. Feedback for this Quiz (along with your responses and the correct answers) will be made available after the deadline for this Quiz. Attempt History Attempt Time Score KEPT Attempt 1 10 minutes 48.67 out of 50 LATEST Attempt 2 17 minutes 46 out of 50 Attempt 1 10 minutes 48.67 out of 50 Score for this attempt: 46 out of 50 Submitted Jan 13 at 12:50pm This attempt took 17 minutes.  Question 1 4 / 4 pts Energy can be converted to which of the following? Work Heat Radiation Correct! All of the above None of the above Energy is the property of matter that can be converted to heat, work or radiation. So, “all of the above” is the correct choice.  Question 2 4 / 4 pts Energy from the Sun is coming to the earth in the form of Correct! Radiation Mechanical Chemical Nuclear  Question 3 4 / 4 pts The energy possessed by a ball thrown by a quarterback is of the form Correct! Mechanical Radiation Chemical Thermal  Question 4 4 / 4 pts Which consumes the least amount of energy per day? Correct! Eating your recommended amount of Calories Driving a car 18 miles Heating a house in the U.S. Powering a 100 W lightbulb for 24 hours  Question 5 4 / 4 pts The television converts electricity to which of the following energy forms (select all that apply) Correct! radiation energy Correct! mechanical energy Correct! thermal or heat energy chemical energy Television convert the electricity to visible light (radiation) and sound (mechanical). Also, the Television will generation heat during the working process because they are not perfectly efficient.  Question 6 0 / 4 pts Nuclear fusion is a renewable source of energy. Correct Answer True You Answered False Nuclear fusion uses hydrogen isotopes and hydrogen isotopes can come from water. There is plenty of water on this planet to provide energy for literally millions of years. This makes nuclear fusion a renewable source of energy.  Question 7 5 / 5 pts A BTU has more energy than a calorie. Correct! True False A BTU is the amount of heat required to heat 1 lb (454 grams) of water through 1°F. Whereas 1 calorie is the amount of heat required to raise 1 g of water through 1°C. Therefore there is more energy in one BTU.  Question 8 5 / 5 pts Among the energy units listed, which one represents the most amount of energy? Joule (J) Correct! Calorie (Food Calorie) British Thermal Unit (BTU) calorie 1 Cal = 3.969 BTU = 1,000 cal = 4,187 J  Question 9 8 / 8 pts An electric lightbulb rated for 34 Watts is used for 9 hours. How much energy is burned? Answer in KWhs, do not include units into the space. Correct! Correct Answer 0.31 margin of error +/- 5% Energy use can be calculated by multiplying power by time. Be sure to correct for unit changes.  Question 10 8 / 8 pts A 150 watt electric warming blanket is operated for 9.2 hours per day during the winter, and winter lasts 110 days per year. At 0.06 dollars per kWh, what is the cost of the energy consumed by the electric blanket (dollars) each year? Answer to two decimal places, do not include unit symbols. Correct! Correct Answer 9.11 margin of error +/- 1% The electric blanket cost depends on the price and the consumed energy, and the consumed energy is derived from the power rate and working hours. For example, kWh x hr / day x day / y x $/kWh = $ / y. Quiz Score: 46 out of 50 Lesson 2 - Quiz Due Jan 25 at 11:59pm Points 50 Questions 12 Available Jan 20 at 12am - Jan 25 at 11:59pm Time Limit 20 Minutes Allowed Attempts 2 Instructions You have 20 minutes to complete the quiz. The quiz has 12 questions. Questions 1 through 11 are a mix of True/False and multiple choice. Question 12 is a numerical problem. 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. Feedback for this Quiz (along with your responses and the correct answers) will be made available after the deadline for this Quiz. Attempt History Attempt Time Score KEPT Attempt 2 10 minutes 46 out of 50 LATEST Attempt 2 10 minutes 46 out of 50 Attempt 1 11 minutes 46 out of 50  Correct answers will be available on Jan 27 at 12am. Score for this attempt: 46 out of 50 Submitted Jan 20 at 3:25pm This attempt took 10 minutes.  IncorrectQuestion 1 0 / 4 pts The economic growth of an industrialized nation has a strong correlation with energy consumption True False Countries with large amounts of industrial development have a weaker link between energy consumption and economic growth.  