The flashcards below were created by user
-when would straight mineral oil be used on reciprocating aircraft engines?
During engine break in process
-what are you doing during the engine break in process?
Seating the rings to the cylinder walls
-what type of oil is usually recommended by engine manufacturers for use after break in?
-what does ash less dispersant oil do?
Suspends particals (Will collect sludge carbon and varnish until filtered)
-where is the filter bypass valve located in an oil system of an opposed aircraft system?
Between the pressure pump and the internal oil system
-what determines the size of the particles passing through a cuno filter?
Spacing of the discs
-in addition to a gear driven pump what other component is commonly found in aircraft reciprocating engines to lubricate engine parts?
-which statement is true regarding engine oil lines?
Oil lines ID must not be less than the ID of the inlet and outlet of the pump
-which statement is true of oil dilution?
The dilution process will burn off while the engine is running
-what must be the expansion space in an oil tank according to FARs?
10% or ½ gallon whichever is greater
-which statement is true of a dry sump engine?
Do not have the oil sump attached to the bottom of the engine
-what type of inspection must be done after removal of a full flow oil filter?
Cut it open and inspect the element for metal and debris
-how are rocker arms lubricated in a reciprocating engine?
Through drilled passageways in the push rods
-how is a prevision made for a reserve oil supply for prop feathering on large aircraft?
-operating clearances between engine parts will increase over time as a consequence of normal use what must occur to maintain steady oil pressure when parts wear?
The oil quantity must be increased as resistance to flow decreases
-what effect on oil flow will a completely clogged oil filter have on the system?
Normal oil flow
-what will occur if an engine is operated with a very low oil supply?
Oil temperature will increase due to lower heat dissipation caused by the reduced oil supply
-how do worn connecting rod bearings contribute towards increased oil consumption?
More oil is splashed on the cylinder walls and burned in the combustion chamber
-what would happen if the scavenge pump failed?
Engine would get flooded with oil
-what would be a likely cause of oil found inside the rocker box cover of a reciprocating aircraft engine?
This is normal
-why is high viscosity oil used in aircraft reciprocating engines?
Because of the large clearances and high operating temperatures
-why is the scavenge pump capacity usually larger than pressure pump capacity?
To prevent over flooding of the crank case
-during oil dilution where is the fuel discharged into the oil system?
The inlet of the pump
-what type of operational test should be performed on an oil pump after overhaul?
Put it on a test stand and evaluate the pump output
-what would be a possible cause of metal particles found in the oil filter screen during inspection?
Possible internal failure that should be further evaluated
engine lube test for p2