FAA Powerplant Written Practice Test

What is a potential consequence of low oil pressure in an aircraft engine?

1. It helps with fuel efficiency

2. It can cause engine stalling

3. It can be detrimental to internal engine components

4. It increases engine temperature

The correct answer is: It can be detrimental to internal engine components

Low oil pressure in an aircraft engine is significant because oil serves multiple crucial functions in the operation of the engine, including lubrication, cooling, and the removal of contaminants. When oil pressure is low, the engine components do not receive adequate lubrication, which can lead to increased friction and wear. This inadequate lubrication can harm vital internal components, such as bearings and camshafts, ultimately leading to engine failure if not addressed. Consequently, it is critical to maintain proper oil pressure to ensure that the engine operates efficiently and safely. This consequence highlights the importance of monitoring oil pressure as part of pre-flight checks and regular maintenance protocols.