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Questions and Answers
What is considered the most effective method to control fire hazards according to the Hierarchy of Controls?
What is considered the most effective method to control fire hazards according to the Hierarchy of Controls?
Which of the following is NOT one of the inherently safer design principles?
Which of the following is NOT one of the inherently safer design principles?
Which control method involves creating systems to prevent or mitigate loss of containment?
Which control method involves creating systems to prevent or mitigate loss of containment?
What is the purpose of administrative controls in fire hazard management?
What is the purpose of administrative controls in fire hazard management?
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Personal protective equipment is positioned at what level in the Hierarchy of Controls?
Personal protective equipment is positioned at what level in the Hierarchy of Controls?
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Which of the following actions would fall under the principle of substitution in inherently safer design?
Which of the following actions would fall under the principle of substitution in inherently safer design?
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Why is controlling the fuel source critical in fire hazard management?
Why is controlling the fuel source critical in fire hazard management?
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Which method is aimed at reducing risks by establishing protocols for safe work practices?
Which method is aimed at reducing risks by establishing protocols for safe work practices?
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Which method of inerting involves drawing a vacuum on the vessel before refilling it with inert gas?
Which method of inerting involves drawing a vacuum on the vessel before refilling it with inert gas?
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What is a significant danger associated with pressure inerting?
What is a significant danger associated with pressure inerting?
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Which inerting method is suitable for vessels that are not designed for pressure or vacuum?
Which inerting method is suitable for vessels that are not designed for pressure or vacuum?
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What is the primary hazard linked to open flames in an area where fuel and oxidants are present?
What is the primary hazard linked to open flames in an area where fuel and oxidants are present?
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In siphon inerting, what is the role of the liquid added to the vessel?
In siphon inerting, what is the role of the liquid added to the vessel?
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Why might vacuum inerting be preferred over other inerting methods?
Why might vacuum inerting be preferred over other inerting methods?
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What is indicated by the saturation vapour pressure curve?
What is indicated by the saturation vapour pressure curve?
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What is a key disadvantage of pressure inerting compared to vacuum inerting?
What is a key disadvantage of pressure inerting compared to vacuum inerting?
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What is the importance of knowing a liquid's flashpoint temperature?
What is the importance of knowing a liquid's flashpoint temperature?
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Which of the following measures can help minimize ignition hazards?
Which of the following measures can help minimize ignition hazards?
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Which statement accurately differentiates flammable from combustible liquids?
Which statement accurately differentiates flammable from combustible liquids?
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What happens to gaseous particles in a closed container over time?
What happens to gaseous particles in a closed container over time?
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How is the flashpoint temperature typically estimated?
How is the flashpoint temperature typically estimated?
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Which condition will increase the saturation vapour pressure of a liquid?
Which condition will increase the saturation vapour pressure of a liquid?
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What characterizes a liquid with a flashpoint above 38°C?
What characterizes a liquid with a flashpoint above 38°C?
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What occurs when the number of particles moving from liquid to gas equals the number returning?
What occurs when the number of particles moving from liquid to gas equals the number returning?
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What is the primary purpose of the NFPA-70 standard?
What is the primary purpose of the NFPA-70 standard?
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How are hazardous areas classified according to the National Electrical Code?
How are hazardous areas classified according to the National Electrical Code?
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What does the 'Class' in the class and division system indicate?
What does the 'Class' in the class and division system indicate?
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What is one role of engineers in relation to hazardous classified areas?
What is one role of engineers in relation to hazardous classified areas?
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Which factor is NOT a flammability parameter that should be described?
Which factor is NOT a flammability parameter that should be described?
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Which side of the fire triangle is primarily controlled by a flammable cabinet for storing certain chemicals?
Which side of the fire triangle is primarily controlled by a flammable cabinet for storing certain chemicals?
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What must be ensured when transferring petroleum products in relation to the fire triangle?
What must be ensured when transferring petroleum products in relation to the fire triangle?
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In terms of fire hazards, what does the classification of an area help engineers to assess?
In terms of fire hazards, what does the classification of an area help engineers to assess?
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What causes oily rags to spontaneously ignite?
What causes oily rags to spontaneously ignite?
