What are the three main purposes of oil?

What are the three main purposes of oil?

• A. Lubrication, Cooling, Cleaning
• B. Lubrication, Cooling, Sealing
• C. Cooling, Cleaning, Damping
• D. Lubrication, Cleaning, Heating

Answer: (A)

Oil serves three primary roles in mechanical systems: lubrication to minimize friction between moving parts, cooling by carrying heat away from hot components, and cleaning by suspending and transporting contaminants to filters and the sump. These functions keep parts moving smoothly, prevent excessive wear, and help prevent deposits that could impair performance. While oil can participate in sealing some gaps in a system, that isn’t considered one of the main purposes of oil. Damping and heating aren’t target functions of oil in this context—damping isn’t a primary oil function, and heating is something you want to avoid rather than purposefully rely on oil to provide.

Oil serves three primary roles in mechanical systems: lubrication to minimize friction between moving parts, cooling by carrying heat away from hot components, and cleaning by suspending and transporting contaminants to filters and the sump. These functions keep parts moving smoothly, prevent excessive wear, and help prevent deposits that could impair performance. While oil can participate in sealing some gaps in a system, that isn’t considered one of the main purposes of oil. Damping and heating aren’t target functions of oil in this context—damping isn’t a primary oil function, and heating is something you want to avoid rather than purposefully rely on oil to provide.