FIRE 3303 : What Do You Know About Fire Prevention? Trivia Questions Quiz
Below is a Fire 3303 trivia quiz to help you see What You Know about Fire Prevention? There are different ways in which you can ensure you are safe in case of a fire starting up around you, but before you get to that point, you should ensure that you take up all measures to prevent the event from occurring. Do give it a shot!
- 1.
How does a spill boom control a hazardous material?
- A.
It forms a barrier to the movement of the material.
- B.
It absorbs the material.
- C.
It covers the material.
- D.
It reduces agitation of liquid within the boom perimeter.
Correct Answer
A. It forms a barrier to the movement of the material.Explanation
A spill boom controls a hazardous material by forming a barrier to its movement. This barrier prevents the material from spreading further and contains it within a defined area. By creating a physical barrier, the spill boom helps to limit the potential damage and contamination caused by the hazardous material. It effectively restricts the material's movement and allows for proper containment and cleanup procedures to be implemented.Rate this question:
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- 2.
What type of dam should be constructed for a material that has a specific gravity greater than 1?
- A.
Gravity
- B.
Scherring
- C.
Separation
- D.
Overflow
Correct Answer
D. OverflowExplanation
An overflow dam should be constructed for a material that has a specific gravity greater than 1. This is because an overflow dam allows excess water or material to flow over the top, preventing the dam from being overwhelmed or damaged. By allowing the excess material to overflow, the dam can effectively manage the higher specific gravity of the material and prevent any potential structural issues.Rate this question:
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- 3.
Which item will be needed to build a dam in a flowing stream that is contaminated with a hazardous liquid?
- A.
PVC pipe
- B.
Rebar
- C.
Plastic sheeting
- D.
Rip-rap
Correct Answer
A. PVC pipeExplanation
PVC pipe is the correct answer because it is a durable and corrosion-resistant material that can withstand the flow of a contaminated liquid. It can be used to construct the necessary infrastructure for diverting or controlling the flow of the stream during the dam construction process. PVC pipe is commonly used in various construction projects due to its versatility and ability to handle hazardous substances.Rate this question:
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- 4.
A firefighter is directing a foam stream over an aboveground open-top storage tank, letting the foam gently fall onto the surface of the liquid in the tank. Which foam application method does this describe?
- A.
Bounce-off method
- B.
Aerial method
- C.
Roll-in method
- D.
Rain-down method
Correct Answer
D. Rain-down methodExplanation
The rain-down method is the correct answer because it involves directing the foam stream over the storage tank and allowing the foam to gently fall onto the liquid surface. This method is often used when dealing with aboveground open-top storage tanks, as it helps to create a blanket of foam that covers the liquid and suppresses the fire.Rate this question:
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- 5.
Which of the following is a concern with using dilution at a hazardous materials spill?
- A.
Once water is added, it cannot be removed.
- B.
Chemical treatments may not be effective on diluted solution of the product.
- C.
Once water is added, the identity of the hazardous material may be masked.
- D.
The diluted product may overwhelm containment measures.
Correct Answer
D. The diluted product may overwhelm containment measures.Explanation
When a hazardous material spill occurs, containment measures are put in place to prevent the spread of the material and minimize the risk to people and the environment. However, if the spilled material is diluted, it may become more difficult to contain. The diluted product may seep through or overwhelm the containment measures, leading to further contamination and increasing the potential hazards. Therefore, this is a concern with using dilution at a hazardous materials spill.Rate this question:
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- 6.
Which of the following is an identifying characteristic of a cargo tank truck designed to carry liquids at atmospheric pressure?
- A.
Top-mounted loading control valves
- B.
Oval/elliptical cross-sectional tank shape
- C.
External ring stiffeners
- D.
Circumferential rollover protection
Correct Answer
B. Oval/elliptical cross-sectional tank shapeExplanation
The identifying characteristic of a cargo tank truck designed to carry liquids at atmospheric pressure is the oval/elliptical cross-sectional tank shape. This shape allows for better stability and distribution of the liquid cargo during transportation. It also helps to minimize sloshing and shifting of the cargo, reducing the risk of accidents or spills.Rate this question:
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- 7.
