Oilers/Plant Tenders (HHC) Civil Service Practice Exam

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Which condition may increase the risk of lubrication system failure?

Proper lubrication
Increased wear and tear
Decreased temperatures
High oil viscosity

The correct answer is: Increased wear and tear

Increased wear and tear is a significant factor that can elevate the risk of lubrication system failure. As machinery operates, components experience friction and heat that lead to wear over time. When wear advances beyond acceptable limits, it can lead to increased clearances and irregular surfaces, causing the lubrication film to break down. This breakdown can allow metal-to-metal contact, resulting in overheating and eventual failure of the lubrication system. Additionally, worn components may create particles or debris that contaminate the lubricant, further compromising the lubrication's effectiveness. Hence, the ongoing wear can directly impact how well the lubrication system can function, thereby heightening the risk of system failure. Other options, while relevant to lubrication, do not inherently relate to increasing the risk of system failure in the same context as wear and tear. For example, proper lubrication is essential for system health, decreased temperatures typically help maintain lubrication effectiveness, and high oil viscosity can affect lubrication but does not directly contribute to increased wear in the same way as ongoing wear and tear does.