Ch. 7: Hazard Assessment and Risk Evaluation Flashcards Preview

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Flashcards in Ch. 7: Hazard Assessment and Risk Evaluation Deck (55)
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What is the most critical decision-making point in the successful management of a hazardous materials incident?

The evaluation of hazard information and the assessment of risks.

1

What is recognized as a critical benchmark in safe and successful emergency response operations?

The concept of hazard assessment and risk evaluation.

2

What refer to a danger or peril?

hazards

3

What refer to the probability of suffering harm or loss?

risks

4

What are the three distinct, but inter-related tasks of the hazard and risk evaluation process?

1) Hazard Assessment
2) Risk Evaluation
3) Development of the IAP

5

What must responders understand to mount a safe and effective hazmat response?

1) how the enemy will behave
2) how it can harm
3) how these properties are influenced by the environment where the incident is occuring

6

What provide information on the behavior of a material?

physical properties

7

What is known as the pressure exerted by the vapor within the container against the sides of the container?

vapor pressure

8

The weight of a solid or liquid material as compared with the weight of an equal volume of water.

specific gravity

9

The weight of a pure vapor or gas compared with the weight of an equal volume of dry air at the same temperature and pressure.

vapor density

10

The temperature at which a liquid changes its phase to a vapor or gas.

boiling point

11

The temperature at which a solid changes its phase to a liquid.

melting point

12

The ability of a substance to change from the solid to the vapor phase without passing through the liquid phase.

sublimation

13

The temperature above which a gas cannot be liquefied no matter how much pressure is applied.

critical temperature

14

The pressure that must be applied to liquefy a gas at its critical temperature.

critical pressure

15

The rapid release of a liquefied gas that causes it to rapidly cool, slow down the boiling process, and remain in a liquid state.

auto-refrigeration

16

The ease with which a liquid or solid can pass into the vapor state.

volatility

17

The rate at which a material will vaporize or change from liquid to vapor.

evaporation rate

18

The amount of gas produced by the evaporation of one volume of liquid at a given temperature.

expansion ratio

19

The ability of a solid, liquid, gas or vapor to dissolve in water or other specified medium.

solubility

20

The ability of materials to dissolve into a uniform mixture.

miscibility

21

Measurement of the thickness of a liquid and its ability to flow.

viscosity

22

What are the intrinsic characteristics or properties of a substance described by its tendency to undergo chemical change?

chemical properties

23

What typically provides responders with an understanding of how a material may harm?

chemical properties

24

Concentration of material to which the body is exposed over a specific time period.

dose

25

Minimum temperature at which a liquid gives off sufficient vapors that will ignite and flash over, but will not continue to burn without the addition of more heat.

flash point

26

Minimum temperature at which a liquid gives off sufficient vapors that will ignite and sustain combustion.

fire point

27

The minimum temperature required to ignite gas or vapor without a spark or flame being present.

ignition temperature

28

The range of gas or vapor concentration that will burn or explode if an ignition source is present.

flammable range

29

The byproducts of the combustion process that are harmful to humans.

toxic products of combustion