Oilers/Plant Tenders (HHC) Civil Service Practice Exam 2025 - Free Oilers & Plant Tenders Practice Questions and Study Guide

Refrigeration oil is specifically formulated to maintain its effectiveness in low-temperature environments, and moisture content is an important factor that can significantly affect its performance. The correct assertion is that the moisture content in refrigeration oil is usually low. This low moisture content is crucial because excessive moisture can lead to the formation of acids and sludge, adversely affecting the lubrication properties of the oil, and potentially causing system failures or reduced efficiency.

Maintaining low moisture levels is essential for optimal performance in refrigeration systems. Thus, technicians take care to handle and store refrigeration oils in a way that minimizes the introduction of moisture, such as using sealed containers and avoiding prolonged exposure to air.

In contrast, moisture content being high, negligible, or inconsistent does not reflect the realities of refrigeration oil management and does not account for the necessary precautions taken by professionals in the field to ensure the integrity and performance of the oil. The focus on maintaining low moisture levels in refrigeration oil underscores its importance in ensuring the reliability and longevity of refrigeration systems.