In a municipal wastewater treatment plant, the primary treatment step includes ________
A) chlorinating the sewage
B) stirring the sewage to increase oxidation
C) adding bacteria to the sewage
D) micro-filtering the sewage
E) letting sewage sit in large settling tanks so suspended solids settle out
E
You might also like to view...
Kirchhoff's law
A) only applies to blackbodies. B) gives the wavelength of maximum energy emission. C) states that the rate of energy emission from an object is proportional to the fourth power of its temperature. D) applies to the Sun, but not the Earth. E) holds that an object that absorbs certain wavelengths well will also be a good emitter of those wavelengths.
What is a main hazard of this type of volcano?
A) Hot molten fragments thrown a short distance from the volcano
B) Viscous lava that moves too fast for people to outrun
C) Destruction by moderately fluid lava flows that can flow far from the volcano
D) Relatively small pyroclastic eruptions caused by localized explosions or collapse
Civilization first emerged in China along the banks of the ______ river.
A. Chang Jiang (Yangtze) B. Huang He (Yellow) C. Xi Jiang (West) D. Pearl
Since the beginning of the Industrial Revolution, the increased flux of carbon into the atmosphere has been primarily due to ________
A) the addition of phosphate to detergents B) the addition of fertilizers to the soil C) the burning of fossil fuels D) desertification