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Questions and Answers
What happens to the volume of a gas when its pressure increases, while keeping the temperature constant?
What happens to the volume of a gas when its pressure increases, while keeping the temperature constant?
- The volume fluctuates.
- The volume decreases. (correct)
- The volume remains the same.
- The volume increases.
Under which conditions does Charles' law apply?
Under which conditions does Charles' law apply?
- Constant pressure and variable temperature. (correct)
- Constant temperature and variable pressure.
- Constant volume and variable pressure.
- Constant pressure and variable volume.
What is the effect of constant volume on the pressure of an ideal gas when the temperature increases?
What is the effect of constant volume on the pressure of an ideal gas when the temperature increases?
- The pressure remains constant.
- The pressure fluctuates unpredictably.
- The pressure increases. (correct)
- The pressure decreases.
What does Avogadro's law state about the amount of gas at constant temperature and pressure?
What does Avogadro's law state about the amount of gas at constant temperature and pressure?
Which variable does the combined gas law link together?
Which variable does the combined gas law link together?
If a cylinder with a volume of 5 ft³ releases gas, what would be the approximate volume of gas released given a significant pressure drop?
If a cylinder with a volume of 5 ft³ releases gas, what would be the approximate volume of gas released given a significant pressure drop?
What process involves heat transfer without the actual movement of molecules?
What process involves heat transfer without the actual movement of molecules?
In convection heat transfer, which factor influences the heat transfer rate?
In convection heat transfer, which factor influences the heat transfer rate?
How does radiation transfer heat between bodies?
How does radiation transfer heat between bodies?
Which type of sprinkler system does not hold water under pressure but fills with water when activated?
Which type of sprinkler system does not hold water under pressure but fills with water when activated?
What defines Class 1 hazardous location classification?
What defines Class 1 hazardous location classification?
Which factor is most critical in developing emergency response plans?
Which factor is most critical in developing emergency response plans?
What is the term for the minimum temperature at which a material burns without an ignition source?
What is the term for the minimum temperature at which a material burns without an ignition source?
For combustion to start and proceed, what combination is required?
For combustion to start and proceed, what combination is required?
What is the most important consideration to prevent fire loss in a flammable liquid storage area?
What is the most important consideration to prevent fire loss in a flammable liquid storage area?
Why is carbon monoxide such a dangerous gas produced in fires?
Why is carbon monoxide such a dangerous gas produced in fires?
What does it indicate if the gaseous products of combustion have a vapor density of less than 1?
What does it indicate if the gaseous products of combustion have a vapor density of less than 1?
What is the fire point in relation to the flash point?
What is the fire point in relation to the flash point?
Which of the following is NOT a type of hazardous location classification?
Which of the following is NOT a type of hazardous location classification?
Which NFPA guideline refers to fire precaution and protection standards?
Which NFPA guideline refers to fire precaution and protection standards?
What is the flash point of a flammable liquid?
What is the flash point of a flammable liquid?
At what percentage of the Lower Explosive Limit (LEL) is a gas considered explosive?
At what percentage of the Lower Explosive Limit (LEL) is a gas considered explosive?
Which gas law states that the volume of a gas is directly proportional to its absolute temperature, assuming constant pressure?
Which gas law states that the volume of a gas is directly proportional to its absolute temperature, assuming constant pressure?
What is the auto-ignition temperature?
What is the auto-ignition temperature?
How is the Upper Explosive Limit (UEL) defined?
How is the Upper Explosive Limit (UEL) defined?
What is the formula to convert % Vol to PPM?
What is the formula to convert % Vol to PPM?
In the context of gases, what do Boyle's Law and Charles' Law collectively describe?
In the context of gases, what do Boyle's Law and Charles' Law collectively describe?
For a mixture containing 50% methane (LEL 5%) and 50% propane (LEL 2%), how is the overall LEL calculated?
For a mixture containing 50% methane (LEL 5%) and 50% propane (LEL 2%), how is the overall LEL calculated?
What is the purpose of issuing a work permit for entry into a confined space?
What is the purpose of issuing a work permit for entry into a confined space?
What is the relationship between flash point, fire point, and auto-ignition temperature?
What is the relationship between flash point, fire point, and auto-ignition temperature?
Flashcards
Flash Point
Flash Point
The lowest temperature at which a flammable liquid produces enough vapor to ignite when exposed to a flame, but the fire quickly stops.
