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EGEE 102 FINAL EXAM LATEST VERSION (200 QUESTIONS & CORRECT ANSWERS) A+ GRADE, Exams of Nursing

EGEE 102 FINAL EXAM LATEST VERSION (200 QUESTIONS & CORRECT ANSWERS) A+ GRADE

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2024/2025

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EGEE 102 FINAL EXAM LATEST VERSION (200
QUESTIONS & CORRECT ANSWERS) A+ GRADE
Nuclear fusion is a renewable source of energy. T/F
- CORRECT ANSWER >>>TRUE
Energy can be converted to which of the following?
Heat
Radiation
Work
All of the Above - CORRECT ANSWER >>>all of the above
The energy possessed by a ball thrown by a quarterback is of the form:
Mechanical
Radiation
Chemical
Thermal - CORRECT ANSWER >>>Mechanical
Which consumes the least amount of energy per day?
Eating your recommended amount of Calories
Driving a car 18 miles
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EGEE 102 FINAL EXAM LATEST VERSION (

QUESTIONS & CORRECT ANSWERS) A+ GRADE

Nuclear fusion is a renewable source of energy. T/F

- CORRECT ANSWER >>> TRUE Energy can be converted to which of the following? Heat Radiation Work All of the Above - CORRECT ANSWER >>> all of the above The energy possessed by a ball thrown by a quarterback is of the form: Mechanical Radiation Chemical Thermal - CORRECT ANSWER >>> Mechanical Which consumes the least amount of energy per day? Eating your recommended amount of Calories Driving a car 18 miles

Heating a house in the US Powering a 100 W lightbulb for 24 hours - CORRECT ANSWER >>> Eating your recommended amount of Calories Energy from the Sun is coming to the earth in the form of Radiation Mechanical Chemical Nuclear - CORRECT ANSWER >>> Radiation Energy can be converted from one form to another. T/F

- CORRECT ANSWER >>> TRUE Which one of the following is a unit of power? Joule Btu/h Watt/hour Quad - CORRECT ANSWER >>> Btu/h One BTU of energy is enough to do what? Heat your room to a comfortable temp Heat one pound of water by one degree F Heat one gram of water by one degree C

oil natural gas - CORRECT ANSWER >>> Wind The U.S. has highest crude oil reserves in the world. T/F

- CORRECT ANSWER >>> FALSE Which energy source accounts for the greatest proportion of electricity generation in the US? Natural gas Petroleum Coal Hydro - CORRECT ANSWER >>> Natural Gas Which fuel supplies the greatest proportion of primary energy in the U.S.? Coal Petroleum Natural Gas Nuclear - CORRECT ANSWER >>> Petroleum What percentage of the U.S. energy demand is met by renewable energy sources? around 25% around 10% around 50% greater than 75% -

CORRECT ANSWER

>>> around 10% To produce one dollar worth of goods and services, the U.S. uses less energy than any other country in the world. T/F - CORRECT ANSWER >>> FALSE At the present rate of consumption, how long are the U.S. petroleum reserves expected to last? less than 10 years 200 years 100 years around 50 years **- CORRECT ANSWER

** less than 10 years Resources represent the portion of the energy that is known to exist or even suspected to exist, regardless of technical or economic viability. T/F - CORRECT ANSWER >>> TRUE In the next 20 years, it is expected that renewable energy sources will supply more than half of the global energy requirements. T/F - CORRECT ANSWER >>> FALSE Which of these energy sources is increasing its relative share of the global energy supply by the most since 2015? renewables nuclear coal

90% - CORRECT ANSWER >>> less than 10% What is the form of useful energy output in the case of a computer screen? radiation mechanical thermal or heat chemical

- CORRECT ANSWER >>> Radiation What is the primary form of useful energy output in the case of a lawn mower? mechanical thermal or heat radiation chemical - CORRECT ANSWER >>> Mechanical What is the primary form of useful energy output in the case of a car? mechanical thermal or heat radiation chemical - CORRECT ANSWER >>> Mechanical Energy output must be equal to the input. T/F - CORRECT ANSWER >>> TRUE A heat engine converts thermal energy into what type of energy?

mechanical thermal chemical electrical - CORRECT ANSWER >>> Mechanical Which one of the following devices is least energy efficient? power plant electric motor light bulb - CORRECT ANSWER >>> Light bulb The following step efficiencies apply to the use of gasoline in a car: Crude production: 95.5%, Refining 82.5%, Transportation 95%, Engine efficiency 28.1%. What is the total efficiency of the process? (Answer units: %) - CORRECT ANSWER >>> refer to notes (it's hard to type out) The flame temperature in an automobile engine is 1,323 °F, and the exhaust is emitted at 276 °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 %) - CORRECT ANSWER >>> Thot = 717 + 273 = 990 K Tcold = 135 + 273 = 408 K (1-(408/990)) x 100 = 58.8% (not sure how i got the first part, when in doubt look up Fahrenheit to Kelvin conversion) The flame temperature in an automobile engine is 960 °C, and the exhaust is emitted at 60 °C. What is the Carnot efficiency of the engine? (Answer units: %) - CORRECT ANSWER >>> Thot = 960 + 273 = 1233 K Tcold = 60 + 273 = 333 K (1-(333/1233)) x 100 = 73%