Which issue requires particular attention when considering attempting dispersal of flammable vapors?
- A.
Personnel may be directly exposed to the material.
- B.
Water fog will react to many flammable liquids.
- C.
Dispersal may cause the vapors to ignite.
- D.
Turbulence created by the dispersal may increase vapor production.
Correct Answer
C. Dispersal may cause the vapors to ignite.Explanation
When considering attempting dispersal of flammable vapors, one issue that requires particular attention is the possibility of the vapors igniting. Dispersing the vapors can create a situation where the concentration of the vapors becomes more flammable, increasing the risk of ignition. This can be dangerous for personnel who may be directly exposed to the material, as well as for the surrounding environment. Therefore, it is important to carefully assess the potential risks and take appropriate precautions before attempting to disperse flammable vapors.Rate this question:
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- 8.
What is the technique of redirecting the flow of a liquid away from an area?
- A.
Diversion
- B.
Diking
- C.
Detainment
- D.
Damming
Correct Answer
A. DiversionExplanation
Diversion is the technique of redirecting the flow of a liquid away from an area. This can be done by creating channels or barriers to divert the liquid to a different path or location. It is commonly used in situations such as redirecting floodwaters or rerouting sewage systems. Diking refers to the construction of embankments or dikes to hold back water, while detainment involves the temporary storage of liquids. Damming, on the other hand, refers to the construction of a barrier to hold back water and create a reservoir.Rate this question:
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- 9.
Which foam application method is the least effective when burning fuel is producing a strong thermal column?
- A.
Rain-down method
- B.
Bounce-off method
- C.
Subsurface injection method
- D.
Roll-in method
Correct Answer
A. Rain-down methodExplanation
The rain-down method is the least effective when burning fuel is producing a strong thermal column because it involves dropping foam from above onto the fire. In a strong thermal column, the heat and updrafts can cause the foam to disperse before it reaches the fire, reducing its effectiveness in extinguishing the flames. This method is more suitable for smaller fires or when the thermal column is not as intense.Rate this question:
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- 10.
Which statement about fluoro protein foam is correct?
- A.
It has poor vapor-suppressing performance.
- B.
It is effective on Class B fires.
- C.
It is effective as a Class A wetting agent.
- D.
It is not available in a polar solvent-resistant formula.
Correct Answer
B. It is effective on Class B fires.Explanation
Fluoro protein foam is effective on Class B fires. This means that it is able to suppress fires that involve flammable liquids such as gasoline, oil, and solvents. Class B fires are typically fueled by liquid substances, and fluoro protein foam is specifically designed to extinguish these types of fires by creating a blanket over the fuel surface, preventing the release of flammable vapors and cooling the fuel to prevent re-ignition. It is important to note that fluoro protein foam may not be as effective on other types of fires, such as Class A fires (involving ordinary combustible materials) or fires involving polar solvents.Rate this question:
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- 11.
Why should foam be applied so that it flows gently across a liquid?
- A.
Because liquid agitation will increase the temperature
- B.
To avoid directly upsetting the burning surface
- C.
To prevent disruption of the foam blanket
- D.
To prevent entraining additional air
Correct Answer
B. To avoid directly upsetting the burning surfaceExplanation
Foam should be applied so that it flows gently across a liquid to avoid directly upsetting the burning surface. When foam is applied forcefully or disrupted, it can disturb the burning material and cause the fire to spread or intensify. By allowing the foam to flow gently, it can create a protective blanket over the liquid, smothering the fire and preventing it from spreading. This method helps to effectively extinguish the fire without causing further damage or endangering firefighters.Rate this question:
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- 12.
Which statement about regular protein foam is correct?
- A.
It has good expansion properties.
- B.
It is not effective on class B fires.
- C.
It has a longer shelf life than synthetic foam.
- D.
It is effective on polar solvents.
