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hazmat_chap13
hazmat_chap13
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1
Foam and water fog from hose streams are commonly used in: (513)
absorption and adsorption
vapor suppression
vapor dispersion
diverting liquid streams
2
Many flammable solids are metals that require a Class _____ fire extinguisher. (525)
C
D
B
A
3
Tarps, plastic sheeting, and foam are often used to perform: (507)
blanketing/covering
absorption
diking/damming
adsorption
4
Where is the emergency shutoff device located on corrosive liquid tanks (MC-312/DOT-412)? (501)
Right-front corner of the tank (behind the passenger)
These tanks typically do NOT have emergency shutoff devices
Left-front corner of the tank (behind the driver)
Either the right- or left-rear corner
5
Which foam application method is typically used on a pool of ignited or unignited liquid fuel on open ground? (522)
Roll-on
Rain-down
Bank-down
Back-splash
6
Long drainage times result in _____ foam blankets. (518)
watery
unexpanded
long-lasting
short-lived
7
If a hazardous solid material is on fire, remember that: (525)
you can look directly at the fire without any risks
you should use a Class A fire extinguisher
most flammable solids burn at very low temperatures
common firefighting materials (water, CO2) may increase the risk of damage
8
What may responders also need to do during product control operations according to SOPs? (505)
Fill out reports and supporting documentation
Make direct contact with the product
Stop the release before turning off the remote shutoff valve
Perform offensive leak control tactics
9
At a fixed facility or pipeline leak incident, responders should: (502)
overrule the facility and pipeline operators
immediately utilize the shutoff valves
only operate the shutoff valves with direction from facility operations
attempt to patch any leaks as soon as possible
10
Operations level responders take protective actions but do not attempt to stop the release unless: (504)
the task can be performed without the IC's knowledge
they have access to a Level A PPE ensemble
the task can be performed in under 10 minutes
they can close a remote shutoff valve from a safe location
11
What product is often used for controlling vapors of flammable and combustible liquid spills? (513)
Self-neutralizing and correcting foam (SNCF)
Dry chemical extinguishing agent
Class B foams
Class A foams
12
Where are emergency shutoff devices on cargo tank trucks usually located? (499)
Underneath the passenger seat
Behind the driver's side cab
Behind the front wheel on the driver's side
Beneath the cab on the passenger side
13
Which of the following is a high priority at flammable and combustible liquid spills? (513)
pH neutralization
Evidence collection
Vapor control
Environmental protection
14
What type of dam is most appropriate to build if the hazardous material has a density greater than one? (509)
Escapement
Overflow
Underflow
Diverting
15
When flames contact a tank shell above the liquid level and the tank shell itself has overheated: (523)
blanket the lower portion of the tank with foam
allow the fire to burn until all the fuel is consumed
use a fog nozzle to divert vapors
apply continual water to the upper portions of the tank
16
Confinement is another term for _____ control (503)
leak
suspect
fire
spill
17
Under safe & acceptable circumstances, Operations Level Responders may operate emergency remote shutoff devices on:(499)
cargo tank trucks and intermodal containers
radioactive and/or cryogenic cylinders
marine vessels and cargo ships
railway freight containers
18
the application rate of foam to control an unignited liquid spill is _ than that required to put out a spill fire(513)
substantially less
about the same
twice as much
slightly more
19
When using foam for vapor suppression, remember to: (517)
ensure that the material is above its boiling point
use water streams in conjunction with the application of foam
reapply aerated foam periodically until foam completely covers the spill
rely on the film that precedes the foam blanket
20
Some defensive spill-control tactics include diluting or changing its physical state of matter or hazard in order to(505
decrease the amount of material that needs disposal
reduce the amount of harm the material causes
minimize clean-up costs
ensure that responder decontamination is not needed
21
In which product control method do molecules of a liquid hazardous material physically adhere to the material? (506)
Adsorption
Absorption
Vapor suppression
pH neutralization
22
When working with flammable and combustible liquids, remember that: (498)
structural firefighters’ PPE can absorb flammable and combustible liquids
water is the most effective extinguishing agent on flammable liquids
flammable and combustible liquids are usually lighter than air
flammable liquids are typically heavier than water and will sink
23
Operation Level with Mission-Specific training is to select&perform product control to confine/contain the release:(497)
no matter what the risk
if there are no remote shutoff valves
while conducting rescue operations
with limited risk of personal exposure
24
If the products of combustion present fewer hazards than a leaking hazmat, the best course of action may be to:(520)
aggressively ventilate and/or disperse fumes and vapors
overpack the container as quickly as possible
protect exposures and let the fire burn until the fuel is consumed
