Installing a low flow non aerating showerhead

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Unformatted text preview: efficient Which of the following actions is not likely to improve the efficiency of a refrigerator? Correct C ) switching the motor from a DC motor to a more efficient AC motor Switching the motor from a DC motor to a more efficient AC motor will not improve the efficiency of the refrigerator. An old refrigerator consumes 212 W of power. Assuming that the refrigerator operates for 18 hours every day, what is the annual operating cost of the refrigerator, if the cost of electricity is $0.09 per kWh? Correct C ) 125.36 Annual operating cost = 212/1000 x 18 x 0.09 x 365 = $125.355 Insulating the cold water pipes will save a lot of energy. Correct B ) FALSE Insulating the hot water pipes will save a lot of energy, by reducing the heat lost to the surroundings. All major home appliances have an _____. Correct C ) Energy Guide label All major appliances have an energy guide label Bottom mounted refrigerators are _____ efficient compared to top mounted refrigerators. Correct A ) More Bottom mounted refrigerators are more efficient compared to top mounted refrigerators. For energy- efficient operation of a dishwasher _____. Correct D ) all of the above For energy- efficient operation of a dishwasher 1. wash only full loads 2. use the no- heat air dry feature 3. don't pre- rinse dishes before putting them in the dishwasher 200 gal of water is heated in a heater from 61oF to 128oF everyday by a family. What is the annual energy requirement of the water heater? Correct B ) 40595300 Btus 1 gal of water weighs 8.3 lbs Annual Energy requirement = 200 x 8.3 x (128- 61) x 365 = 40595300 BTUs Solar water heating systems reduce the amount of heat that must be provided by conventional energy sources such as electricity. Correct A ) TRUE Part of the energy used by solar water heating systems comes from solar energy. Therefore the amount of heat that must be provided by conventional energy sources is reduced. What steps can lead to an energy efficient operation of a dishwasher? Correct D ) all of the above For energy- effi...
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This note was uploaded on 09/24/2013 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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