Hazmat Awareness - Operations | Chapter 13

1. Diking, damming, diverting, and retention:

reduce the emission of vapors at a hazmat incident.

control air movement using natural or mechanical means.

reduce the potential risks of liquid hazardous materials by dilution.

control the flow of liquid hazardous materials away from the point of discharge.

2. A defensive spill-control tactic that confines a hazardous material, rather than changing its physical and/or chemical properties, is:

ventilation.

dissolution.

absorption.

neutralization.

3. Why should I Cs consult technical sources before using equipment to confine spilled materials?

To determine how to correctly use a piece of equipment

To determine if a similar situation bas occurred in the past

To determine if the spilled material will adversely affect the equipment

To determine if the spilled material is able to be contained by the equipment

4. Neutralization and vapor dispersion are:

offensive spill-control tactics aimed at stopping the release of a hazardous material.

defensive spill-control tactics aimed at confining spilled hazardous materials.

offensive spill-control tactics aimed at confining spilled hazardous materials.

defensive spill-control tactics aimed at reducing the amount of harm a material causes.

5. Which process might be used for the temporary mitigation of radioactive and biological substances?

Dilution

Absorption

Adsorption

Blanketing/covering

6. How can water be used in flammable and combustible liquid fire control?

It can be used as a cooling agent.

It can be used as an extinguishing agent.

It can be used for dilution of toxic materials.

It can only be used for hydration of responders.

7. Why should responders avoid contact with flammable or combustible products?

Protective clothing may not be able to withstand the effects of these products.

Protective clothing can ignite puddles, streams, or contaminated pools of these products.

Protective clothing may not be able to withstand the corrosive effects of these products.

Protective clothing can absorb these products and ignite if exposed to an ignition source.

8. During the process of adsorption, the molecules of the liquid hazardous material:

physically adhere to the adsorbent material rather than being adsorbed into its inner spaces.

chemically adhere to the adsorbent material rather than being absorbed into its inner spaces.

chemically adhere to the absorbent material rather than being adsorbed into its inner spaces.

physically adhere to the absorbent material rather than being adsorbed into its inner spaces.

9. Provided they have appropriate training, equipment, and PPE, Operations Level responders can take offensive actions, like leak control, in situations involving:

chlorine.

anhydrous ammonia.

radioactive materials.

gasoline and natural gas fuels.

10. At a fixed facility or at a pipeline, responders should NOT shut any valves without direction from:

law enforcement.

federal authorities.

the owner of the facility.

facility or pipeline operators.

11. At an incident involving a break in an underground pipe, personnel should first evacuate the area immediately around the break and the area:

upwind.

to the left.

downwind.

to the right.

12. When choosing the type of ventilation to use, remember that:

zero-pressure ventilation removes atmospheric contaminants more effectively than positive-pressure ventilation.

neutral-pressure ventilation removes atmospheric contaminants more effectively than positive-pressure ventilation.

positive-pressure ventilation removes atmospheric contaminants more effectively than negative-pressure ventilation.

negative-pressure ventilation removes atmospheric contaminants more effectively than positive-pressure ventilation.

13. What may indicate that the pressure within a container is increasing and that container failure may be imminent?

A decrease in the intensity of sounds

A decrease in the temperature of the container's shell

An increase in the intensity of sounds or fire issuing from a relief valve

A decrease in the temperature of the container and failure of the emergency shutoff device

14. Responders usually use organic-based materials, such as activated charcoal or carbon, as:

adsorbents.

absorbents.

neutralizers.

vapor suppressants.

15. One problem associated with dispersion is that it can:

only control small, shallow Liquid spills.

spread a hazardous material over a wide area.

only be accomplished by creating a foam blanket.

not be used on hydrocarbon spills such as oceanic crude oil.

16. Foam cannot seal vapors of:

boiling liquids.

cryogenic liquids.

pressurized liquids.

alcohol-type liquids.

17. Spill control tactics attempt to:

spill hazardous materials in a carefully controlled manner.

remediate spilled hazardous materials from contaminated exposures.

contain the product in its original container (or another) and prevent it from escaping.

reduce the amount of contact the product makes with people, property, and the environment.

18. The most common cause of a BLEVE is when:

flames from inside the container cause the tank shell and the liquid to overheat.

flames surround the tank shell and the shell itself and the liquid become overheated.

flames contact the tank shell above the liquid level and the tank shell itself has overheated.

flames contact the tank shell below the liquid level and the liquid itself has overheated.

19. To stop or limit the escape or to contain the release of a product either in its original container or by transferring it to a new one is the goal of:

fire control.

spill control.

leak control.

dilution control.

20. If the products of combustion present fewer hazards than the leaking chemical, the best course of action may be to:

attempt to extinguish the fire immediately.

dilute the chemical by applying copious amounts of water.

contain the release of the chemical in its original container.

protect exposure and let a fire bum until the fuel is consumed.

Hazmat Awareness - Operations

Chapter 13

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