Correct Answer
A. It has good expansion properties.Explanation
Regular protein foam is a type of firefighting foam that is known for its good expansion properties. When applied to a fire, it expands rapidly, creating a thick foam blanket that helps to smother the flames and prevent re-ignition. This expansion property allows the foam to cover a larger area and provide better fire suppression capabilities. Regular protein foam is commonly used for fighting class A fires, such as those involving wood, paper, and other solid materials. It is not effective on class B fires, which involve flammable liquids and gases. The statement that regular protein foam has good expansion properties is correct.Rate this question:
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- 13.
Which item is an absorbent commonly used in hazardous materials operations?
- A.
Mortar
- B.
Baking soda
- C.
Stone tailings
- D.
Soil
Correct Answer
D. SoilExplanation
Soil is commonly used as an absorbent in hazardous materials operations. It has the ability to absorb and contain spills or leaks of hazardous substances, preventing them from spreading further and causing more damage. Soil is readily available and easy to use, making it a practical choice for absorbing and neutralizing hazardous materials. It can effectively absorb liquids and help in the cleanup and containment of hazardous spills.Rate this question:
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- 14.
Which control tactic should always be considered in transportation emergencies or incidents at fixed facilities?
- A.
Retention
- B.
Diffusion
- C.
Remote valve shut-off
- D.
Damming
Correct Answer
C. Remote valve shut-offExplanation
In transportation emergencies or incidents at fixed facilities, the control tactic that should always be considered is the remote valve shut-off. This tactic involves remotely shutting off valves to stop the flow of hazardous materials or substances, preventing further damage or spreading of the incident. By shutting off the valves remotely, it ensures the safety of responders and minimizes the risk of the incident escalating.Rate this question:
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- 15.
What is the term for attempting to keep the hazardous materials on the site or within the immediate area of the release?
- A.
Remediation
- B.
Containment
- C.
Confinement
- D.
Adsorption
Correct Answer
C. ConfinementExplanation
Confinement refers to the act of attempting to keep hazardous materials on the site or within the immediate area of the release. This can involve various methods such as using barriers, containment systems, or physical means to prevent the spread of the hazardous materials. The goal of confinement is to minimize the potential risks and dangers associated with the release of hazardous materials by keeping them localized and contained.Rate this question:
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- 16.
You have used sandbags to create a barrier to prevent a hazardous liquid from entering a storm drain. Which product control tactic is this?
- A.
Damming
- B.
Diking
- C.
Retention
- D.
Diversion
Correct Answer
D. DiversionExplanation
The use of sandbags to create a barrier to prevent a hazardous liquid from entering a storm drain is an example of the product control tactic known as diversion. By diverting the flow of the liquid away from the storm drain, the sandbags redirect it to a safer location, preventing potential contamination and environmental damage.Rate this question:
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- 17.
Which foam application method is particularly well suited to transport vehicle accidents?
- A.
Bounce-off method
- B.
Rain-down method
- C.
Roll-in method
- D.
Subsurface injection method
Correct Answer
A. Bounce-off methodExplanation
The bounce-off method is particularly well suited to transport vehicle accidents because it involves spraying foam onto the surface of the vehicle, allowing it to bounce off and create a foam blanket. This method is effective in quickly smothering the fire and preventing its spread, as the foam can adhere to different surfaces and provide a barrier against heat and oxygen. Additionally, the bounce-off method allows for better coverage and penetration into hard-to-reach areas, such as engine compartments or underneath the vehicle.Rate this question:
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- 18.
Vapor dispersion with fans or fog streams should only be attempted after:
- A.
An opposing dispersing stream is ready.
- B.
The hazardous material is accurately identified.
- C.
A containment basin is dug.
- D.
The ground has been treated with lime.
Correct Answer
B. The hazardous material is accurately identified.Explanation
Vapor dispersion with fans or fog streams should only be attempted after the hazardous material is accurately identified. This is because different hazardous materials require different methods of dispersion, and using the wrong method can lead to further harm or exacerbate the situation. Therefore, it is crucial to accurately identify the hazardous material before attempting any dispersal methods to ensure the safety of individuals and minimize the potential risks.Rate this question:
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- 19.