A Calorie is a unit of energy. T/F - CORRECT ANSWER >>> TRUE Therm is a unit that is generally used to measure the energy contained in natural gas. T/F - CORRECT ANSWER >>> TRUE The fastest growth in the energy use is projected for some of the Asian nations. T/F - CORRECT ANSWER >>> TRUE The United States has about 1/4 of the world's coal deposits. T/F

- CORRECT ANSWER >>> TRUE In the next 20 years, it is expected that renewable energy sources will supply more than half of the U.S. energy requirements. T/F - CORRECT ANSWER >>> FALSE The United States has less than 5 percent of the world's oil and natural gas. T/F - CORRECT ANSWER >>> TRUE Most of the energy demand in the US is met by renewable energy sources. T/F - CORRECT ANSWER >>> FALSE The overall efficiency of a powerplant is less than the efficiency of an automobile engine. T/F - CORRECT ANSWER >>> FALSE

Two containers of oil are of different sizes but they have the same temperature, therefore they have the same energy content. T/F - CORRECT ANSWER >>> FALSE The temperature of a substance is not a measure of its heat content, but a measure of the average kinetic energy of this molecules T/F - CORRECT ANSWER >>> TRUE Geothermal heat can be used to produce electricity. T/F

- CORRECT ANSWER >>> TRUE The total energy input into a lightbulb can be converted into useful light energy. T/F - CORRECT ANSWER >>> FALSE From a car, useful energy output is __________. mechanical thermal or heat chemical radiation - CORRECT ANSWER >>> Mechanical Which of the following is a form mechanical energy? potential energy thermal energy nuclear energy electrical energy - CORRECT ANSWER >>> Potential energy

Use of which of the following energy sources will increase worldwide from 2020 to 2040? renewables oil natural gas all of those listed none of those listed - CORRECT ANSWER >>> all of those listed Which one of the following is a list of devices from the most efficient to least efficient? - CORRECT ANSWER >>> power plant (thermal), automobile engine, light bulb (fluorescent), light bulb (incandescent) (Incandescent Light-Bulb (5%), Fluorescent Light-Bulb (20%), Electric Motor (90%), Power Plant (35%), Automobile Engine (25%), Home oil Furnace (80%)) Coal reserves for the World at the present rate of consumption will last for about ________. - CORRECT ANSWER >>> ~150 years Carnot efficiency is lowered if we _____. - CORRECT ANSWER >>> increase T cold Which of the following energy conversion devices has the highest energy efficiency? - CORRECT ANSWER >>> generator (Generator has an efficiency of 97%, Steam turbine has an efficiency of 40%, Automobile engine has an efficiency of 25% and Incandescent light bulb has an efficiency of 5%.) In a power plant, chemical energy is finally converted into_______energy. - CORRECT ANSWER >>> electrical

The overall efficiency of an energy conversion device is determined by ______ the efficiency of all steps together. - CORRECT ANSWER >>> multiplying Which one of the following is a list of devices from least efficient to most efficient? - CORRECT ANSWER >>> automobile engine, power plant, electric motor What is a reasonable combustion temperature (Thot) in an automotive engine? - CORRECT ANSWER >>> 700 C A room air conditioner used by Joel is rated at 413 watts. Joel used the air conditioner for 10 hours every week during summer. Calculate the total energy consumed by the air conditioner (in kWh) during the summer semester which runs for 8 weeks? - CORRECT ANSWER >>> 413 W/1000 x 10 x 8 = 33. Jane uses a water heater that is rated at 2,129 watts for 4 hours everyday. The cost of electricity in her region is 11.3 cents per kWh. Calculate the annual operating cost for the water heater in $. - CORRECT ANSWER >>> 2,129/1000 x 4 x 365 = 3,108. 3,108.34 x 0.113 = 351. An old refrigerator which is rated at 420 Watts and runs for 12 hours everyday is replaced by a new energy efficient refrigerator which is rated at 222 Watts and is expected to run 8 hours everyday. If electricity costs 11.9 cents (not $!) per kWh, what are the monetary savings ($) in the month of December? - CORRECT ANSWER >>> 420 W/1000 x 12 x 31 = 156.24 x 0.119 =

222 W/1000 x 8 x 31 = 55.056 x 0.119 = 6. 18.59256 - 6.551664 = $12.

How many tons of carbon (as carbon dioxide) are released into the air each year? - CORRECT ANSWER >>> ~20 billion tons Formation of ozone at the ground level involves VOCs and NOx in the presence of sunlight. T/F

- CORRECT ANSWER >>> TRUE Which one of the following will reduce vehicular NOx emissions? **- CORRECT ANSWER

