15.09 Flashcards
Where are mineral oils used
On piston type engines
Are synthetic oils be storage stable
NO
What is the viscosity index?
Effect temperature has on the viscosity of the oil.
What is an alternative fuel type for Jet A1
Jet B
What must you do if to ingest synthetic oil
Drink 250m of water and get medical help
What is created during refuelling
Electric static charge
What is the American name for Jet A1 fuel
JP 1A
What is free point for jet A1 fuel
-47C
What are type 3 synthetic oils
They have higher thermal stability and viscosity at high temperatures.
What is the most common fuel type used in America
Jet A
What is the freeze point jet a fuel
-40C
What do category two fuel tanks have
Direct access door and wide enough to gain access
What are the four types of turbine engine fuel
Jet A1
Jet A
Jet B
JP5
Typical fuel will be composed of what
16% hydrogen and 84% carbon and small impurities
What do category one fuel tanks have
Direct door access , but you cant get in completely
What do category three fuel tanks have
No direct external access door, internal opening
What are Type 2 synthetic oils
Used on modern GTE
How is fire created
Oxygen,heat ,fuel
What doe anti oxidants prevent
The formation of gum deposits
What is rubber swelling
Amount of oil that can cause rubber to swell
What type of fuel must be recorded when refuelling
JP5
What is the fuel density of Jet A1 and Jet A fuel at 15 degrees C
0.81kg/lhr
How many types of synthetic oils are there and what are they called
There are 3 type,
Type 1
Type 2
Type 3
What are the two types of military fuel type
JP 4 and JP5
What are Type 1 synthetic oils
First Generation, used on older gas turbine engines
What does acidity measures
The corrosive tendencies of the oil
Where are synthetic oils used
On jet engines
What are category four fuel tanks
Only via internal openings
To get out of these tanks mechanical cutters must be used
What type of oil was used in the earlier gas turbine engine development
Mineral oil
What is the disadvantage of synthetic oils
High price 💰💰💰
What material is used to protect sparks
Cotton
What is the main task of oil on jet engines
Lubricating
Cooling
Cleaning
Corrosion protection
What should the appearance of fuel be
Clear,bright & free from solid matter
What is oil foaming
The measure of the resistance of oil to separate from entrapped air
Why was synthetic oils developed for gas turbine engines
As they have better properties
What can fuel handling safety procedures be divided into
Fire prevention
Fire extinguishing
Personnel safety
What type of synthetic oil would you use on special aircrafts such as the Eurofighter.✈️
Type 3
What is the pour point
The lowest temperature that oil will visibly move in a 31.75mm test tube held horizontally for 5 seconds
What is the minimum flash point for Jet A1 fuel
38 degrees C or 100F
What is the most common fuel type used in Europe
Jet A1
Where does fuel vapour mainly come from
Fuel vent tanks or fuel leakes
What is the advantage of synthetic oils
Better:
Velocity
Thermal stability
High pressure resistance
Can you mix synthetic oils with other synthetic oils from other manufacturer even if they are the same type
NO!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
What should the freezing point of fuel for turbine engines should be below
-40C
In what fuel type would you use kerosene
Jet A
Jet A1
What type of fuel type is used on military aircrafts
JP5
What is coking
Amount of carbon residue remaining in the oil after being subjected to extreme heating