This study source was downloaded by from CourseH on :10:53 GMT -06:00 Question 2 4 / 4 pts The U.S. has highest crude oil reserves in the world. True False The United States ranks as eleventh in the world for reserves of oil. Please refer to section 2.5 Current and Future Energy Sources of the USA.  Question 3 4 / 4 pts Which fuel supplies the greatest proportion of primary energy in the U.S.? Coal Petroleum Natural Gas Nuclear Petroleum accounts for almost 40% of the U.S.’s energy. Please refer to section 2.5: US Energy Consumption Over Time.  Question 4 4 / 4 pts Which energy source accounts for the greatest proportion of electricity generation in the US? Natural Gas Petroleum Coal Hydro In 2015, the share of electricity net generation provided by natural gas exceeded that of coal.  Question 5 4 / 4 pts Which of the below energy accounts for the greatest proportion of renewable energy in the U.S. in 2020? Wind energy Hydroelectric energy Solar energy Geothermal energy Wind energy was the second largest renewable energy source in the USA in 2020. The biggest rTehnisestwudyasboulerceewnasedrogwnyloiasdedbbioy 1m00a00s0s900e4n12e9r27gfyro.m CourseH on :10:53 GMT -06:00  Question 6 4 / 4 pts At the present rate of consumption, how long are the U.S. petroleum reserves expected to last? Less than 10 years 200 year 100 years around 50 years At the current rate of consumption, the current U. S. petroleum reserves will last approximately for 2.2 years. Please refer to section 2.7: Lifetime of current reserves at constant consumption.  Question 7 4 / 4 pts According to estimation, which energy source is growing fastest between 2020 and 2050 for the U.S? Petroleum and other liquids Natural gas Nuclear Other renewable energy Petroleum consumption increases by around 6 quadrillions BTU, natural gas increases by around 5 quadrillions BTU, Nuclear energy reduces by around 1 quadrillion BTU, and other renewable increases by around 10 quadrillions BTU.  Question 8 4 / 4 pts In the next 20 years, it is expected that renewable energy sources will supply more than half of the global energy requirements. True False In the next 20 years, it is expected that renewable energy sources will supply about 30% of global. energy requirements. Please refer to section Current and Future Energy Supply.  Question 9 4 / 4 pts Which of these energy sources is increasing its relative share of the global energy supply by the most since 2015? Thisrsetundey wsoaurbcelewsas downloaded by from CourseH on :10:53 GMT -06:00 nuclear coal oil  Question 10 4 / 4 pts At the present rate of consumption, reserves for which one of the following fuels will last the longest time? Petroleum Coal Natural Gas At the current rate of consumption, the approximate life time of the world’s petroleum, natural gas, and coal reserves is 42 years, 56 years, and 118 years, respectively. Refer: section 2.7 Lifetime of current reserves at constant consumption.  Question 11 4 / 4 pts Resources represent the portion of the energy that is known to exist or even suspected to exist, regardless of technical or economic viability. True False Resources represent that portion of the energy that is known to exist or even suspected to exist, regardless of technical or economic viability. Please refer to section 2.7: Energy Reserves.  Question 12 6 / 6 pts The coal consumption is observed to increase at the rate of 2% per year for a country. How long will it take to double the current usage of coal? (Please provide your answer to the nearest whole number) Super! Quiz Score: 46 out of 50 Lesson 3 - Quiz Due Feb 1 at 11:59pm Points 50 Questions 13 Available Jan 27 at 12am - Feb 1 at 11:59pm Time Limit 20 Minutes Allowed Attempts 2 Instructions You have 20 minutes to complete the quiz. The quiz has 13 questions. Questions 1 through 8 are a mix of True/False and multiple choice. Questions 9 through 13 are numerical problems. 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. Feedback for this Quiz (along with your responses and the correct answers) will be made available after the deadline for this Quiz. Attempt History Attempt Time Score LATEST Attempt 1 17 minutes 50 out of 50  Correct answers will be available on Feb 3 at 12am. Score for this attempt: 50 out of 50 Submitted Jan 30 at 11:30am This attempt took 17 minutes.  