Oilers/Plant Tenders (HHC) Civil Service Practice Exam

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Mineral oils are usually refined from __________ products.

Natural gas
Crude Petroleum
Vegetable sources
Coal tar

The correct answer is: Crude Petroleum

Mineral oils are typically obtained through the refining of crude petroleum products. Crude petroleum is a complex mixture of hydrocarbons that, after undergoing various refining processes such as distillation, can be transformed into a range of products including mineral oils. This refining process removes impurities and separates different components based on their boiling points, allowing the extraction of various oil fractions. In contrast, natural gas primarily consists of gaseous hydrocarbons and does not yield mineral oils directly through conventional refining. Vegetable sources can produce vegetable oils, which are different from mineral oils and have distinct properties and applications. Coal tar is a byproduct of the carbonization of coal and contains several organic compounds, but it does not contribute to the production of mineral oils either. Hence, the association of mineral oils predominantly with crude petroleum underscores the accuracy of this answer.