Which of the following is a confinement tactic?
- A.
Righting an overturned container
- B.
Diking
- C.
Plugging
- D.
Patching
Correct Answer
B. DikingExplanation
Diking is a confinement tactic used to control or prevent the spread of a hazardous substance. It involves constructing a barrier or embankment to contain the substance within a specific area. This tactic is commonly used in situations where there is a spill or leak, and by creating a physical barrier, it helps to prevent the substance from spreading further and causing more damage.Rate this question:
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- 20.
What is the first step in a dilution operation?
- A.
Assess the viability of the proposed operation.
- B.
Build containment for the diluted product.
- C.
Ensure adequate water supply.
- D.
Determine material compatibility.
Correct Answer
A. Assess the viability of the proposed operation.Explanation
The first step in a dilution operation is to assess the viability of the proposed operation. This involves evaluating factors such as the purpose of the dilution, the desired concentration, and the availability of resources. By conducting this assessment, one can determine if the dilution operation is feasible and if it will achieve the desired outcome. This step is crucial in ensuring the success of the entire dilution process.Rate this question:
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- 21.
In addition to extinguishing flammable liquid fires, what are Class B foams used for hazardous materials incidents?
- A.
To suppress vapor production of unignited fuels
- B.
As a decontamination agent
- C.
To break down the surface tension of fuels
- D.
As an emulsifier for heavy hydrocarbon fuels
Correct Answer
A. To suppress vapor production of unignited fuelsExplanation
Class B foams are not only used to extinguish flammable liquid fires but also to suppress the vapor production of unignited fuels. By creating a blanket of foam, the foam acts as a barrier, preventing the release of flammable vapors from the fuel. This helps to reduce the risk of ignition and potential explosions or further fire spread. By suppressing the vapor production, Class B foams can effectively mitigate the hazards associated with unignited fuels in hazardous materials incidents.Rate this question:
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- 22.
In a hazardous materials situation that is dangerous and unstable and in which responders cannot be properly protected, which action is appropriate?
- A.
Attempt to stabilize the situation.
- B.
Minimize spread of the material.
- C.
Withdraw to a safe distance.
- D.
Stop release of the material.
Correct Answer
C. Withdraw to a safe distance.Explanation
In a hazardous materials situation that is dangerous and unstable, it is appropriate to withdraw to a safe distance. This action ensures the safety of responders as they are unable to be properly protected in such a situation. Attempting to stabilize the situation or minimize the spread of the material may put the responders at further risk. Stopping the release of the material may not be feasible or safe in a dangerous and unstable situation. Therefore, the best course of action is to withdraw to a safe distance to protect oneself from potential harm.Rate this question:
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- 23.
What term means the placement of material to form a barrier that keeps a hazardous material from entering an unwanted area?
- A.
Diversion
- B.
Retention
- C.
Scherring dam
- D.
Diking
Correct Answer
D. DikingExplanation
Diking is the term used to describe the placement of material to form a barrier that prevents a hazardous material from entering an unwanted area. This technique is commonly used in situations where there is a risk of a hazardous material spreading and causing further damage or harm. By creating a barrier, such as a mound or wall, the hazardous material is contained and prevented from entering other areas, thus minimizing the potential risks and protecting the surrounding environment or people.Rate this question:
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- 24.
Which protective action uses water or another liquid to reduce the concentration of a hazardous material?
- A.
Adsorption
- B.
Dilution
- C.
Dispersion
- D.
Suppression
Correct Answer
B. DilutionExplanation
Dilution is a protective action that uses water or another liquid to decrease the concentration of a hazardous material. By adding a large volume of liquid to the hazardous material, the concentration of the material is reduced, making it less harmful or dangerous. This method is commonly used in situations where the hazardous material is in a liquid or gas form and needs to be diluted to a safe level.Rate this question:
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- 25.
Which type of dam is used to contain materials lighter than water?
- A.
Split
- B.
Separation
- C.
