The tightness of a two-way solenoid valve depends to a degree on pressure acting downward on the ____.
a. sealing disc
b. spring
c. retainer
d. stem
a. sealing disc
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If an I beam is 432 cm long, how long is it in inches? Round the answer to the nearest hundredths.
Bioswales are engineered basins used to _____.
a. percolate water back into the soil b. convey water to the stormwater sewer c. transport water to the treatment plant d. contaminate local streams
Nitrification is a two-step process with nitrite (NO2-) being formed in step one and then nitrite being oxidized to nitrate (NO3-) in step 2. Which bacteria are responsible for step 2?
a. Nitrosomonas b. Nitrobacter
This refers to a balance between producing and using carbon, especially balancing carbon-dioxide emissions by activities such as growing plants to use as fuel or planting trees in urban areas to offset vehicle emissions:
A. carbon offset B. carbon footprint C. carbon neutral D. carbon reduction E. none of the above