Oilers/Plant Tenders (HHC) Civil Service Practice Exam

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What are turbine oils characterized by?

High viscosity and low filtration
High demulsibility and high refinement
Low demulsibility and low refinement
Unrefined and thick consistency

The correct answer is: High demulsibility and high refinement

Turbine oils are specifically formulated to meet the demands of high-temperature and high-speed applications found in steam and gas turbines. They are characterized by high demulsibility, which is the ability to separate water from the oil, facilitating better performance and longevity of the equipment. Additionally, these oils undergo high refinement processes to ensure they possess low levels of impurities and higher stability, which is essential for maintaining the operational integrity and efficiency of turbine systems. This combination of high demulsibility and high refinement allows turbine oils to effectively protect the machinery, reduce wear, and minimize the buildup of deposits, which can compromise the function of the turbines. The refined nature of these oils also contributes to their ability to maintain viscosity at various operating temperatures, further enhancing their suitability for turbine applications.