Question 1 2 / 2 pts Which one of the following is NOT true about energy conversion devices? Total Energy Input = Useful Energy Output Total Energy Input = Total Energy Output Total Energy Input = Useful Energy Output + Energy Dissipated to the surroundings Total Energy Input = Useful Energy Output / Efficiency Total energy = useful energy + waste energy. Refer to section 3.2: Energy Conversion Devices. Question 2 2 / 2 pts Which one of the following devices is least energy efficient if you consider its overall efficiency (i.e. efficiency costs of previous steps) ? Power plant Electric motor Light bulb The overall efficiency of end-use electrical appliances are quite low due to energy losses associated with generating electrical energy.  Question 3 2 / 2 pts What is the primary form of useful energy output in the case of a car? Mechanical Thermal or Heat Radiation Chemical A car converts chemical energy from the burning of fuel into mechanical energy (rotation of wheels). Refer to section 3.2: Energy Conversion Devices.  Question 4 2 / 2 pts What is the primary form of useful energy output in the case of a lawn mower? Mechanical Thermal or Heat Radiation Chemical A lawn mower converts chemical energy from the burning of fuel into mechanical energy (rotation of blades). Refer to section 3.2: Energy Conversion Devices.  Question 5 2 / 2 pts What is the form of useful energy output in the case of a computer screen? Radiation Mechanical Thermal or Heat Chemical A computer screen converts electrical energy into radiation (the pictures and text that we see on the computer screen). Refer to section 3.2: Energy Conversion Devices.  Question 6 2 / 2 pts Energy cannot be destroyed or created—it can only change its form. True False First law of Thermodynamics states that energy can neither be created nor be destroyed.  Question 7 4 / 4 pts In a fossil fuel power plant what type of energy in the fuel is converted to electrical energy? Chemical Mechanical Electrical Thermal In a power plant, fuel is burnt (chemical energy) to produce electricity with several intermediate steps. Refer to section 3.8: Example of Power Plant Operation.  Question 8 4 / 4 pts What is the most common by product of fossil fuel-based energy conversion processes? Light Heat Sound Motion Most energy conversion processes produce heat as a by product. Refer to section 3.2: Energy Conversion Devices.  Question 9 6 / 6 pts The useful output from a heat engine is 231 cal. The energy that is wasted is 5,916 J. What is the Carnot efficiency of the engine? (Answer with units of %. i.e. 30 not 0.3. you do not need to provide the %) Efficiency = ((useful energy output) / (useful energy output + waste energy output))*100. Note: Use units consistently. Please refer the section of the Efficiency of Energy Conversion Devices.  Question 10 6 / 6 pts The following step efficiencies apply to the use of gasoline in a car: Crude production: 93.7%, Refining 80.7%, Transportation 90.9%, Engine efficiency 28.7%. What is the total efficiency of the process? (Answer units: %, i.e. input 10 not 0.1. Be sure to exclude the % as Canvas does not accept symbols) Overall Efficiency of a system is the product of step efficiencies. Please refer to section 3.9: Calculating Overall Efficiency.  Question 11 6 / 6 pts The flame temperature in an automobile engine is 958 °C, and the exhaust is emitted at 61 °C. What is the Carnot efficiency of the engine? (Answer units: %) Use Carnot efficiency formula and temperatures in Kelvin. Please refer to section 3.7: The Carnot Efficiency.  Question 12 6 / 6 pts If the energy input of a system is 88 calories and its output is 51 calories, what is the efficiency of the system? (Answer units: %, i.e. 30 not 0.3, do not include the %) System Efficiency = (useful energy output) / (total energy input) * 100. Please refer to section: Efficiency of Energy Conversion Devices.  