Which of the following wastes is the most recycled in the United States?  A.Car batteries; B.Paper;             C. Soda cans;    D. Yard wastes Which is the primary disposal method for municipal solid waste in the United States? A. incineration; B.         recycling;         C.         landfill;            D. none of the above What is (are) the major environmental concern(s) during landfilling?A.gas production. B. leachate generation.  C. A and B.   D. neither of A or B. The gases produced from landfills are encouraged to be used as a new energy. Which of the following in the landfill gases is (are) the effective ingredient as an energy source?  A. carbon dioxide and methane; B.         carbon monoxide and methane   C.methane;             D.        carbon dioxide

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Mechanical Processes

In civil engineering, the materials have to undergo a series of manufacturing processes before using them in construction and structural applications. These manufacturing processes form the foundation stone of mechanical processes. Some of the civil engineering materials such as bars, metallic beams, metallic columns, surveying equipment, earthmovers, overhead cranes, structural and construction components, and even cement that is the most fundamental construction component need to undergo different manufacturing processes before they are ready to use. These processes are mechanical.