Underflow
- D.
Gravity
Correct Answer
C. UnderflowExplanation
An underflow dam is used to contain materials that are lighter than water. This type of dam is designed to allow the lighter materials to flow underneath the dam while preventing them from mixing with the water. This is achieved by creating a barrier that allows the water to flow over the top while the lighter materials pass underneath. This is commonly used in mining operations, where materials such as tailings or waste rock need to be contained and separated from the water.Rate this question:
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- 26.
In which process is a material used to soak up and hold a liquid hazardous material like a sponge holds water?
- A.
Absorption
- B.
Abduction
- C.
Adduction
- D.
Osmosis
Correct Answer
A. AbsorptionExplanation
Absorption is the process in which a material soaks up and holds a liquid hazardous material, similar to how a sponge holds water. This process involves the liquid being drawn into the material's pores and being retained within its structure. Unlike osmosis, which involves the movement of solvent molecules across a semi-permeable membrane, absorption does not require a membrane and can occur in any material capable of retaining the liquid. Abduction and adduction are unrelated terms and do not pertain to the given context.Rate this question:
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- 27.
The primary objective of the __________ phase of a hazardous materials incident is to return the property or site of the incident to its original condition.
- A.
Salvage
- B.
Recovery
- C.
Mitigation
- D.
Restoration
Correct Answer
B. RecoveryExplanation
The primary objective of the recovery phase of a hazardous materials incident is to return the property or site of the incident to its original condition. This phase focuses on the cleanup and restoration efforts after the incident has been contained and mitigated. It involves removing any hazardous materials, decontaminating the area, and repairing any damage caused by the incident. The goal is to restore the property or site to its pre-incident state and ensure the safety of the surrounding environment.Rate this question:
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- 28.
Absorption is a difficult technique for operations level responders at a hazardous materials incident because:
- A.
It requires being in close proximity to the hazardous material.
- B.
It must be performed by personnel in Level A PPE.
- C.
It is a precise, technically advanced procedure.
- D.
The absorbents are difficult to handle.
Correct Answer
A. It requires being in close proximity to the hazardous material.Explanation
Absorption is a difficult technique for operations level responders at a hazardous materials incident because it requires being in close proximity to the hazardous material. This proximity increases the risk of exposure to the hazardous substance, which can be dangerous for the responders. It is important for responders to maintain a safe distance from the hazardous material to minimize the potential for harm.Rate this question:
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- 29.
What term means areas in the terrain or places in a structure where materials might be contained or confined?
- A.
Natural control points
- B.
Declivity
- C.
Topographic basin
- D.
Anchor points
Correct Answer
A. Natural control pointsExplanation
Natural control points refer to areas in the terrain or places in a structure where materials might be contained or confined. These points act as reference points for measuring and controlling the movement or distribution of materials. They are important in various fields such as geology, construction, and environmental management to ensure proper containment and control of materials.Rate this question:
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- 30.
Where are shut-off valves located on MC-331 cargo tanks?
- A.
In the vent housing
- B.
Near the front of the cab
- C.
In the valve box
- D.
At both ends of the tank
Correct Answer
D. At both ends of the tankExplanation
Shut-off valves on MC-331 cargo tanks are located at both ends of the tank. This is important for safety and control purposes as it allows for easy access and control of the flow of materials in and out of the tank. Having shut-off valves at both ends ensures that the tank can be properly sealed and isolated when necessary, preventing leaks and accidents. It also provides flexibility in terms of loading and unloading the tank from either end, depending on the specific requirements of the situation.Rate this question:
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- 31.
What foam application method should be used on open-top storage tank fires?
- A.
Bounce-off method
- B.
Roll-in method
- C.
Rain-down method
- D.
Subsurface injection method
Correct Answer
A. Bounce-off methodExplanation
The bounce-off method should be used on open-top storage tank fires. This method involves directing the foam stream towards a solid object, such as a wall or a baffle, which causes the foam to bounce off and spread across the surface of the fire. This helps to create a foam blanket that can suppress the fire and prevent reignition.Rate this question:
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- 32.