Question 13 6 / 6 pts The flame temperature in an automobile engine is 1,276 °F, and the exhaust is emitted at 339 °F. What is the Carnot efficiency of the engine? (Answer with units of %. i.e. 30 not 0.3. you do not need to provide the %) Use the Carnot efficiency formula and temperatures in Kelvin. Please refer to section covering The Carnot Efficiency. Quiz Score: 50 out of 50 Due Feb 22 at 11:59pm Points 50 Questions 13 Available Feb 10 at 12am - Feb 22 at 11:59pm Time Limit 20 Minutes Allowed Attempts 2 Instructions You have 20 minutes to complete the quiz. The quiz has 13 questions that are a mix of True/False and multiple choice. 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. Feedback for this Quiz (along with your responses and the correct answers) will be made available after the deadline for this Quiz. Attempt History Attempt Time Score LATEST Attempt 1 7 minutes 50 out of 50  Correct answers will be available on Feb 24 at 12am. Score for this attempt: 50 out of 50 Submitted Feb 11 at 6:49pm This attempt took 7 minutes.  Question 1 4 / 4 pts The energy that causes our atmosphere to heat up comes from . the sun volcanoes oceans inside the Earth Absorption of radiation from the lower end of the frequency spectrum of light emitted by the sun helps keep the planet warm. Please refer to Lesson 4b: Greenhouse effect.  Question 2 4 / 4 pts If the atmosphere did not contain greenhouse gases, the planet would be hotter. True False CO2 and other greenhouse gases absorb part of the infrared radiation escaping earth's surface in the night. They therefore help keep the planet warmer. Please refer to Lesson 4b: Greenhouse effect.  Question 3 4 / 4 pts Which one of the following will reduce vehicular NOx emissions? washing the car rolling down the windows instead of using the AC keeping the car well tuned pumping gas at night Please refer to Lesson 4c: Protecting the Environment. Item no. 11.  Question 4 4 / 4 pts Atmospheric concentrations of methane in the last 150 years have . stayed the same increased decreased The concentration of greenhouse gases in the atmosphere has been changing over the past 150 years. Since pre-industrial times atmospheric concentrations of the gases have increased:CO2 has climbed over 31 percent.CH4 has climbed over 151 percent. N2O has climbed 17 percent.Lesson 4b: Greenhouse Gases.  Question 5 4 / 4 pts Acid rain damages trees in which of the following manners? removes soil nutrients dissolves roots causes bark to fall off Acid rain does not usually kill trees directly. Instead, it is more likely to weaken trees by:1. Damaging their leaves.2. L g tQhueiznusturibemntistteadvailable to them.3. Exposing them to toxic substances slowly released from the soil.Lesson 4c: Effects of Acid Rain on Forests and Aquatic Life.  Question 6 4 / 4 pts Which one of the following is true about global temperatures in the last century? increased about 1 degrees C increased about 12 degrees C increased about 6 degrees C decreased about 1 degrees C The increase in the greenhouse gases between 1950 and 2010 is believed to have caused an increase in the global temperature.  Question 7 4 / 4 pts Which one of the following chemicals leads to the destruction of ozone? PHDs VOCs CFCs Ozone depletion is caused by chlorofluorocarbons (CFCs) and other ozone depleting substances. Please refer to Lesson 4c: The Ozone Cycle.  Question 8 4 / 4 pts Burning of a fossil fuel is a reaction of elements in the fuel with oxygen. True False The carbon the fuel combines with the oxygen in the air used for burning and forms carbon dioxide. In case there is not enough oxygen for complete oxidation, carbon monoxide (CO) may form. Hydrogen (H) in the fuel oxidizes by combining with oxygen (O) and forms water (H2O). Please refer to Lesson 4a: Products of Combustion.  Question 9 4 / 4 pts Minerals in fossil fuels turn into ash when oxidized (burnt). True False Please refer to Lesson 4a: Fossil Fuel Elements / Click to drop coal / Minerals.  Question 10 4 / 4 pts From the following, pick the odd set of pollutants (i.e. the unmatching combination of primary and secondary pollutants relative to the other choices): VOC, NOx, SO2 CO, NOx, SO2 CO, VOC, SO2 CO, VOC, Ozone The pollutants that are emitted directly from a combustion process are called "primary pollutants."  