EXAM ONE SOLUTIONS - Name _ CE 280: Principles of...

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Name ____________________________ CE 280: Principles of Environmental Engineering and Science Exam 1 – Spring 2008 Closed Book Exam QUESTIONS (50 points) 1. (6 points) Which “Act” regulates wastewater discharges (3 points), and which “Act” regulates hazardous wastes disposed of after 1980 (3 points)? Clean Water Act (CWA) (3 points) Resource Conservation and Recovery Act (RCRA) (3 points) 2. (3 points) Name the “Act” that affects most directly human health and sets the maximum contaminant levels (MCLs) on a list of specific chemicals detrimental to human health. Safe Drinking Water Act (SDWA) (3 points) 3. (6 points) State the law of conservation of mass (3 points). Write in words, the general form of mass balance equation (3 points). The law of conservation of mass states that “Disregarding nuclear reactions, mass can neither be created nor destroyed”. (3 points) The general form of mass balance is: (3 points) [Accumulation rate]=[input rate] – [output rate] ± [reaction rate] 1
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Name ____________________________ 4. (3 points) State the first law of thermodynamics (i.e., law of conservation of energy) Energy can neither be created nor destroyed (3 points) 5. (6 points) When two objects are at different temperatures, heat will be transferred from the hotter object to the colder one. State the mechanisms of heat transfer. Conduction
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EXAM ONE SOLUTIONS - Name _ CE 280: Principles of...

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