Which condition would be the least likely to be caused by failed or failing engine bearings?
What is - Low oil temperatures
100
Gas turbine and reciprocating engine oils can be mixed or used interchangeably.
What is - engines oils cannot be mixed or used interchangeably.
100
The viscosity of a liquid is a measure of its
What is - resistance to flow.
100
What advantage do mineral base lubricants have over vegetable oil base lubricants when used in aircraft engines?
What is - Chemical stability.
100
The engine oil temperature regulator is usually located between which of the following on a dry sump reciprocating engine?
What is - The scavenger pump outlet and the oil storage tank.
200
What will be the result of operating an engine in extremely high temperatures using a lubricant recommended by the manufacturer for a much lower temperature?
What is The oil pressure will be lower than normal.
200
Most gas turbine engine oils are synthetic.
What is - this is a true statement.
200
Which of the following factors helps determine the proper grade of oil to use in a particular engine?
What is - Operating speeds of bearings.
200
The recommended aircraft engine lubricants are
What is - mineral or synthetic based.
200
At cruise RPM, some oil will flow through the relief valve of a gear-type engine oil pump. This is normal as the relief valve is set at a pressure which is
What is - lower than the pressure pump capabilities.
300
In addition to lubricating (reducing friction between moving parts), engine oil performs what functions?
What is Cools, Seals, Cleans, Prevents corrosion, Cushions impact (shock) loads.
300
Upon what quality or characteristic of a lubricating oil is its viscosity index based?
What is - Its rate of change in viscosity with temperature change..
300
Specific gravity is a comparison of the weight of a substance to the weight of an equal volume of
What is - distilled water at a specific temperature.
300
High tooth pressures and high rubbing velocities, such as occur with spur-type gears, require the use of
What is - an EP lubricant.
300
What prevents pressure within the lubricating oil tank from rising above or falling below ambient pressure (reciprocating engine)?
What is - Oil tank vent.
400
If the oil pressure of a cold engine is higher than at normal operating temperatures, the
What is - engine's lubrication system is probably operating normally.
400
The oil used in reciprocating engines has a relatively high viscosity due to
What is -large clearances and high operating temperatures.
400
If the oil pressure of a cold engine is higher than at normal operating temperatures, the
What is - engine's lubrication system is probably operating normally.
400
From the following, identify the factor that has the least effect on the oil consumption of a specific engine.
---Mechanical efficiency
---Engine RPM
---Lubricant characteristics
---No answer text provided
What is - Mechanical efficiency
400
What unit in an aircraft engine lubrication system is adjusted to maintain the desired system pressure?
What is - Oil pressure relief valve.
500
The engine oil temperature regulator is usually located between which of the following on a dry sump reciprocating engine?
What is - The scavenger pump outlet and the oil storage tank.
500
If all other requirements can be met, what type of oil should be used to achieve theoretically perfect engine lubrication?
What is - The thinnest oil that will stay in place and maintain a reasonable film strength.
500
An oil separator is generally associated with which of the following?
What is - Engine-driven vacuum pump.
500
If an engine operates with a low oil pressure and a high oil temperature, the problem may be caused by a
What is - leaking oil dilution valve.
500
Low oil pressure can be detrimental to the internal engine components. However, high oil pressure
What is - should be limited to the engine manufacturer's recommendations.