CDPH Lead Inspector/Assessor California State Practice Exam

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Prepare for the CDPH Lead Inspector/Assessor Exam in California. Study with multiple choice questions, including detailed hints and explanations to enhance your understanding. Get ready for your certification!

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What percentage of all gasoline used in the U.S. contained lead from 1930-1976?

100%
70%
90%
50%

The correct answer is: 90%

The correct answer indicates that 90% of all gasoline used in the U.S. contained lead from 1930 to 1976. This high percentage is historically significant because lead was a common additive in gasoline during this period, primarily used to enhance engine performance and reduce knocking. The introduction of tetraethyl lead as a gasoline additive revolutionized automobile engines but also had severe environmental and health consequences due to lead exposure. The high prevalence of leaded gasoline during those decades resulted in widespread contamination, contributing to public health concerns and prompting regulatory changes in the later years. Starting in the 1970s, the United States began phasing out leaded gasoline as awareness of its harmful effects on health increased, eventually leading to a complete ban in 1996. Understanding this context highlights the extent of lead usage in gasoline, helping grasp the broader implications for public health and environmental safety at that time.