Engineering Board Exam Reviewer · Environmental Engineering · hard
A landfill must hold 36,500 m3 of compacted waste per year, plus 25% extra volume for daily cover. If it is filled to an average depth of 10 m, what area is needed per year?
- 3,650 m2
- 45,625 m2
- 4,563 m2
- 2,738 m2
Answer
C. 4,563 m2
Solution
V = 36,500 × 1.25 = 45,625 m3. A = V/depth = 45,625/10 = 4,563 m2.
More Environmental Engineering questions
- A city produces 60 tonnes of solid waste per day. If the waste is compacted to a density of 600 kg/m3 in a landfill, what volume is needed…
- A city of 100,000 people generates 0.6 kg of solid waste per capita per day. What is the daily waste generation?
- A sound intensity that is 1000 times the reference intensity corresponds to a sound intensity level of:
- With a machine running, the noise level is 95 dB. With the machine off, the background level is 88 dB. What noise level is due to the…
- A point source produces 90 dB at 10 m. Assuming free-field spreading (inverse square law), what is the sound level at 40 m?
- Two noise sources produce 90 dB and 85 dB at a point. What is the combined sound level?
- Three identical machines each produce 85 dB at a point. What is the combined sound level?
- Two machines each produce a sound level of 80 dB at a point. What is the combined sound level?
- Using a global warming potential of 28 for methane, what is the CO₂-equivalent of 10 tonnes of methane emissions?
- A household uses 300 kWh of electricity per month. If the grid emission factor is 0.7 kg CO2/ kWh, what are its annual CO2 emissions from…