Oilers/Plant Tenders (HHC) Civil Service Practice Exam

What must the lubricant do in the lubrication of the steam cylinder of a marine reciprocating steam engine?

1. Be chemically stable

2. Be atomized by the steam

3. Be heat-resistant

4. Be biodegradable

The correct answer is: Be atomized by the steam

In the context of the lubrication of the steam cylinder of a marine reciprocating steam engine, the lubricant's ability to be atomized by the steam is crucial. The steam that enters the cylinder not only serves to drive the engine but can also carry the lubricant into areas that require protection and lubrication. When the lubricant is atomized, it allows for even distribution throughout the cylinder surfaces, ensuring that moving parts maintain a necessary film of oil, reducing friction and wear. This helps to prolong the life of the engine components and maintain efficient operation. While chemical stability, heat resistance, and biodegradability are important properties for lubricants in various applications, in this specific scenario, the ability to become atomized is key to ensuring that the lubricant reaches all necessary areas. Each of these other properties may play a role in different contexts of lubrication, but they do not specifically address the unique requirements presented by the steam's role in delivering the lubricant within the engine's cylinder.