EI EI Environmental & Sustainability Engineering 1 — Questions and Answers
Question 1: Which U.S. federal law is the primary statute governing the assessment of environmental impacts for major federal projects?
- National Environmental Policy Act (NEPA) (Correct answer)
- Clean Water Act (CWA)
- Resource Conservation and Recovery Act (RCRA)
- Comprehensive Environmental Response Act (CERCLA)
Correct answer: National Environmental Policy Act (NEPA)
NEPA, enacted in 1970, requires federal agencies to assess the environmental effects of their proposed actions prior to making decisions, using Environmental Impact Statements.
Question 2: What is the primary goal of a stormwater Best Management Practice (BMP) in civil engineering?
- Reduce pollutant runoff and manage stormwater volume (Correct answer)
- Increase groundwater recharge exclusively
- Prevent all surface runoff from leaving a site
- Eliminate the need for detention ponds
Correct answer: Reduce pollutant runoff and manage stormwater volume
BMPs are designed to reduce pollutants in stormwater runoff and manage the quantity and rate of runoff to protect water quality and downstream systems.
Question 3: Which parameter is commonly used to measure the strength of domestic wastewater for treatment design purposes?
- Biochemical Oxygen Demand (BOD) (Correct answer)
- Total Dissolved Solids (TDS)
- pH level
- Turbidity
Correct answer: Biochemical Oxygen Demand (BOD)
BOD measures the amount of oxygen consumed by biological organisms in decomposing organic matter, making it the standard indicator of wastewater organic strength.
Question 4: In the context of environmental engineering, what does 'point source pollution' refer to?
- Pollution discharged from a single, identifiable location (Correct answer)
- Pollution originating from agricultural runoff across large areas
- Air pollution dispersed from multiple urban sources
- Groundwater contamination with no known origin
Correct answer: Pollution discharged from a single, identifiable location
Point source pollution comes from a discrete, identifiable outlet such as a pipe or outfall, as opposed to nonpoint source pollution which originates from diffuse areas.
Question 5: The concept of 'Life Cycle Assessment' (LCA) in sustainable engineering evaluates:
- Environmental impacts of a product from raw material extraction to disposal (Correct answer)
- The operational lifespan of mechanical equipment
- Cost-benefit analysis over a project's useful life
- Maintenance schedules for infrastructure systems
Correct answer: Environmental impacts of a product from raw material extraction to disposal
LCA is a systematic analysis of the environmental impacts of a product or process throughout its entire life cycle, from cradle to grave.
Question 6: Which of the following greenhouse gases has the highest global warming potential (GWP) per molecule over a 100-year period?
- Sulfur hexafluoride (SF6) (Correct answer)
- Carbon dioxide (CO2)
- Methane (CH4)
- Nitrous oxide (N2O)
Correct answer: Sulfur hexafluoride (SF6)
SF6 has a GWP of approximately 23,500 over 100 years, making it the most potent common greenhouse gas, far exceeding CO2, CH4, and N2O.
EI EI Environmental & Sustainability Engineering 1
Which U.S. federal law is the primary statute governing the assessment of environmental impacts for major federal projects?