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FIRE 207 Chap 13
Terms in this set (32)
Spill control tactics attempt to
reduce the amount of contact the product makes with people, property, and the environment.
Why should ICs consult technical sources before using equipment to confine spilled materials?
To determine if the spilled material will adversely affect the equipment
A defensive spill-control tactic that confines a hazardous material, rather than changing its physical and/or chemical properties, is
Neutralization and vapor dispersion are:
defensive spill-control tactics aimed at reducing the amount of harm a material causes.
Why must responders treat and dispose of absorbents as hazardous materials?
Absorbents retain the properties of the materials they absorb.
During the process of adsorption, the molecules of the liquid hazardous material
physically adhere to the adsorbent material rather than being absorbed into its inner spaces.
Responders usually use organic-based materials, such as activated charcoal or carbon, as:
Which process might be used for the temporary mitigation of radioactive and biological substances?
Diking, damming, diverting, and retention:
control the flow of liquid hazardous materials away from the point of discharge.
To reduce the emission of vapors at a hazmat incident, responders should use:
What must responders do after using water streams for vapor dispersion?
Confine and analyze runoff water for possible contamination
When choosing the type of ventilation to use, remember that:
positive-pressure ventilation removes atmospheric contaminants more effectively than negative-pressure ventilation.
One problem associated with dispersion is that it can:
spread a hazardous material over a wide area.
Which action rarely has practical applications at hazmat incidents in terms of spill control?
Responders use dilution more frequently when dealing with:
Which method of spill control involves raising or lowering the pH of corrosive materials?
Provided they have appropriate training, equipment, and PPE, Operations level responders can take offensive actions, like leak control, in situations involving:
gasoline and natural gas fuels.
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
Which type of cargo tank truck does NOT typically have emergency shutoff devices?
Corrosive liquid tanks
At a fixed facility or at a pipeline, responders should NOT shut any valves without direction from:
facility or pipeline operators.
If the products of combustion present fewer hazards than the leaking chemical, the best course of action may be to:
protect exposure and let a fire burn until the fuel is consumed.
When might withdrawal be the safest tactical option for responders?
When there is potential for a BLEVE or other explosion
Why should responders avoid contact with flammable or combustible products?
Protective clothing can absorb these products and ignite if exposed to an ignition source.
What is true of Class B foam concentrates?
Foam concentrates that are intended for polar solvents can be used on hydrocarbon fires.
In general, the application rate to control an unignited liquid spill is _____ than that required to extinguish a spill fire.
Why should responders use air-aspirating nozzles rather than water fog nozzles for vapor suppression?
Aerated foam maintains the vapor suppressive blanket longer.
Foam cannot seal vapors of:
The most common cause of a BLEVE is when:
flames contact the tank shell above the liquid level and the tank shell itself has overheated.
How can water be used in flammable and combustible liquid fire control?
It can be used as a cooling agent.
When using water streams to disperse gas being released under pressure, the ______ of the water streams must exceed that of the escaping gas.
mass and velocity
What may indicate that the pressure within a container is increasing and that container failure may be imminent?
An increase in the intensity of sounds or fire issuing from a relief valve
At an incident involving a break in an underground pipe, personnel should first evacuate the area immediately around the break and the area:
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