Chapter 4: Identifying potential hazards

Question 1

Matter is found and what three states?

Answer 1

Gas, liquid,solid

Question 2

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

Answer 2

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

Question 3

The Least mobile of the three states of matter

Answer 3

Solids

Question 4

Unit of measure typically use to express particle size

Answer 4

Micron

Question 5

Physical properties

Answer 5

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

Question 6

Vapor pressure

Answer 6

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

Question 7

Boiling point

Answer 7

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

Question 8

BLEVE

Answer 8

Boiling liquid expanding vapor explosion

Question 9

When can BLEVEs occur

Answer 9

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)

Question 10

A vapor density less than one indicates?

Answer 10

A vapor lighter than air

Question 11

A vapor density greater than one indicates what?

Answer 11

A vapor heavier than air

Question 12

Miscibility

Answer 12

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

Question 13

A specific gravity less than one indicates what?

Answer 13

A substance lighter than water (float)

Question 14

A specific gravity greater than one indicates what?

Answer 14

A substance heavier than water (sink)

Question 15

Persistence

Answer 15

A chemical’s ability to remain in the environment

Question 16

Viscosity

Answer 16

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

Question 17

Flashpoint

Answer 17

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

Question 18

Fire point

Answer 18

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

Question 19

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.

Answer 19

Autoignition Temperature

Question 20

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

Answer 20

Ignition temperature

Question 21

(LEL) Lower explosive limit or

(LFL) Lower flammable limit

Answer 21

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

Question 22

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

Answer 22

(LEL) Lower explosive limit or

(LFL) Lower flammable limit

Question 23

(UFL) Upper flammable limit or

(UEL) Upper explosive limit

Answer 23

Upper limit at which a flammable gas or vapor will ignite

Question 24

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

Answer 24

(UFL) Upper flammable limit or

(UEL) Upper explosive limit

Question 25

The corrosivity of acids and bases is often measured or expressed in terms of?

Answer 25

pH

Question 26

Any chemical that ionizes (dissociates) to yield Hydrogen ions (hydronium) in water.

Answer 26

Acid

Question 27

Acids have PH values of?

Answer 27

0 to 6.9

Question 28

Base (alkalis)have a pH value of?

Answer 28

7.1 to 14

Question 29

The chemical____________ of a substance describes its related ability to undergo a chemical reaction with itself or other materials.

Answer 29

Reactivity

Question 30

Commonly react vigorously or violently with air, water, heat, light each other or other materials.

Answer 30

Reactive materials

Question 31

Minimum energy that start a chemical reaction

Answer 31

Activation energy

Question 32

Substance that readily gives off large quantities of oxygen thereby stimulating combustion

Answer 32

Strong oxidizer

Question 33

The ________In the fire tetrahedron acts as a fuel source for the reaction

Answer 33

Reducing agent

Question 34

Reducing agent

Answer 34

Fuel that is being oxidized or burn during combustion also known as reducer

Question 35

____________ are materials that encourage a strong reaction( by readily excepted electrons) from reducing agents (fuel)

Answer 35

Strong oxidizers

Question 36

What are the four types of ionizing radiation

Answer 36

Alpha
Beta
Gamma
neutron

Question 37

Particles that have a physical mass but have no electrical charge. (Highly penetrative)

Answer 37

Neutron

Question 38

Colorless odorless dangerous gas both toxic and flammable form by the incomplete combustion of carbon

Answer 38

Carbon monoxide (CO)

Question 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

Answer 39

Hydrogen cyanide (HCN)

Question 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

Answer 40

(CO2)

Question 41

Two materials that do not readily dissolve into each other are considered?

Answer 41

Immiscible