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KEROSENES FLASH POINT? FIRE POINT? IGNITION TEMPERATURE? EXPLOSIVE RANGE? VAPOR DENSITY? SPECIFIC GRAVITY?
100 102 400 0.7%-5.0% 2.80 .98
what has a flash point?
ANYTHING THAT BURNS
A TEMPERATURE A SUBSTANCE MUST BE HEATED TO IN ORDER TO CAUSE SELF IGNITION IS?
AUTO IGNITION TEMPERATURE
FLASH AND FIRE POINT RANGE FOR WOOD products?
over 100 degrees F
gasolines flash point? fire point? ignition temperature? explosive range? vapor density? specific gravity?
-45 -43 850 1.4%-7.6% 3.00 .75
ACETONES FLASH POINT? FIRE POINT? IGNITION TEMPERATURE? EXPLOSIVE RANGE? VAPOR DENSITY? SPECIFIC GRAVITY?
0 2 1000 2.6%-12.8% 2.00 .79
pine wood has an auto ignition temperature of what?
325 degrees to 375 degrees
WHATS THE APPROXIMATE FIRE POINT OF GASOLINE?
43 DEGREES F BELOW ZERO
WHAT TEMPERATURE DOES GASOLINE BEGIN TO RELEASE FLAMMABLE VAPORS?
45 DEGREES F BELOW ZERO
oak wood has an auto ignition temperature of what?
450 degrees F
ETHANOLS FLASH POINT? FIRE POINT? IGNITION TEMPERATURE? EXPLOSIVE RANGE? VAPOR DENSITY? SPECIFIC GRAVITY?
55 57 800 4.3%-19.0% 1.59 .79
gasoline has an average ignition temperature of what?
850 degrees F
WHATS REQUIRED TO ESTIMATE THE FLASH POINT OF A SUBSTANCE?
A LABORATORY TEST
WHAT IS THE INTRODUCTION OF AN EXTERNAL IGNITION SOMETIMES REFERRED AS?
A PILOTED IGNITION
THE 5 STEPS TO TESTING A SUBSTANCE FLASH POINT?
BEGINNING AT A COLD TEMPERATURE, SUBSTANCE IS HEATED SLOWLY SUBSTANCE GRADUALLY BEGINS TO PRODUCE VAPORS GIVE AN EXTERNAL IGNITION SOURCE VAPORS WILL EVENTUALLY FLASH AND BURN TEMP AT WHICH THIS OCCURS IS THE FLASH POINT
COMBUSTION IS WHAT TYPE OF REACTION?
CHEMICAL REACTION
ONE OF THE OBJECTIVES FOR A FF WHEN USING WATER AS A COOLING AGENT IS TOO DO WHAT?
COOL BURNING MATERIAL TO BELOW ITS FIRE OR FLASH POINT
THE FIRE POINT OF A SUBSTANCE IS USUALLY HOW MANY DEGREES HIGHER THEN ITS FLASH POINT?
FEW DEGREES HIGHER
WHAT TWO THNGS REFER TO TEMPERATURES WHERE COMBUSTIBLE GASES ARE BEGINNING TO ESCAPE FROM A SUBSTANCE?
FIRE POINT FLASH POINT
WHAT DO FIRE AND CHEMICAL COMMUNITIES SAY ABOUT FLASH POINT?
FLASH POINT DETERMINES THE FLAMMABILITY OF ALL LIQUIDS AND SOLIDS
WHATS THE DIFFERENCE BETWEEN FIRE POINT AND FLASH POINT?
FLASH POINT WONT CONTINUE TO BURN FIRE POINT WILL FLASH AND CONTINUE TO BURN
THE PROCESS OF INITIATING SELF SUSTAINED COMBUSTION?
IGNITION
AT WHAT TEMPERATURE IS THE COMBUSTION PROCESS SELF SUSTAINING?
IGNITION TEMPERATURE
WHAT ARE TWO WAYS A SUBSTANCE CAN REACH ITS IGNITION TEMPERATURE?
INTRODUCTION OF AN EXTERNAL IGNITION SOURCE TAKE A SMALL PORTION OF THE SUBSTANCE AND HEAT IT TO A PUT WHERE IT IGNITES ITSELF
A COLORLESS, ODERLESS TASTELESS GAS; NONFLAMMABLE; RENDERS ALL OTHER SUBSTANCES FLAMMABLE. THIS IS CALLED?
OXYGEN
WHAT HAS TO HAPPEN FOR COMBUSTION TO TAKE PLACE?
THE MOLECULES THAT MAKE UP THE SUBSTANCE MUST BE HEATED UP TO A CERTAIN TEMPERATURE
WHAT TWO THINGS MUST YOU HAVE TO ESTIMATE A SUBSTANCES FLASH POINT?
THE PRESSURE AND OXYGEN CONTENT OF THE ATMOSPHERE MUST BE CONSTANT THE SUBSTANCE MUST BE PURE
WHEN TESTING A SUBSTANCES FLASH POINT WHY DOES IT MERELY FLASH AND NOT CONTINUE TO BURN?
VAPORS ARE NOT BEING PRODUCES FAST ENOUGH TO SUPPORT CONTINUOUS COMBUSTION
WHEN ARE MOLECULES IN THE SUBSTANCE READY TO COMBINE WITH THE OXYGEN MOLECULES IN THE AIR?
WHEN IT REACHES ITS IGNITION TEMPERATURE
what is a flash point
a measure of volatility
whats the definition of an explosive range?
a mixture of flammable vapors and air, expressed as a percent, above or below which no ignition can occur
the physical property that refers to a mixture of of flammable vapors and air?
explosive range
whats also kown as flammable range or flammable limits?
explosive range
what is the rapid combustion of oxygen and fuel in a chemical reaction which liberates large amounts of heat and light which is visible as flame?
fire
the lowest temperature at which a substance begins to release ignitable vapors sufficiently fast enough to "flash" when exposed to an outside ignition source, but does not continue to burn. this is called?
flash point
it must be remembered that the determination of ignition temperatures is based on what?
laboratory tests
what must we have for a vapor to ignite?
proper ratio of air/fuel mixture