Which method of product control results in one material physically adhering to another?
- A.
Dilution
- B.
Retention
- C.
Absorption
- D.
Adsorption
Correct Answer
D. AdsorptionExplanation
Adsorption is the process in which one material physically adheres to the surface of another material. This occurs when molecules or ions from the material being adsorbed are attracted to the surface of the adsorbent material. In the context of product control, adsorption can be used to remove impurities or contaminants from a product by allowing them to adhere to a surface, thereby improving the quality of the final product. This is different from absorption, which involves the penetration of one material into another, and retention, which refers to the ability to hold or keep something.Rate this question:
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- 33.
How much water is needed to effectively dilute a hazardous material?
- A.
A volume equal to three times that of the material to be diluted
- B.
A volume equal to twice that of the material to be diluted
- C.
It varies, depending on the material to be diluted.
- D.
A volume equal to four times that of the material to be diluted
Correct Answer
C. It varies, depending on the material to be diluted. -
- 34.
Which type of foam is produced by pumping large volumes of air through a small screen coated with a foam solution?
- A.
Protein foam
- B.
High-expansion foam
- C.
Aqueous film-forming foam
- D.
Fluoroprotein foam
Correct Answer
B. High-expansion foamExplanation
High-expansion foam is produced by pumping large volumes of air through a small screen coated with a foam solution. This type of foam is characterized by its ability to expand significantly in volume, creating a large amount of foam from a relatively small amount of foam solution. It is commonly used in firefighting and emergency response situations where rapid and effective coverage is needed to smother and extinguish fires. High-expansion foam is able to quickly fill large spaces and create a blanket-like barrier to suppress fires.Rate this question:
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- 35.
Which cargo tanks are certified to transport flammable and combustible liquids chemicals transported at low pressure (under 25 pounds per square inch)?
- A.
MC-312/DOT-412
- B.
MC-331/DOT-431
- C.
MC-307/DOT-407
- D.
MC-306/DOT-406
Correct Answer
C. MC-307/DOT-407Explanation
MC-307/DOT-407 cargo tanks are certified to transport flammable and combustible liquids chemicals at low pressure (under 25 pounds per square inch).Rate this question:
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- 36.
Which is a common adsorbent material?
- A.
Sawdust
- B.
Peat moss
- C.
Nitric acid
- D.
Activated carbon
Correct Answer
D. Activated carbonExplanation
Activated carbon is a common adsorbent material because it has a high surface area and a porous structure. This allows it to effectively adsorb and remove impurities, toxins, and pollutants from gases, liquids, and solids. Activated carbon is widely used in various industries, including water and air purification, gas masks, chemical processing, and food and beverage production. It is also used in the form of filters in air and water purification systems to remove odors, colors, and contaminants.Rate this question:
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- 37.
You have dug a shallow pit to collect and hold a hazardous liquid. Which control tactic is this?
- A.
Detainment
- B.
Diking
- C.
Retention
- D.
Containment
Correct Answer
C. RetentionExplanation
Retention is the correct answer because it refers to the act of collecting and holding a hazardous liquid in a shallow pit. This control tactic involves preventing the liquid from spreading or contaminating the surrounding environment. By retaining the liquid in the pit, it can be safely managed and disposed of without causing harm.Rate this question:
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- 38.
When applying foam to a pool of burning fuel, it is important to avoid:
- A.
Using standard fog or smooth-bore nozzles to apply the foam.
- B.
Directing the foam onto any surface other than the liquid.
- C.
Agitating the surface of the liquid.
- D.
Using alcohol-resistant formulations.
Correct Answer
C. Agitating the surface of the liquid.Explanation
When applying foam to a pool of burning fuel, it is important to avoid agitating the surface of the liquid. Agitating the surface can cause the fuel to splash and spread the fire, making the situation worse. It is crucial to apply the foam gently and evenly onto the liquid surface to smother the fire effectively. Using standard fog or smooth-bore nozzles may not provide the desired coverage and may not be as effective in extinguishing the fire. Directing the foam onto any surface other than the liquid can also be counterproductive as it may divert the foam away from the fire. Alcohol-resistant formulations are not relevant to this situation.Rate this question:
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- 39.