Question 11 4 / 4 pts If current trends persist, experts expect global temperatures to change by an addtional 1-5 degrees C by the year 2100. True False  Question 12 2 / 2 pts Earth is a natural greenhouse. True False The atmospheric gases in addition to oxygen and nitrogen contain gases such as carbon dioxide, water vapor, methane (CH4), and laughing gas (N2O). These gasses are called greenhouse gases and these gases have the ability to absorb the infrared radiation, which is going out into the space. This natural greenhouse effect--absorption of a part of outgoing infrared radiation--keeps the average temperature of the Earth (including summer, winter, night and day, and all latitudes) at 59 degrees F.  Question 13 4 / 4 pts Sun spots can increase the radiation from the Sun. True False Quiz submitted Sun spots (intense flares on the surface) can increase the radiation from the sun. Quiz Score: 50 out of 50 Lesson 5 - Quiz Due Mar 1 at 11:59pm Points 50 Questions 16 Available Feb 23 at 12am - Mar 1 at 11:59pm Time Limit 20 Minutes Allowed Attempts 2 Instructions You have 20 minutes to complete the quiz. The quiz has 16 questions. Questions 1 through 13 are a mix of True/False and multiple choice. Questions 14 through 16 are numerical problems. 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. Feedback for this Quiz (along with your responses and the correct answers) will be made available after the deadline for this Quiz. Attempt History Attempt Time Score KEPT Attempt 2 19 minutes 50 out of 50 LATEST Attempt 2 19 minutes 50 out of 50 Attempt 1 11 minutes 46 out of 50  Correct answers will be available on Mar 6 at 12:05am. Score for this attempt: 50 out of 50 Submitted Feb 24 at 8:44pm This attempt took 19 minutes.  Question 1 2 / 2 pts A conventional water heater consumes energy . whether we use hot water or not Only if we use hot water Only in winter Only in summer Water heater consumes energy whether we use hot water or not. This is due to the heat lost to the surroundings.  Question 2 2 / 2 pts How can you reduce your water heating bill (which accounts for about 14 percent of the average utility bill)? use less hot water turn down the thermostat on your water heater insulate your water heater buy a new, more efficient water heater all of the above Water heating bills can be reduced by turning down the thermostat on your water heater, replacing the old water heater with new more efficient water heater, use less hot water, insulate your water heater.  Question 3 2 / 2 pts What kind of a label do all electrical appliances have? Energy Guide Energy Star Energy Efficiency All appliances have an Energy Guide label.  Question 4 2 / 2 pts Which of the following actions is not likely to improve the efficiency of a refrigerator cleaning the coils in the back of the refrigerator checking the seals using the 'dollar bill test' switching the motor from a DC motor to a more efficient AC motor keeping the freezer to its capacity Switching the motor from a DC motor to a more efficient AC motor will not improve the efficiency of the refrigerator.  Question 5 2 / 2 pts ITnhsisustluadtyinsogurctehweas hdoowtnlwoadaetdebry 1p0i0p00e0s900w41il2l92s7afrvome CaoulrosetHeonrg01y-.:11:45 GMT -06:00 True False Insulating the hot water pipes will save a lot of energy, by reducing the heat lost to the surroundings.  Question 6 2 / 2 pts The energy guide label includes of the product. Select all that apply Production date Estimated yearly operating cost Estimated yearly electricity use Model and size The energy guide label includes five aspects of the product: key features; maker, model, and size; estimated yearly operating cost and cost range; estimated yearly electricity use. Some energy guide labels have the ENERGY STAR logo.  Question 7 2 / 2 pts What does the acronym DOE stand for? Department Of Energy Division Of Energy Development Of Energy Disasters Of Energy DOE stands for Department Of Energy.  Question 8 2 / 2 pts Frost build up reduces the efficiency of freezers. True False Frost build-up in the freezer can reduce their efficiency.  Question 9 2 / 2 pts Leaking faucets don't increase your energy costs. TRUE FALSE Leaking faucets can increase your energy costs in the form hot water being wasted.  Question 10 2 / 2 pts Placing your clothes dryer in a cold basement will make the dryer . Less efficient More efficient Work smoothly Placing your clothes dryer in a cold basement will make the dryer .  