Oilers/Plant Tenders (HHC) Civil Service Exam 2026 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 440

True or False: The primary purpose of a lubricant is to prevent direct contact between two rubbing surfaces.

True

The statement regarding the primary purpose of a lubricant being to prevent direct contact between two rubbing surfaces is true. Lubricants create a film that separates surfaces, thereby minimizing friction and wear which could lead to damage or failure of mechanical components. By keeping the surfaces apart, lubricants help in reducing heat generation, preventing corrosion, and enhancing the overall efficiency and lifespan of machinery.

While lubricants may serve additional roles depending on the application—such as cooling, cleaning, or sealing—the fundamental and most critical role remains that of minimizing direct contact between surfaces. This is essential for maintaining optimal operation and performance in a variety of mechanical systems.

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False

Depends on application

Not always true

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