Engine Lubrication Systems Flashcards
What are six functions of the oil in an aircraft engine?
Reduce friction
Seals and cushions
Removes heat
Cleans inside the engine
Protects against corrosion
Perform hydraulic action
What is the purpose of an air oil separator, or deaerator in a turbine engine oil tank
In normal operation, the oil picks up a quantity of air and it is swirl as it enters the deaerator The swirling action releases the air from the oil, and the air is used to pressurize the oil tank.
How is oil pressure regulated in an aircraft engine?
A pressure, relief valve senses, the desire pressure and send excess oil back into the engine sump
What is the purpose of the restricted orifice in the line between the oil pressure gauge and the engine?
The restricted fitting helps dampen any pulsations in the oil caused by the pump
What is a hot tank lubrication system for a turbojet engine
A lubrication system in which the oil cooler is in the pressure subsystem and the scavenge oil is not cool before it is returned to the Tank
What is a cold tank lubrication system for a turbo jet engine
A lubrication system in which the colder is in the scavenging sub system and the scavenge oil is called before it is returned to the Tank
What two instruments show the condition of a reciprocating engine lubrication system
Oil, pressure and oil temperature gauges
What must be done to an oil filter when it is removed from an engine?
It should be cut open and pleated element, examine to determine the type and amount of contaminant carried by the oil
What is a spectrometric oil analysis program?
A program in which a sample of the oil is taken from the engine at intervals and sent to a laboratory
What type of oil quantity indicator is used on most aircraft engines?
A dipstick that measures the quantity of oil in the tank or something
When should the engine oil quantity be checked on a turbine engine?
As soon as practical after the engine is shut down
Where is the oil temperature measured on a reciprocating engine?
Usually at the oil pressure screen before the oil goes into the engine passages
Why do engine manufacturers recommend that engine lubricating oil be changed at specific intervals
The oil picks up contaminants and carries them through the engine where they can cause the oil also becomes acidic and caused corrosion in the engine 