Question 11 2 / 2 pts Heat pumps provide extra savings compared to conventional water heaters. True False Heat pumps provide higher savings compared to conventional water heaters.  Question 12 2 / 2 pts What steps can lead to an energy efficient operation of a dishwasher? wash only full loads use the no-heat air dry feature don't pre-rinse dishes before putting them in the dishwasher all of the above none of the above For energy-efficient operation of a dishwasher wash only full loads, use the no-heat air dry feature, and don't pre-rinse dishes before putting them in the dishwasher.  Question 13 2 / 2 pts Which of the following appliances has the lowest typical energy costs? Dishwasher Microwave oven Washing machine Refrigerator Microwave operating costs less than 500 kWh/year, Dishwasher and washing machine operating costs 500-1000 kWh/year, and refrigerator operating costs more than 1000 kWh/year.  Question 14 8 / 8 pts Calculate the amount of heat energy required to heat 192 lbs of water from 67oF to 134oF. (Answer units: BTUs) Amount of heat energy required = Cp * (Th - Tc) = Energy needed (be sure to check units!)  Question 15 8 / 8 pts Assume there are two refrigerators in the market. One refrigerator is sold for 306 dollars, and the estimated operating cost is 74 dollars per year. Another refrigerator is sold for 447 dollars, and the estimated operating cost is 46 dollars per year. If we buy the more expensive refrigerator, what will be the payback period? Answer to two decimal places, do not include unit symbols. The payback period is the year that the difference cumulative operating cost of two refrigerators could cover the difference between the two refrigerators’ sale prices.  Question 16 8 / 8 pts A water heater heats 193 gal of water from 54oF to 111oF every day. What is the annual energy requirement of the water heater? Hint: 1 gal of water weighs 8.3 lbs (Answer units: BTUs) Annual energy requirement = Cp * (Th - Tc) * 8.3 * 365 = Energy in BTUs. Note: 1 gal of water weighs 8.3 lbs. Quiz Score: 50 out of 50 Lesson 6 - Quiz Due Mar 8 at 11:59pm Points 50 Questions 11 Available Mar 3 at 12am - Mar 8 at 11:59pm Time Limit 20 Minutes Allowed Attempts 2 Instructions You have 20 minutes to complete the quiz. The quiz has 11 questions. Questions 1 through 9 are a mix of True/False and multiple choice. Questions 10 and 11 are numerical problems. 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. Feedback for this Quiz (along with your responses and the correct answers) will be made available after the deadline for this Quiz. Attempt History Attempt Time Score KEPT Attempt 2 20 minutes 40 out of 50 LATEST Attempt 2 20 minutes 40 out of 50 Attempt 1 13 minutes 36 out of 50  Correct answers will be available on Mar 10 at 12am. Score for this attempt: 40 out of 50 Submitted Mar 4 at 11:41am This attempt took 20 minutes.  Question 1 4 / 4 pts A foot-candle (fc) is defined as . a lumen of light distributed over 1 square meter area a lumen of light distributed over 1 square foot area a joule of energy distributed over 1 square foot area ThisastuWdyastotuorcre wpaoswdoewrndloiasdterdibbyu1te00d00o0v90e0r sfrqomuaCroeursfeeHroena:11:59 GMT -06:00  Question 2 4 / 4 pts Light bulb labels should contain what kind of information? light output energy used life of the bulb all of the above none of the above  Question 3 4 / 4 pts What are the units of measuring light? Amperes Henrys Watts Lumens  Question 4 4 / 4 pts CFL bulbs operate at temperatures compared to halogen bulb. Much lower Much higher similar  Question 5 4 / 4 pts A spotlight is typically of what type? standard incandescent tungsten halogen Type-R  Question 6 4 / 4 pts Which of the following lighting methods is the most energy efficient? incandescent fluorescent LED  Question 7 4 / 4 pts Compact fluorescent light usually has a compared to incandescent bulb producing the same amount of lumens. Longer life Shorter life Higher power consumption Lower efficiency  Question 8 4 / 4 pts Which one of these methods of lighting is least efficient? incandescent fluorescent high-intensity discharge LED  Question 9 4 / 4 pts Compared to ordinary incandescent bulbs, tungsten halogen bulbs consume power to produce same amount of light. (1 point) Lesser More Same amount of  Question 10 4 / 4 pts A 106-watt light