When the foam is applied to a hazardous materials spill, what happens to the volume of the spill?
- A.
It depends on the substance involved.
- B.
It increases.
- C.
It decreases.
- D.
It remains the same.
Correct Answer
B. It increases.Explanation
When foam is applied to a hazardous materials spill, it increases the volume of the spill. Foam is typically used to suppress and contain the hazardous material, creating a barrier that prevents further spread. As the foam expands, it covers a larger area, effectively increasing the volume of the spill.Rate this question:
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- 40.
When is the application of high-expansion foam most appropriate?
- A.
When foam with high water content is required
- B.
When flooding a large area with foam
- C.
When using as a wetting agent
- D.
When vapor suppression of polar solvents is required
Correct Answer
B. When flooding a large area with foamExplanation
High-expansion foam is most appropriate when flooding a large area with foam. High-expansion foam is a type of firefighting foam that expands significantly when applied, creating a thick blanket of foam that can quickly cover and smother a large area. This makes it particularly effective for extinguishing fires in large spaces, such as warehouses or aircraft hangars, where a large amount of foam is needed to quickly suppress the fire. The high expansion ratio of this foam allows it to cover a larger surface area with less water content, making it an efficient choice for large-scale fire suppression.Rate this question:
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- 41.
Aqueous film-forming foam works primarily by:
- A.
Cooling the fuel.
- B.
Forming a blanket to suppress vapors.
- C.
Inhibiting the chemical chain reaction.
- D.
Displacing oxygen with an inert gas.
Correct Answer
B. Forming a blanket to suppress vapors.Explanation
Aqueous film-forming foam (AFFF) works primarily by forming a blanket to suppress vapors. When AFFF is applied to a fire, it creates a layer of foam that covers the fuel surface, preventing the release of flammable vapors. This blanket acts as a barrier, separating the fuel from the oxygen in the air and reducing the chances of ignition. By suppressing the vapors, AFFF helps to control and extinguish the fire.Rate this question:
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- 42.
What is an identifying characteristic of a cargo tank truck designed to carry liquefied gases such as liquefied petroleum gas?
- A.
Insulated tank shell
- B.
Rounded tank ends
- C.
Top-mount valve controls
- D.
External structural rings
Correct Answer
B. Rounded tank endsExplanation
Rounded tank ends are an identifying characteristic of a cargo tank truck designed to carry liquefied gases such as liquefied petroleum gas. This design feature helps to evenly distribute the pressure inside the tank and minimize stress concentrations, reducing the risk of tank failure. The rounded ends also provide additional structural strength to the tank, making it more durable and resistant to damage during transportation.Rate this question:
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- 43.
Which tactic lowers the concentration of a vapor cloud by spreading it out?
- A.
Gas retention
- B.
Diffusion
- C.
Vapor dispersion
- D.
Ventilation
Correct Answer
C. Vapor dispersionExplanation
Vapor dispersion is the tactic that lowers the concentration of a vapor cloud by spreading it out. This process involves the spreading and dilution of the vapor cloud in order to reduce its concentration and potential harm. It is an effective strategy to prevent the buildup of dangerous levels of vapor and minimize the risks associated with a concentrated cloud.Rate this question:
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- 44.
What foam application method should be used on a pooled liquid fire on the ground producing an intense thermal column?
- A.
Roll-in method
- B.
Bounce-off method
- C.
Subsurface injection method
- D.
Rain-down method
Correct Answer
A. Roll-in methodExplanation
The roll-in method should be used on a pooled liquid fire on the ground producing an intense thermal column. This method involves directing the foam towards the base of the fire and allowing it to roll across the liquid surface, covering the entire area. This helps to smother the fire and prevent re-ignition. The roll-in method is effective in controlling intense fires and minimizing the thermal column.Rate this question:
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- 45.
What is the first step in dike construction?
