quiz lesson 5

Motor will not improve the efficiency of

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Unformatted text preview: t is the annual operating cost of the refrigerator, if the cost of electricity is $0.11 per kWh? Correct C ) 119.25 Annual operating cost = 198/1000 x 15 x 0.11 x 365 = $119.245 Horizontal axis (front loading) washing machines are more efficient compared to top loading models. Correct A ) TRUE Horizontal axis (front loading) washing machines are more efficient compared to top loading models. Heat pumps provide no extra savings compared to conventional water heaters. Correct B ) FALSE Heat pumps provide higher savings compared to conventional water heaters. Calculate the amount of heat energy required to heat 151 lbs of water from 57oF to 129oF. Correct A ) 10872 Btus Amount of heat energy required = 151 x (129- 57) = 10872 BTUs Refrigerators are heat _________. Correct A ) Movers Refrigerators are heat movers. Water heaters consume energy _____. Correct C ) irrespective of whether we use hot water or not Water heaters consume energy irrespective of whether we use hot water or not because heat is constantly lost to the surroundings What is the term used to define the energy efficiency of a dishwasher? Correct D ) EF Energy Factor (EF) is used to define energy efficiency of a dishwasher. Thermosiphon systems are most efficient in areas with ____ levels of solar radiation. Correct A ) High Thermosiphon systems are most efficient in areas with high levels of solar radiation. What kind of a label do all electrical appliances have? Correct A ) Energy Guide All appliances have an Energy Guide label. Which of the following is the most efficient for heating water? Correct C ) Heat Pump Using heat pump is the most efficient way for heating water A family of four, each showering for five minutes a day, uses 700 gallons of water every week. Installing a low- flow non- aerating showerhead can cut this consumption by how much? Correct D ) 0.5 Using a low flow non- aerating showerhead can cut water consumption by about 50%. Calculate the amount of heat energy required to heat 177 lbs of water fro...
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