bulb is left on for 36 hours. How much did it cost to operate the light bulb if electricity costs 0.06 dollars per kWh? (Answer to 2 d.p. units: $)  IncorrectQuestion 11 0 / 10 pts To save energy and money, Jackie Smith replaced the 112 Watt incandescent light bulb in her house with a 28 Watt CFL bulb. The expected life of incandescent and CFL bulbs is 1,000 and 10,000 hours respectively. The purchase price of an incandescent bulb is $0.57 and for the CFL it is $5.79. The cost of electricity is 0.04 $ per kWh. What is her total savings over the lifetime of the CFL? (Answer to 2 d.p. units: $) Quiz Score: 40 out of 50 Lesson 7 - Quiz Due Mar 29 at 11:59pm Points 50 Questions 15 Available Mar 17 at 12am - Mar 29 at 11:59pm Time Limit 20 Minutes Allowed Attempts 2 Instructions You have 20 minutes to complete the quiz. The quiz has 15 questions. Questions 1 through 10 are a mix of True/False and multiple choice. Questions 11 through 15 are numerical problems. 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. Feedback for this Quiz (along with your responses and the correct answers) will be made available after the deadline for this Quiz. Attempt History Attempt Time Score LATEST Attempt 1 20 minutes 34 out of 50  Correct answers will be available on Mar 31 at 12am. Score for this attempt: 34 out of 50 Submitted Mar 17 at 9:15pm This attempt took 20 minutes.  Question 1 2 / 2 pts Home heating is the single highest energy expense for a household. True False  Question 2 2 / 2 pts Because of which two processes do you feel the heat when you are standing next to a wood stove? Conduction Convection Radiation Radiation and conduction Radiation and convection  Question 3 2 / 2 pts You are warmed by the sun. This is an example of heat transfer by . Conduction Convection Radiation None of the above  Question 4 2 / 2 pts A thermos bottle has a shiny interior. What type of heat transfer does this prevent? Conduction Convection Radiation Radiation is transfer of heat through electromagnetic radiation.  Question 5 2 / 2 pts A higher HDD indicates a . Higher heat loss Higher fuel requirements Higher temperature difference between inside and outside All the above None of the above The higher HDD indicates a higher heat loss and therefore, higher fuel requirements.  Question 6 2 / 2 pts HDD is used to estimate the amount of energy required for residential space heating during a cool season. True False HDD is used to estimate the amount of energy required for residential space heating during a cool season,  Question 7 2 / 2 pts After a house is built, the easiest place to insulate a house is/are . Walls Roof Basement walls Attic  Question 8 2 / 2 pts Of the following sources, where does the most heat loss occur for a typical home? Windows Doors Basement Roof Cracks in walls, windows and doors  Question 9 2 / 2 pts The higher the R-value, the greater the insulating effectiveness. True False  Question 10 2 / 2 pts What is the average cost of electricity in the US? $8.0/kWh $0.06/MWh $80/MWh $60/kWh  Question 11 4 / 4 pts Natural gas is sold in the US at $12.49 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.)  Question 12 4 / 4 pts In State College, PA the average outside temperature for a given day was 35 degrees F. Calculate the HDD for that day.  Question 13 6 / 6 pts A wall is made up of the following materials: Plasterboard (R=0.41), 4 inches of fiberglass (R=2.56/inch), Plywood (R=1), and Wood Siding (R=0.82). This wall is 11 feet long and 8 feet high. On a particular day the average outside temperature is 34 degrees F. What is the R-value that you would use to calculate the heat loss? (Answer to 2 d.p.) Recall that Heat loss = (Temp Diff * Area)/R-value (Units: BTU/h)  IncorrectQuestion 14 0 / 6 pts A house in State College, PA has a 1,748 ft2 of wall (R=24), calculate the heating requirement for the house for the heating season, given that the HDD for State College is 5,729. (Answer to 2 decimal places, unit: MMBTUs). Lesson 7b has the calculating heat loss section, and this question is related to seasonal heat loss.  