Questions and Solutions
Graded A+
NAAQS six criteria pollutants - Answer: Carbon monoxide, dioxide, Nitrogen Dioxide, Sulfur
Dioxide, Particulate matter, lead, & Ground-level Ozone
Clean Air Act 1973 - Answer: Requires EPA to maximum allowable concentrations of six
"criteria" pollutants in outdoor air @ national level
PCB ( Polychlorinated biphenyls) - Answer: transformer coolant, plasticizers, carbonless paper
DDT ( - Answer: From pesticides- Silent Spring 1962
Superfund - Answer: Est by CERCLA(1980) Comprehensive Environmental Response,
Compensation, and Liability Act (CERCLA)
(CERCLA) - Answer: Law created a tax on the chemical and petroleum industries, provided for
liability of persons responsible for releases of hazardous waste at these sites
(NPL) - Answer: National Priorities List, list of hazardous waste sites in the United States eligible
for long-term remedial action (cleanup) financed under the federal Superfund program
(SARA) - Answer: Superfund Amendments and Reauthorization Act, amended CERCLA in 1986
, Clean Water Act (1972) SDWA - Answer: Main federal law that ensures the quality of Americans'
drinking water
"Priority" pollutants - Answer: biochemical oxygen demand, total suspended solids, fecal
coliform, oil and grease, and pH
National Pollutant Discharge Elimination System (NPDES) - Answer:
- Answer: Unconfined when its upper surface (water table) is open to the atmosphere through
permeable material
Groundwater - Answer: aquifers below the surface of the Earth, source of 37% of water
Metamorphic rock - Answer: Original rock is subjected to very high heat and pressure
Foliated metamorphic rocks - Answer: (gneiss, phyllite, schist, and slate
Non-foliated metamorphic rocks - Answer: hornfels, marble, quartzite,granulite
Reason for brittle in steel while equilibrium cooling - Answer: brittle carbide plates form thin
plates in slow cooled
Low-carbon used as rolled or fabricated (chromium content is low ) - Answer: due to their
strength's ability to increase by heat treatment
face centered cubic structure in steel - Answer: austenite