Chapter 4: Identifying potential hazards Flashcards

1
Q

Matter is found and what three states?

A

Gas, liquid,solid

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2
Q

The ERG establishes separate initial isolation distance is based solely on the involve products state of matter

A

Solid- 75 feet
Liquid- 150 feet
Gases- 330 feet

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3
Q

The Least mobile of the three states of matter

A

Solids

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4
Q

Unit of measure typically use to express particle size

A

Micron

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5
Q

Physical properties

A

The characteristics of a material that do not involve the chemistry or chemical nature of the material

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6
Q

Vapor pressure

A

The pressure exerted by a saturated vapor above its own liquid in a closed container

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7
Q

Boiling point

A

The temperature at which a liquid changes to a gas at a given pressure.

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8
Q

BLEVE

A

Boiling liquid expanding vapor explosion

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9
Q

When can BLEVEs occur

A

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)

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10
Q

A vapor density less than one indicates?

A

A vapor lighter than air

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11
Q

A vapor density greater than one indicates what?

A

A vapor heavier than air

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12
Q

Miscibility

A

Describes the ability of two or more gases or liquids to mix with or to dissolve into each other

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13
Q

A specific gravity less than one indicates what?

A

A substance lighter than water (float)

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14
Q

A specific gravity greater than one indicates what?

A

A substance heavier than water (sink)

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15
Q

Persistence

A

A chemical’s ability to remain in the environment

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16
Q

Viscosity

A

Measure of a liquid’s internal friction at a given temperature

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17
Q

Flashpoint

A

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

18
Q

Fire point

A

The temperature at which a liquid or volatile substance gives off enough vapors to support continuous burning

19
Q

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.

A

Autoignition Temperature

20
Q

This temperature, also known as the___________, is the point at which of you spontaneously ignites.

A

Ignition temperature

21
Q

(LEL) Lower explosive limit or

(LFL) Lower flammable limit

A

Lower limit at which a flammable gas or vapor will ignite and support combustion

22
Q

Below this limit the gas with vapor is to Lean or Thin to burn

A

(LEL) Lower explosive limit or

(LFL) Lower flammable limit

23
Q

(UFL) Upper flammable limit or

(UEL) Upper explosive limit

A

Upper limit at which a flammable gas or vapor will ignite

24
Q

Above this limit the gas or vapor is too rich to burn lacks the proper quantity of oxygen

A

(UFL) Upper flammable limit or

(UEL) Upper explosive limit

25
The corrosivity of acids and bases is often measured or expressed in terms of?
pH
26
Any chemical that ionizes (dissociates) to yield Hydrogen ions (hydronium) in water.
Acid
27
Acids have PH values of?
0 to 6.9
28
Base (alkalis)have a pH value of?
7.1 to 14
29
The chemical____________ of a substance describes its related ability to undergo a chemical reaction with itself or other materials.
Reactivity
30
Commonly react vigorously or violently with air, water, heat, light each other or other materials.
Reactive materials
31
Minimum energy that start a chemical reaction
Activation energy
32
Substance that readily gives off large quantities of oxygen thereby stimulating combustion
Strong oxidizer
33
The ________In the fire tetrahedron acts as a fuel source for the reaction
Reducing agent
34
Reducing agent
Fuel that is being oxidized or burn during combustion also known as reducer
35
____________ are materials that encourage a strong reaction( by readily excepted electrons) from reducing agents (fuel)
Strong oxidizers
36
What are the four types of ionizing radiation
Alpha Beta Gamma neutron
37
Particles that have a physical mass but have no electrical charge. (Highly penetrative)
Neutron
38
Colorless odorless dangerous gas both toxic and flammable form by the incomplete combustion of carbon
Carbon monoxide (CO)
39
Colorless, toxic and flammable liquid until it reaches 79°FAbove the temperature it becomes a gas with the faint odor similar to bitter almonds
Hydrogen cyanide (HCN)
40
Colorless odorless heavier than air gas that neither supports combustion nor burnsUsing portable fire extinguishers as an extinguishing agent to extinguish class B or C fires
(CO2)
41
Two materials that do not readily dissolve into each other are considered?
Immiscible