** keeping the car well tuned When carbon in a fossil fuel burns, it combines with oxygen to form _____. - CORRECT ANSWER >>> CO Nitrous oxide (N2O) is a component of NOx. T/F - CORRECT ANSWER >>> FALSE From the following, pick the odd set of pollutants (i.e. the unmatching combination of primary and secondary pollutants relative to the other choices): - CORRECT ANSWER >>> CO, VOC, Ozone Excessive greenhouse gases in the atmosphere due to anthropogenic emissions retains more heat than normal. T/F - CORRECT ANSWER >>> TRUE Without the greenhouse effect Earth would be a better place to live for humans. T/F - CORRECT ANSWER >>> FALSE

The increase in the greenhouse gases since industrialization began is believed to be causing an increase in the global temperature over the past 150 years. T/F - CORRECT ANSWER >>> TRUE Refrigerators are heat _________. - CORRECT ANSWER >>> movers Bottom mounted refrigerators are _____ efficient compared to top mounted refrigerators. - CORRECT ANSWER >>> more Placing your clothes dryer in a cold basement will make the dryer _____ **- CORRECT ANSWER

** less efficient What kind of a label do all electrical appliances have? - CORRECT ANSWER >>> Energy Guide ** TRUE Which one of the following will reduce vehicular NOx emissions? - CORRECT ANSWER >>> keeping the car well tuned When carbon in a fossil fuel burns, it combines with oxygen to form _____. - CORRECT ANSWER >>> CO Nitrous oxide (N2O) is a component of NOx. T/F - CORRECT ANSWER >>> FALSE From the following, pick the odd set of pollutants (i.e. the unmatching combination of primary and secondary pollutants relative to the other choices): - CORRECT ANSWER >>> CO, VOC, Ozone Excessive greenhouse gases in the atmosphere due to anthropogenic emissions retains more heat than normal. T/F - CORRECT ANSWER >>> TRUE Without the greenhouse effect Earth would be a better place to live for humans. T/F - CORRECT ANSWER >>> FALSE The increase in the greenhouse gases since industrialization began is believed to be causing an increase in the global temperature over the past 150 years. T/F - CORRECT ANSWER >>> TRUE Refrigerators are heat _________. - CORRECT ANSWER >>> movers Bottom mounted refrigerators are _____ efficient compared to top mounted refrigerators. - CORRECT ANSWER >>> more Placing your clothes dryer in a cold basement will make the dryer _____ - CORRECT ANSWER >>> less efficient What kind of a label do all electrical appliances have? - CORRECT ANSWER >>> Energy Guide The Energy Guide labels must specify the _____ of the particular model. **- CORRECT ANSWER ** estimated annual energy consumption Thermosiphon systems are most efficient in areas with ____ levels of solar radiation. **-

CORRECT ANSWER >>>** high What does the acronym DOE stand for? - CORRECT ANSWER >>> Department of Energy 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 - CORRECT ANSWER >>> all of the above

A conventional water heater consumes energy _____. - CORRECT ANSWER >>> whether we use hot water or not What is the term used to define the energy efficiency of a dishwasher? **- CORRECT ANSWER

** EF (energy factor) Which of the following appliances has the lowest typical energy costs? dishwasher microwave oven washing machine refrigerator - CORRECT ANSWER >>> microwave oven 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 - CORRECT ANSWER >>> estimated yearly operating cost estimated yearly electricity use model and size To qualify for the ENERGY STAR label, compact refrigerators and freezers must exceed the standard by 10%. - CORRECT ANSWER >>> FALSE In a typical residential or commercial lighting installation, what percentage of the electrical energy is consumed to support lighting? - CORRECT ANSWER >>> 0 to 20%

Compared to ordinary incandescent bulbs, tungsten halogen bulbs consume _____ power to produce same amount of light - CORRECT ANSWER >>> lesser Compact fluorescent light operated at cold temperatures (under around 50-60 degrees F) may result in reduced light output. T/F - CORRECT ANSWER >>> TRUE Day lighting typically has a CRI value of 100. T/F - CORRECT ANSWER >>> TRUE Approximately what percentage of electricity does an incandescent light bulb convert into visible light? - CORRECT ANSWER >>> 5% Higher Wattage bulbs are less efficient than lower Wattage bulbs T/F - CORRECT ANSWER >>> FALSE Use of which one of these devices for lighting leads to reduction in electricity consumption? - CORRECT ANSWER >>> dimmers A 85 watt incandescent light bulb is operated for 146 hours, and a 18 watt fluorescent light bulb is operated for the same period of time. At 0.07 $ per kWh, what is the cost savings of the fluorescent bulb? (Answer to 2 d.p) - CORRECT ANSWER >>> 85/1000 x 146 = 12.4 x 0.07 = 0. 18/1000 x 146 = 2.628 x 0.07 = 0. 0.868 - 0.18396 = 0.