IncorrectQuestion 15 0 / 10 pts Jon has 1,057 ft2 of roof in his home in Pittsburgh, PA (HDD = 6,000). He is considering upgrading the insulation from R-16 to R-22. The estimate from the contractor was $477. His home is heated with natural gas. Last year, the average price he paid for natural gas was $7/MCF. Assuming an AFUE of 77%, how long will it take Jon to recover his investment? (Answer to the nearest whole number, units: years) Quiz Score: 34 out of 50 Due Apr 5 at 11:59pm Points 50 Questions 12 Available Mar 31 at 12am - Apr 5 at 11:59pm Time Limit 20 Minutes Allowed Attempts 2 Instructions You have 20 minutes to complete the quiz. The quiz has 12 questions. Questions 1 through 11 are a mix of True/False and multiple choice. Question 12 is a numerical problem. 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. Feedback for this Quiz (along with your responses and the correct answers) will be made available after the deadline for this Quiz. Attempt History Attempt Time Score LATEST Attempt 1 19 minutes 50 out of 50  Answers will be shown after your last attempt Score for this attempt: 50 out of 50 Submitted Mar 31 at 9:17am This attempt took 19 minutes.  Question 1 4 / 4 pts What is the most commonly used fuel used for residential heating? Oil Gas Electric Coal Natural Gas, 55% of households use natural gas Question 2 4 / 4 pts Quiz submitted Due to convection, a house with an electric radiant system and floors with a high thermal mass, can reduce heating costs if the electric company offers “time-of-use” rates. True False False, an electric radiant system heats through radiation, not convection.  Question 3 4 / 4 pts AFUE stands for . Annual Fuel Utilization Efficiency annual fuel utilization efficiency  Question 4 4 / 4 pts When presented with limited space, a hydronic heating system can be installed vertically. True False A GHP can be installed vertically if there is limited space. A hydronic heating system must be installed horizontally underneath the floor to be effective.  Question 5 4 / 4 pts Opening the drapes of windows on which side of the house will help reduce heating costs? north south east west  Question 6 4 / 4 pts When looking at a graph of BTUs/h and outdoor temperature, the amount of supplemental heat (in BTUs) can be determined by . subtracting home heating requirement BTU point for a specific temperature by the heat pump output BTU point for the same temperature, to the left of the balance point subtracting home h g rQequuiizresmuebnmt BittTeUdpoint for a specific temperature by the heat pump output BTU point for the same temperature, to the right of the balance point multiplying the given temperature by the home heating requirement in BTUs. Adding the balance point BTUs to the minimum heat pump output BTUs. subtracting…to the left of the balance point, because we want to find the BTU difference between heat pump output and home heating requirements, where the requirements are greater than the output.  Question 7 4 / 4 pts High temperature, high pressure refrigerant comes out of the compressor and . condenses, absorbing heat from the inside evaporates, giving off heat to the inside condenses, giving off heat to the inside evaporates, absorbing heat from the inside  Question 8 4 / 4 pts What is the typical range for the COP for heat pumps? 90-100 200+ 300+ 1.5-3.5  Question 9 4 / 4 pts In home heating, if the outside temperature increases, holding the inside temperature constant, the Coefficient of Performance of a heat pump decreases. True False False, the COP will increase if the outside temperature increases (see formula).  Question 10 4 / 4 pts The collector’s efficiency increases as . useful energy delivered increases (insolation remains constant) the sun sets insolation incr useful energy delivered remains constant) Quiz submitted the sun rises useful energy delivered increases…Based on the equation: Collector’s Efficiency = Useful energy deliverd/insolation on collector*100, and there fore if the useful energy delivered increases, the collector’s efficiency will increase.  Question 11 4 / 4 pts Which of the following items is used in a passive solar heating system? Flat Plate Collectors Photovoltaic Cells Deciduous Trees A Geothermal Heat Pump  Question 12 6 / 6 pts A freezer maintains a temperature of 4ºC while the outside temperature is 28ºC. What is the COP of the freezer cooling system? Solution: T(hot)/T(hot)-T(cold) (Remember to convert from oC to K) Quiz Score: 50 out of 50