Chapter 4: Identifying potential hazards Flashcards
Matter is found and what three states?
Gas, liquid,solid
The ERG establishes separate initial isolation distance is based solely on the involve products state of matter
Solid- 75 feet
Liquid- 150 feet
Gases- 330 feet
The Least mobile of the three states of matter
Solids
Unit of measure typically use to express particle size
Micron
Physical properties
The characteristics of a material that do not involve the chemistry or chemical nature of the material
Vapor pressure
The pressure exerted by a saturated vapor above its own liquid in a closed container
Boiling point
The temperature at which a liquid changes to a gas at a given pressure.
BLEVE
Boiling liquid expanding vapor explosion
When can BLEVEs occur
They can occur when a liquid within a container is heated, causing the material inside to boil or vaporize.(such as in the case of a liquefied petroleum gas tank exposed to a fire)
A vapor density less than one indicates?
A vapor lighter than air
A vapor density greater than one indicates what?
A vapor heavier than air
Miscibility
Describes the ability of two or more gases or liquids to mix with or to dissolve into each other
A specific gravity less than one indicates what?
A substance lighter than water (float)
A specific gravity greater than one indicates what?
A substance heavier than water (sink)
Persistence
A chemical’s ability to remain in the environment
Viscosity
Measure of a liquid’s internal friction at a given temperature
Flashpoint
The minimum temperature at which a liquid or a volatile solid gives off sufficient vapors at its lowest explosive limit to form in ignitable mixture with air
Fire point
The temperature at which a liquid or volatile substance gives off enough vapors to support continuous burning
The________ temperature of a Substance is the minimum temperature to which the fuel in air must be heated to initiate self sustain combustion without Initiation from an independent ignition source.
Autoignition Temperature
This temperature, also known as the___________, is the point at which of you spontaneously ignites.
Ignition temperature
(LEL) Lower explosive limit or
(LFL) Lower flammable limit
Lower limit at which a flammable gas or vapor will ignite and support combustion
Below this limit the gas with vapor is to Lean or Thin to burn
(LEL) Lower explosive limit or
(LFL) Lower flammable limit
(UFL) Upper flammable limit or
(UEL) Upper explosive limit
Upper limit at which a flammable gas or vapor will ignite
Above this limit the gas or vapor is too rich to burn lacks the proper quantity of oxygen
(UFL) Upper flammable limit or
(UEL) Upper explosive limit