Oilers/Plant Tenders (HHC) Civil Service Practice Exam

As the temperature of oil increases, what happens to the amount of oil distributed by a ring oil bearing?

1. It gets more

2. It stays the same

3. It gets less

4. It varies unpredictably

The correct answer is: It gets less

As the temperature of oil increases, the viscosity of the oil generally decreases, which allows for easier flow. However, in the context of a ring oil bearing, the amount of oil film or distribution around the surfaces can be affected by several factors, including the relationship between temperature and the mechanical properties of the bearing surfaces. As the bearing temperature rises, the oil may start to thin out to a point where it doesn't maintain the same film thickness as at lower temperatures. This can lead to a reduction in the effective amount of oil distributed by the bearing. Additionally, increased temperatures may cause the oil to evaporate or degrade more quickly, further reducing the overall amount of oil available for lubrication. In summary, when considering the effect of temperature on oil in a ring oil bearing, as the temperature increases, the amount of oil distributed tends to decrease due to lower viscosity and potential loss of oil through other mechanisms. This highlights the importance of monitoring temperature and ensuring proper lubrication in operating conditions.