TB 60 - Methanol Vehicles Flashcards
(26 cards)
What chemical family does methanol fuel fall under?
Alcohol
What is the hydrocarbon that methanol produces?
Methane
Methanol fuel is clear, colorless, volatile, and a flammable liquid with a faint odor of what?
Alcohol
Methanol is also known as what?
Methyl alcohol
Carbinol
Wood alcohol
Methanol is producer by what 3 methods?
High pressure catalyst synthesis from carbon monoxide and hydrogen
Partial oxidation of natural gas hydrocarbons
Destructive distillation of wood
What is the density of methanol times the density of air, which tends to settle in low areas?
1.1 times
Methanol is more chemically reactive than diesel or gas and will what to some metals and plastics such as carbon steel and aluminum?
Corrode
Methanol will mix with water, it is still flammable when diluted with approximately what part water to methanol ratio?
5:1 (5 parts water, 1 part methanol)
Methanol falls under what classification?
Class I-B
Evaporation of the liquid at ordinary room temperatures creates a potentially explosive methanol-air mixture when the methanol content reaches what percent volume?
6%
Methanol air mixtures containing what percentage volume do not flash because these mixtures are too rich to burn?
36 percent
A fire hazard exists if the storage temperature of methanol in contact with air approaches the flash point of what degree?
52 degrees (11C)
Unlike gasoline, methanol burns with low what, which makes the flames hard to see in daylight and virtually invisible in bright sunlight?
Flame luminosity
The luminosity of burning pure methanol is about what of the luminosity of a comparably sized gasoline fire?
1/3000
The reason methanol fires are less visible than gasoline or diesel fuels is that burning methanol produces no what?
Soot
Fire suppression and rescue personnel may have to rely on alternate signs of burning such as involvement of ordinary combustibles or visible emissions of what without flame?
Vapor
The greatest danger from methyl alcohol is its toxic effect upon what part of the body?
The eyes
Exposure to alcohol liquid may cause the skin to become dry and cracked and what can occur through breaks in the skin?
Poisoning
What methods of extinguishment are the most effective for methanol fires?
Dry chemical extinguisher
Halon (buses equipped in engine compartment)
AFFF/ATC
Water in conjunction with dry chem or CO2
How many gallons of AFFF/ATC does S and M have available?
700 gallons
Because methanol has a lower fuel value than gasoline, a methanol powered vehicle requires a fuel tank approximately how much larger than that of gasoline?
Twice the size
Where is the engine fuel filler located on the bus?
Behind small access door on right hand side of bus
To prevent what a fuel cooling system is located next to the fuel pump?
Vapor lock
How many 20 pound halon 1301 cylinders are mounted beneath the chassis on busses?
2
