quiz lesson 5

The particular model correct

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Unformatted text preview: cient 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. An old refrigerator consumes 178 W of power. Assuming that the refrigerator operates for 15 hours every day, what is the annual operating cost of the refrigerator, if the cost of electricity is $0.06 per kWh? Correct D ) 58.47 Annual operating cost = 178/1000 x 15 x 0.06 x 365 = $58.473 Calculate the amount of heat energy required to heat 185 lbs of water from 61oF to 134oF. Correct C ) 13505 Btus Amount of heat energy required = 185 * (134 - 61) = 13505 BTUs. An old refrigerator consumes 210 W of power. Assuming that the refrigerator operates for 19 hours everyday, what is the annual operating cost of the refrigerator, if the cost of electricity is $0.06 per kWh? Correct A ) 87.38 Annual operating cost = 210/1000 x 19 x 0.06 x 365 = $87.381 112 gal of water is heated in a heater from 55oF to 136oF everyday by a family. What is the annual energy requirement of the water heater? Correct B ) 27483624 Btus 1 gal of water weighs 8.3 lbs Annual Energy requirement = 112 x 8.3 x (136- 55) x 365 = 27483624 BTUs Solar water heating systems _____ the amount of heat that must be provided by conventional energy sources like electricity generated from fossil fuels. Correct A ) Reduces Solar water heating systems reduces the amount of heat that must be provided by conventional energy sources like electricity generated from fossil fuels Leaking faucets can increase your energy costs. Correct A ) TRUE Leaking faucets can increase your energy costs. Normally dishwashers require a water temperature of Correct B ) 140 F Normally dishwashers require a water temperature of 140 F Using a low flow non- aerating showerhead can cut water consumption by about 50%....
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