FAA Powerplant Written Practice Test

What designation is used on the fillers for oil tanks on reciprocating engines?

1. "Fuel"

2. "Lubrication"

3. "Oil"

4. "Engine Oil"

The correct answer is: "Oil"

The designation used on the fillers for oil tanks on reciprocating engines is "Oil." This label is important for indicating the specific function of the tank and ensuring that maintenance personnel and operators can easily identify it. The word "Oil" provides clarity regarding the type of fluid that should be added to the tank, which is essential for the engine's lubrication system. Using the term "Oil" helps to prevent confusion with other fluids, such as fuel, which is vital in maintaining the operational integrity of the engine. Proper labeling is a crucial safety measure, as incorrect filling could lead to severe engine malfunctions or damage caused by using the wrong type of fluid. While other terms such as "Fuel" and "Lubrication" may describe different systems or functions, they do not specifically indicate the type of fluid required for the oil tank. "Engine Oil" is another potential label, but "Oil" is the standard term recognized in aviation practices for the oil tank filler, ensuring consistency across various aircraft engines and promoting clear communication among maintenance personnel.