15.9 LUBRICANTS/FUELS Flashcards
why did we have to stop using mineral oils as we improved engines
they lacked stability and had excessive volatility
what is the function of engine oil
lubricating, cooling, cleaning, corrosion protection
what are the types of oil
synthetic and mineral
what are the different types on synthetic oil
type 1, type 2, type 3
which type of synthetic oil is mostly used on modern engines
type 2
what are the advantages of synthetic oil
better viscosity, better thermal stability, higher pressure resistance
whats the disadvantage of synthetic oil
expensive
what is a viscosity index
effect temperature has on an oils viscosity
what is the pour point of an oil
the point at which an oil will visibly move
what is the pour point of type 2 oils
-57 degrees celcius
what is the flash point of an oil
the lowest point an oil will give off enough vapour to flash when a flame is applied
what is the flash point of type 2 oils
higher than 250 degrees cecius
oxidation is the reaction between what
oil and oxygen
a typical fuel will be composed of approximately what
16% hydrogen, 84% carbon
what are all the types of turbine engine fuel
jet a1, jet a, jet b, jp5
what is the most common use fuel for engines in europe
jet a1
what aircraft is jp 5 used on
military aircraft
what are the 2 main requirements for jet fuel
low freezing point, flash point low enough for good ignition
what do additives do when added to fuel
prevent things happening in the fuel mixture
what does MSDS stand for
material safety data sheet
are synthetic oils storage stable
no
what fuel is used in america
jet a
whats the freezing point of jet a
-40
whats the freezing point for jet a1
-47
whats jp5 flash point and freezing point
flash point - 65
freezing - -20
whats a serious problem with water in fuel
microbial growth
