Oilers/Plant Tenders (HHC) Civil Service Practice Exam 2026 - Free Oilers & Plant Tenders Practice Questions and Study Guide

A good lubricant should always possess minimum impurities because the presence of contaminants can degrade its performance and shorten the life of the equipment being lubricated. Impurities can cause increased friction, corrosion, and wear, leading to potential failures and malfunctions. Clean lubricants are essential in maintaining optimal operating conditions, reducing wear rates, and ensuring that machinery functions smoothly over time. Thus, it's vital for lubricants to be formulated and maintained in a way that minimizes impurities for the best performance and reliability.