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Which of the following correctly describes adiabatic compression?
Which of the following correctly describes adiabatic compression?
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How can the risk of fire hazards be effectively reduced?
How can the risk of fire hazards be effectively reduced?
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What is the role of heat in the process of autoignition?
What is the role of heat in the process of autoignition?
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What does the fire triangle consist of?
What does the fire triangle consist of?
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Which scenario is an example of self-heating?
Which scenario is an example of self-heating?
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What happens when a gas is rapidly compressed?
What happens when a gas is rapidly compressed?
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Which legislation addresses fire safety controls?
Which legislation addresses fire safety controls?
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What are the three essential elements needed to create a fire according to the fire triangle?
What are the three essential elements needed to create a fire according to the fire triangle?
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Which of the following is considered an oxidant in combustion reactions?
Which of the following is considered an oxidant in combustion reactions?
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Which source of energy can ignite a combustion reaction?
Which source of energy can ignite a combustion reaction?
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What kind of materials are described as fuels for combustion?
What kind of materials are described as fuels for combustion?
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Which example does NOT represent an oxidant?
Which example does NOT represent an oxidant?
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What can influence how easily a fuel ignites?
What can influence how easily a fuel ignites?
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Which of the following statements about the elements of the fire triangle is correct?
Which of the following statements about the elements of the fire triangle is correct?
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What role does an oxidant play in combustion?
What role does an oxidant play in combustion?
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Study Notes
Fire Hazard and Controls Module
- This module covers fire hazards and controls.
- Upon completion, learners should be able to identify and classify fire hazards, determine prevention and mitigation controls for targeting each side of the fire triangle.
Fire Triangle Elements
- Fire requires three elements: fuel, oxidant, and ignition source.
- Removing any of these elements prevents fire.
Flammability Parameters
- Lower Flammability Limit (LFL): The lowest concentration of fuel vapor for a fire to occur.
- Upper Flammability Limit (UFL): The highest concentration of fuel vapor for a fire to occur.
- Flashpoint Temperature: The lowest temperature at which a liquid forms an ignitable mixture with air.
- Autoignition Temperature (AIT): The lowest temperature at which a vapor-air mixture ignites without an ignition source.
Fire and Humans
- Humans have controlled fire for over a million years.
- Fire has been crucial for human development and history, both positive and destructive.
- Historical examples of major fire incidents are documented, including The Great Chicago Fire, and the Grenfell Tower fire.
- Currently, fires continue to be significant events causing loss of life and property.
Hierarchy of Controls
- Elimination: The most effective control method involves completely removing the hazard.
- Inherent Safety: Designing a process or system to reduce hazard risks.
- Engineering Controls: Implementing systems to prevent or mitigate hazards.
- Administrative Controls: Establishing safe work procedures and training to mitigate risks.
- Personal Protective Equipment (PPE): Using protective equipment to safeguard individuals, but is the least effective.
Fire Hazards
- Fuel Hazards: Controlling fuel sources to prevent fires is essential (examples include storage, quantity, and type).
- Oxidant Controls: Controlling oxidants, which are often oxygen-rich materials, minimizing the amounts present.
- Ignition Source Controls: Avoiding or eliminating ignition sources like open flames, hot surfaces, and static electricity to prevent fires.
- Examples: Identifying flammable liquids, and their proper storage are important aspects of this section.
Static Electricity as an Ignition Hazard
- Static electricity can build up leading to sparks.
- This is particularly relevant when dealing with flammable liquids and electrical components.
- Bonding and grounding can help prevent static buildup and associated risks.
National Electric Code Categories (NFPA 70)
- Class I: Flammable vapors that are present at flammable concentrations.
- Class II: Combustible dusts present at flammable concentrations.
- Class III: Combustible dusts present but not likely to be in suspension.
- Division 1: Flammable conditions are normally present.
- Division 2: Flammable materials are usually within enclosed systems.
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Description
This module explores the various fire hazards and appropriate controls required to mitigate them. You will learn to identify the elements of the fire triangle as well as important flammability parameters that affect fire safety. By the end of this quiz, you will understand how to prevent and manage fire-related risks effectively.
