Lubrication systems test 2023 with complete solution
List five functions of the oil in an engine lubrication system.
Cools, Cleans, seals and cushions, prevents corrosion, and reduce friction.
The resistance of an oil to flow is known as its ________.
Viscosity.
Oil that flows freely has a ____ viscosity.
Low.
The oil used in reciprocating engines has a relatively _____ (high or low) viscosity.
High.
The measure of the change in viscosity with a given change in temperature is know as
the ______ ________.
Viscosity index.
An engine lubricating oil whose viscosity changes very little for a given change in
temperature has a _______ viscosity index.
High.
The point at which liquid will begin to give off ignitable vapors is known as the _______
point.
Flash.
Aviation 80 engine oil has the same viscosity as SAE ____
40
The use of straight mineral oil in aircraft reciprocating engines is associated with what
conditions?
New/newly overhauled engines and older engines.
The lubricating properties of straight mineral oil _______ (are/are not) as good as those
of ashless dispersant oil.
Are not.
Synthetic lubricating oils are ______ (multi or single) viscosity oils.
Multi
If incompatible oil has been added to a turbine engine, it is often necessary to _____
and ______ the oil system before refilling with the proper oil.
Flush and refill.
Turbine engine oils ______ (do or do not) use a standard identification system.
Do not.
SAE numbers _____ (are or are not) used to identify turbine oils.
Are not.
Two types of lubricating systems for reciprocating aircraft engines are _________ and
___________.
Wet sump and dry sump.
The lubricating is distributed to the parts of a reciprocating engine by these three
methods:
Pressure, Splash, and combination (spray).
The main disadvantages of a wet-sump engine are:
Size is limited, cooling is less efficient, and temperature is higher.
What two markings must be on the oil filler cap?
Oil, and the tank capacity.
List five functions of the oil in an engine lubrication system.
Cools, Cleans, seals and cushions, prevents corrosion, and reduce friction.
The resistance of an oil to flow is known as its ________.
Viscosity.
Oil that flows freely has a ____ viscosity.
Low.
The oil used in reciprocating engines has a relatively _____ (high or low) viscosity.
High.
The measure of the change in viscosity with a given change in temperature is know as
the ______ ________.
Viscosity index.
An engine lubricating oil whose viscosity changes very little for a given change in
temperature has a _______ viscosity index.
High.
The point at which liquid will begin to give off ignitable vapors is known as the _______
point.
Flash.
Aviation 80 engine oil has the same viscosity as SAE ____
40
The use of straight mineral oil in aircraft reciprocating engines is associated with what
conditions?
New/newly overhauled engines and older engines.
The lubricating properties of straight mineral oil _______ (are/are not) as good as those
of ashless dispersant oil.
Are not.
Synthetic lubricating oils are ______ (multi or single) viscosity oils.
Multi
If incompatible oil has been added to a turbine engine, it is often necessary to _____
and ______ the oil system before refilling with the proper oil.
Flush and refill.
Turbine engine oils ______ (do or do not) use a standard identification system.
Do not.
SAE numbers _____ (are or are not) used to identify turbine oils.
Are not.
Two types of lubricating systems for reciprocating aircraft engines are _________ and
___________.
Wet sump and dry sump.
The lubricating is distributed to the parts of a reciprocating engine by these three
methods:
Pressure, Splash, and combination (spray).
The main disadvantages of a wet-sump engine are:
Size is limited, cooling is less efficient, and temperature is higher.
What two markings must be on the oil filler cap?
Oil, and the tank capacity.
