Oilers/Plant Tenders (HHC) Civil Service Practice Exam

Under what condition can water be used as a lubricant?

1. Only for heavy machinery

2. It cannot be used as a lubricant

3. Under certain conditions

4. Only in cold environments

The correct answer is: Under certain conditions

Water can indeed be used as a lubricant under certain specific conditions. It has unique properties that can be advantageous, particularly in applications where high temperatures are not present and where the materials involved are compatible with water. For instance, in some industrial processes, water may be used as a coolant and lubricant simultaneously, which can reduce friction and maintain temperature control. Under certain conditions, such as when specific surface materials are used and when lubricating surfaces do not allow for water to evaporate or degrade, water can effectively reduce wear and tear. Additionally, water is often employed in processes involving metalworking or machining due to its ability to cool and lubricate simultaneously, which can enhance the precision of cutting operations. Using water as a lubricant may not be effective or appropriate everywhere, particularly in cases where higher temperatures, heavier loads, or specific environmental conditions would lead to evaporation or corrosion. Thus, recognizing that there are particular situations where water can serve effectively as a lubricant highlights the importance of context in lubricant selection.