Why was lead once a serious atmospheric contaminant? How was that problem solved?
What will be an ideal response?
It was used in gasoline to increase the efficiency of engines. In the United States, conversion to unleaded gasoline
was mandated in the 1970s and lead in gasoline was prohibited beginning in 1995. Most other countries followed
about the same timeline. Lead is no longer a major atmospheric problem.
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Explain how a hot bitumen built-up roof membrane is created and why this specific technique is used.
What will be an ideal response?
U.S. labeling requirements are science based
Indicate whether the statement is true or false
Axial fans are commonly used on applications where:
A) Large volumes of air are required at a relatively high static pressure. B) Reverse loading of the blower bearings is desired. C) Small volumes of air are required at a relatively high static pressure. D) Large volumes of air are required at a relatively low static pressure.
The washer fluid reservoir often has a _________ cap to help identify it as the washer fluid.
Fill in the blank(s) with the appropriate word(s).