Fire Point
Fire Point
The lowest temperature at which a flammable liquid generates enough vapor to ignite and support continuous burning.
Autoignition Temperature
Autoignition Temperature
The lowest temperature at which a flammable liquid will ignite spontaneously without an external heat source like a flame or spark.
Lower Explosive Limit (LEL)
Lower Explosive Limit (LEL)
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Upper Explosive Limit (UEL)
Upper Explosive Limit (UEL)
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Confined Space Work Permit
Confined Space Work Permit
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Explosive Gas Mixture
Explosive Gas Mixture
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Volume to PPM Conversion
Volume to PPM Conversion
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LEL to PPM Conversion
LEL to PPM Conversion
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PPM to Mass Concentration
PPM to Mass Concentration
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Boyle's Law
Boyle's Law
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Charles' Law
Charles' Law
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Gay-Lussac's Law
Gay-Lussac's Law
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Avogadro's Law
Avogadro's Law
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Combined Gas Law
Combined Gas Law
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Ideal Gas Law
Ideal Gas Law
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Conduction
Conduction
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Convection
Convection
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Radiation
Radiation
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Sprinkler System
Sprinkler System
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Study Notes
Emergency Preparedness, Fire Prevention, and Security
- This domain covers emergency preparedness, fire prevention, and security measures.
- Key aspects include flash point, fire point, autoignition temperature, Lower Explosive Limit (LEL), Upper Explosive Limit (UEL), and conversions between different units.
- Important considerations for confined spaces are highlighted.
Flash Point
- The flash point is the lowest temperature at which a flammable liquid produces enough vapor to form an ignitable mixture.
- If exposed to a flame, the mixture will ignite momentarily and self-extinguish.
Fire Point
- The fire point is the lowest temperature at which a flammable liquid generates enough vapor to sustain continuous burning.
- This self-sustained burning occurs even without an external ignition source.
Autoignition Temperature
- Autoignition temperature is the lowest temperature at which a fuel spontaneously ignites in the absence of an external ignition source (like a flame or spark).
- This temperature is always higher than both flash point and fire point.
Lower Explosive Limit (LEL)
- LEL is the minimum concentration of flammable vapor in air needed for the propagation of a flame.
- Below this concentration, a flame will not propagate, even with an ignition source.
Upper Explosive Limit (UEL)
- UEL is the maximum concentration of flammable vapor in air above which a flame will not propagate.
- Above this concentration, there isn't enough vapor to form a readily ignitable mixture.
- Work permit for entry to a confined space is needed when the concentration of flammable substance is below 0.5% of LEL.
Conversions
- Includes conversions between percentage volume and parts per million (PPM)
- Provides conversions from LEL to PPM and from PPM to mg/m³.
- Formulae for conversions are included.
Gas Laws
- Gas laws explain gas behavior.
- Key gas laws covered are:
- Boyle's law (pressure and volume at constant temperature)
- Charles's law (volume and temperature at constant pressure)
- Gay-Lussac's law (pressure and temperature at constant volume)
- Avogadro's law (volume and number of moles at constant temperature and pressure)
- Combined gas law (combining Boyle's, Charles's, and Gay-Lussac's laws)
- Ideal gas law (combining Avogadro's and the combined gas laws)
Modes of Heat Transfer
- Three modes of heat transfer:
- Conduction: Heat transfer through a material without its movement
- Convection: Heat transfer through fluids (liquids and gases) due to their movement.
- Radiation: Heat transfer through electromagnetic waves.
Sprinkler Systems
- Different sprinkler systems exist: dry pipe, wet pipe, deluge, and pre-action.
- These systems protect from fire.
Hazardous Location Classification
- Classifies areas based on the type of hazard (flammable vapors & gases, combustible dust, ignitable fibers, etc.)
- Categorizes potential hazards into classes for risk assessment.
NFPA Fire Diamond
- Provides a standardized way to communicate fire and health hazards.
- Includes four sections: Health hazard, Fire hazard, Reactivity hazard, Specific hazard.
Emergency Response Plans
- Prioritizes protective measures for people, property, and the environment.
- Critical element for preparedness.
Other Key Concepts
- Autoignition temperature
- Ignition temperature
- Flammability limits
- Fire point
- Flash point
- Types of flammable hazards
- Safety considerations
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Description
This quiz explores key concepts of emergency preparedness, fire prevention, and security measures. Topics covered include flash point, fire point, autoignition temperature, and explosion limits. Important considerations for safety in confined spaces are also discussed.