- A.
Determine the number and location of the pipes.
- B.
Dig a shallow depression.
- C.
Determine which diking material will be compatible with the spilled material.
- D.
Spread out the plastic sheeting.
Correct Answer
C. Determine which diking material will be compatible with the spilled material.Explanation
The first step in dike construction is to determine which diking material will be compatible with the spilled material. This is important because different materials may have different properties and may react differently to the spilled material. By choosing a compatible diking material, the effectiveness of the dike in containing and controlling the spilled material can be maximized.Rate this question:
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- 46.
Which phase of a hazardous materials incident begins when the imminent danger to people, property, and the environment is controlled and clean-up begins?
- A.
Recovery
- B.
Definitive
- C.
Remediation
- D.
Mitigation
Correct Answer
A. RecoveryExplanation
The correct answer is Recovery. Recovery is the phase of a hazardous materials incident that begins when the imminent danger to people, property, and the environment is controlled and clean-up begins. This phase focuses on restoring the affected area to its pre-incident condition and ensuring the safety and well-being of the affected individuals and the environment. It involves activities such as removing contaminated materials, decontaminating affected areas, and restoring infrastructure and services.Rate this question:
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- 47.
In which method of foam application is a bank of foam formed on the ground in front of the flammable liquid pool and pushed over the pool by the continued application of foam?
- A.
Bounce-off method
- B.
Subsurface injection method
- C.
Rain-down method
- D.
Roll-in method
Correct Answer
D. Roll-in methodExplanation
The roll-in method of foam application involves forming a bank of foam on the ground in front of the flammable liquid pool and pushing it over the pool by continuously applying foam. This method is effective in covering the entire surface of the pool with foam, creating a barrier between the flammable liquid and the surrounding environment. By pushing the foam over the pool, it helps to suppress the fire and prevent the flammable liquid from igniting or spreading.Rate this question:
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- 48.
An aboveground storage tank has leaked flammable liquid into the surrounding diked containment area. A foam stream is directed against the side of the tank. Foam is running down the side of the tank and covering the spilled fuel in the containment area. Which foam application method does this describe?
- A.
Roll-in method
- B.
Rain-down method
- C.
Subsurface injection method
- D.
Bounce-off method
Correct Answer
D. Bounce-off methodExplanation
The bounce-off method is the correct answer because it involves directing a foam stream against the side of the tank, causing the foam to bounce off and run down the side of the tank. The foam then covers the spilled fuel in the containment area. This method is effective in containing and suppressing flammable liquid spills by creating a foam blanket on the surface of the spilled fuel, preventing it from igniting and spreading.Rate this question:
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- 49.
Which of the following is a containment tactic?
- A.
Damming
- B.
Diking
- C.
Plugging
- D.
Vapor control
Correct Answer
C. PluggingExplanation
Plugging is a containment tactic that involves sealing off or blocking a pathway or opening to prevent the movement of fluids or gases. It is commonly used in situations where there is a leak or potential for leakage, such as in oil and gas wells or pipelines. By effectively sealing the opening, plugging helps to prevent the spread of contaminants and minimize the environmental impact. Other containment tactics mentioned in the options, such as damming, diking, and vapor control, are not specifically focused on sealing off openings but rather on redirecting or controlling the movement of fluids or gases.Rate this question:
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- 50.
The concept of adsorption is most similar to:
- A.
A sponge.
- B.
Burial.
- C.
Diffusion.
- D.
Velcro.
Correct Answer
D. Velcro.Explanation
Velcro is the correct answer because adsorption is the process in which molecules or particles adhere to the surface of a solid or liquid. Similarly, Velcro is a fastening material that consists of two strips, one with tiny hooks and the other with small loops, which adhere to each other when pressed together. Just like adsorption, Velcro involves the attachment of two surfaces. The other options, such as a sponge, burial, and diffusion, do not involve the same concept of surface attachment.Rate this question:
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Current Version
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Mar 22, 2023Quiz Edited by
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May 01, 2019Quiz Created by
Abdulrahman