FAA Powerplant Written Practice Test

In a reciprocating engine, what is achieved by maintaining proper oil temperature?

1. Prevention of oil evaporation

2. Optimal engine lubrication

3. Reduction of engine weight

4. Increased fuel efficiency

The correct answer is: Optimal engine lubrication

Maintaining proper oil temperature in a reciprocating engine is crucial for optimal engine lubrication. When oil is at the correct temperature, it maintains its viscosity, allowing it to flow freely and coat engine components effectively. This ensures that moving parts are adequately lubricated, reducing friction and wear, which is essential for engine longevity and reliability. If the oil temperature is too low, the oil may become too thick, leading to insufficient lubrication and potential damage. On the other hand, if the oil temperature is too high, it can lead to oil breakdown, resulting in a loss of lubricating properties. Therefore, consistent and proper oil temperature management is vital to achieve the best lubrication performance in an engine.