Lubricants And Fuels Flashcards
What are the tasks of a lubricant
Lubrication
Cooling
Cleaning
Corrosion protection
How does a protective film work
Reduces friction and wear
The heat of materials is transferred to the oil i cooling
What is viscosity
Resistance in a fluid to flow
What is fluidity
The opposite to viscosity
What are the two types of oil
Synthetic and mineral
Where is synthetic oil used
Jet engine
Where is mineral oil used
Piston engines
What type of synthetic fuel is used on modern aircraft
type 2
What type of fuel is used on special aircraft and why
Type 3 because it has higher thermal stability and viscosity at higher temperatures
What are the downsides to synthetic oil
Price
Skin irritation
Not always mixable
What is volatility
Measure of ease liquid converts into vapour
How are factors affecting performance offset
Additives used to improve performance and impart new properties
Most used fuel in Europe and freezing point
JetA1
-47
Most used fuel in USA and freezing point
Jet A
-40
Where is JETB used and what’s its flash and freezing point
Military
-20 and -58
JP5 flash and freezing point
65 and -48
What’s essential when handling fuel
Bonding and ground equipment is essential
Where can you never fuel aircraft
In hangar
What’s the requirements for jet fuel
Low freezing point and flash point
Low enough for ignition capabilities and high enough for safe handling
What are 3 precautions in regards to heat sources
No naked flames
No smoking
No refuelling while engines running
What’s the need for tank access socks
Minimise damage to the inside of fuel tank
When entering tank what needs to be outside
Gas measuring equipment set up outside
What is a category 1 tank
Direct access door for head and shoulders only
What is a category 2 tank
Direct access door for complete body
What is different to a category 3 door compared to 1 and 2
No direct access door however internal opening which is wide enough for rescue
Why would mechanical cutters be required for category 4 fuel tank
Not wide enough for rescue