blanket the leaking chemical with a thick covering of foam
25
dilution of a liquid rarely have applications at hazmat incidents for spill control, responders use dilution (511)
for leak control tactics
for evidence preservation techniques
for rescue and recovery
for decontamination operations
26
If a flammable leaking liquid is alcohol based, what type of product can be used to control its vapors? (516)
Aqueous film-forming foam (AFFF)
Foam that has been mixed without water
An alcohol-resistant foam agent
Regular fluoroprotein foam
27
Responders usually use dispersion agents on _____ spills. (511)
contained
small
organophosphate
hydrocarbon
28
What is the goal of the product control method of neutralization? (512)
Minimize the amount of harm the product can cause upon contact
Dispose of the product safely
Contain the product in a small area
Disperse the product over a large area to minimize potency
29
When choosing an absorbent, remember that: (506)
it must be chemically compatible with the material being absorbed
they are commonly used on very large spills
they are easy to dispose of because they are usually common materials
absorbents tend to shrink as they absorb the material
30
A defensive leak control action that Operations Level Responders can take is to: (499)
raise or lower the pH of corrosive materials to render them neutral
activate shutoff valves at fixed facilities or pipelines
lead rescue and recovery operations
initiate damming, diking, or diversion activities
31
Spill control tactics are generally _____ at the Operations Level. (503)
dual
offensive
restorative
defensive
32
Directing or diverting a spilled hazardous liquid to a remote location for collection is a method of: (503)
risk-based analysis
defensive spill control
offensive leak control
remote shutoff
33
Where will you find the emergency shutoff device for high pressure tanks (MC-331)? (499)
In the center of the tank near the valves and piping
Left-front corner of the tank (behind the driver)
On the dashboard next to the reverse camera
These tanks do NOT have emergency shutoff valves
34
What is another term for leak control? (498)
Confinement
Containment
Extinguishment
Reduction
35
In which situation would you most likely use the bank-down or backsplash method? (522)
A fire without an object from which to bank foam
A very large spill of flammable or combustible liquid
A pool of ignited or unignited liquid fuel on open ground
Fires contained in diked pools around storage tanks
36
application method directs the stream into the air above the fire or spill and the foam floats down onto the fuel
Bank-down
Rain-down
Roll-on
Back-splash
37
Which method is usually more effective for removing atmospheric contaminants? (519)
Blanketing/Covering
Negative-pressure ventilation
Positive-pressure ventilation
Absorption/Adsorption
38
What is a defensive spill-control tactic to dilute the concentration of a gaseous hazard? (512)
Dam/Dike/Retain
Vapor dispersion
Blanketing/Covering
Adsorption or Absorption
39
What type of nozzle is best used for vapor suppression with a foam agent? (518)
Smooth bore
Water fog
Air-aspirating
Fixed gallonage
40
Who performs most offensive leak-control tactics? (498)
Hazardous materials technicians and specialists
Operations Level Responders
Awareness Level Personnel
Back-up team specialists
41
In order for vapor dispersion with water spray to work: (512)
the material must be water soluble or the vapor cloud must be moveable
the hazardous material must absorbed or adsorbed
a dike or dam must be already set up
the vaporous materials must be lighter than air
42
If a dry chemical system has discharged into a confined space, no one should enter the space without SCBA until: (525)
all the chemical extinguishing agents have discharged
the space is thoroughly ventilated
victims have been decontaminated
the surrounding area has been evacuated
43
an incident with a flammable hazardous liquid fire, when do you extinguish fires burning around relief valves or piping?
Once the IAP is written
After the leak is controlled
As soon as possible
Upon arrival
44
At a hazmat incident, fire control tactics not only include extinguishing burning hazardous materials but also: (519)
raising or lowering the pH of a flammable material
preventing ignition of flammable materials
confining a hazardous material to its container
limiting the escape of a hazardous material
45
Flammable and combustible liquids are typically lighter than water and, if so, will: (498)
require a 1-mile (1.6 km) exclusion zone
be extinguished by water
float on water
be extinguished by water
46
Which is a responsibility of Operations Level Responders with Mission-Specific product control training? (497)
Research appropriate PPE for a variety of hazmat response scenarios
Develop new product control techniques
Perform offensive product control tasks that require tech. level training
Work under the guidance of a hazmat tech, an allied professional
47
increasing intensity of sounds or fire from relief valves of a container containing a flammable gas indicates that:(524)
pressure within the container is decreasing and the incident is resolving
you should attempt to dilute the product using flooding amounts of water
you should blanket the valves using copious amounts of foam
pressure in the container is increasing and container failure is imminent
48
Damming, diking, and diverting are generally methods to contain the spread of _____ materials. (508)
gaseous
solid
plasma
liquid
