Evfd Ifsta Hazmat Operations Ch 13

Front 1

What is the purpose of vapor dispersion at a hazmat incident?

Back 1

direct or influence the course of vapors

Front 2

When using water streams to disperse gas being released under pressure, the mass and velocity of the water streams must:

Back 2

exceed the mass and velocity of teh escaping gas

Front 3

Neutralization aims to raise or lower the pH of corosive materials to a pH of:

Back 3

7

Front 4

At an incident involving a break in an underground pipe, personnel should anticipate:

Back 4

a potential explosion and accompanying fire

Front 5

For vapor suppression at a hazmat incident, what type of nozzle should first responders use?

Back 5

Air-aspirating

Front 6

Spill-control tactics:

Back 6

confine a hazardous material that has been released from its container

Front 7

In what method of spill control does the liquid hazardous material physically adhere to the confinement material?

Back 7

adsorption

Front 8

Some spill-control tactics attempt to confine the hazardous material, while others attempt to __________ the material

Back 8

dilute

Front 9

Where would you find the emergency shutoff device on a corrosive liquid tank (MC/DOT 312)?

Back 9

They typically do NOT have emergency shutoff devices

Front 10

Damming, diking, and diversion are methods of:

Back 10

spill control

Front 11

Blanketing/covering is often used to contain soldis such as powders and dusts, but can also be used as a temporary option for biological substances and:

Back 11

alpha radiation

Front 12

What should you look for on an intermodal container to help locate the emergenc shutoff device?

Back 12

Metal cable running down one side of the frame rail

Front 13

After an incident where you build a dike or dam to contain a spill, what must you do with used construction materials that contacted the hazardous material?

Back 13

Properly dispose of them

Front 14

What should you do if there are NOT adequate resources to control a fire at a hazmat incident?

Back 14

consider withdrawl

Front 15

An advantage to using a shutoff valve at a pipeline incident is that:

Back 15

you may be able to stop the flow without entering teh hot zone

Front 16

Why should you NOT use water stream in conjunction with foam?

Back 16

water destroy and washes away foam blankets

Front 17

Dilution is the applicaiton of __________ to a hazardous material to reduce the hazard.

Back 17

water

Front 18

Flammable and combustible liquids are typically heavier than air and:

Back 18

lighter than water

Front 19

What hazardous material is involved in the majority of hazmat incidents?

Back 19

flammable and combustible liquids

Front 20

If a BLEVE seems likely, a good tactic is to:

Back 20

apply water to the upper portions of the tank, using unattended water streams

Front 21

What is a disadvantage of using dispersion techniques at a hazmat incident?

Back 21

the hazardous material may be spread over a wider area

Front 22

At an incident where excavation equipment has broken through underground pipes and caused a natural gas leak, you should immediately:

Back 22

contact the utility company

Front 23

leak control is often referred to as:

Back 23

containment

Front 24

What is the purpose of vapor suppression at a hazmat incident?

Back 24

reduce the emission of vapors

Front 25

Spill control is also referred to as:

Back 25

confinement

Front 26

The use of positive pressure ventilation at a hazmat incident:

Back 26

removes atmospheric contaminants more effectively than negative pressure ventilation

Front 27

An increase in the intensity of sound or fire issuing from a pressure relief device may indicate that:

Back 27

the container is overheating and rupture is imminent

Front 28

Which type of foam is used to extinguish flammable and combustible liquids?

Back 28

Class B

Front 29

If the material on fre is above its boiling point:

Back 29

do NOT use foam

Front 30

Operations Level responders may perform leak control by:

Back 30

actiating emergency shutoff devices on transportaion containers

Front 31

When choosing an absorbent, you must make sure that:

Back 31

it is compatble with the material being absorbed

Front 32

Control

Back 32

to contain, confine, neutralize, or extinguish a hazardous material or its vapor

Front 33

Confinement

Back 33

the prosess of controlling the flow o fa spill and capturing it at some specified location

Front 34

Neutralization

Back 34

Chemical reaction in water in which an acid and base react quantitatively with each other until there are no excess hydroen or hydroxide ions remaining in the solution

Front 35

Dam

Back 35

actions to prevent or limit the flow of a liquid or sludge past a certain point

Front 36

Dike

Back 36

actions using raised embankments or other barriers to prevent movement of liquids or sludges to another area

Front 37

Divert

Back 37

actions to direct and control movement of a liquid or sludge to an area that will produce less harm

Front 38

Retain

Back 38

Actions to contain a liquid or sludge in an area where it can be absorbed, neutralized, or removed. Often used as a longer-term solution than other similar product control methods

Front 39

Vapor Suppression

Back 39

Action taken to reduce the emission of vapors at a hazardous materials spill

Front 40

Vapor Dispersion

Back 40

Action taken to direct or influence the course of airborne hazardous materials

Front 41

Ventilation

Back 41

Systematic removal of heated air, smoke, gases, or other airborne contaminants from a structure and replacing them with cooler and/or fresher air to reduce damage and facilitate fire fighting operations

Front 42

Intrinsically Safe

Back 42

Describes equipment that is approved for use in flammable atmospheres, must be incapable of releasing enough electrical energy to ignite the flammable atmosphere

Front 43

Dilution

Back 43

Application of water to a water-soluble material to reduce the hazard

Front 44

Containment

Back 44

the act of stoping the further release of a material from its container

Front 45

Extinguish

Back 45

to put out a fire completely

Front 46

Class B Foam Concentrate

Back 46

Foam fire-suppression agent designed to use on ignited or unignited Class B flammable or combustible liquids

Front 47

Aqueous Film Forming Foam (AFFF)

Back 47

Synthetic foam concentrate that when combined with water, can form a complete vapor barrier over fuel spills and fires and is a highly effective extinguishing and blanketing agent on hydrocarbon fuels

Front 48

Drainage Time

Back 48

Amount of time it takes foam to break down or dissolve

Front 49

Expansion Ratio

Back 49

1) Volume of a substance in liquid form compared to the volume of teh same number of molecules of that substance in gaseous form (2) Ratio of the finished foam volume to the volume of the original foam solution

Front 50

Roll-On Application Method

Back 50

Method of Foam application in which the foam stream is directed at the ground at the front edge of teh unignited or ignited liquid fuel spill

Front 51

Bank-Down Application Method

Back 51

Method of foam application that may be employed on an ignited or unignited class B fuel spill. The foam stream is directed at a vertical surface or object that is next to or within the spill area; foam deflects off the surface or object and flows down onto the surface of the spill to form a foam blanket

Front 52

Rain-Down Application Method

Back 52

Foam applicaiton method that directs the stream into the air above the unignited or ignited spill or fire, allowing the foam to float gently down onto the surface of the fuel

Front 53

Air-Aspirating Foam Nozzle

Back 53

Foam nozzle designed to provide the aeration required to make the highest quality foam possible, most effetive appliance for teh generation of low expansion foam