ASP Domain IV Fire Protection Flashcards

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Questions and Answers

What does NFPA stand for?

National Fire Policy Association

National Fire Protection Association (correct)

National Fire Prevention Agency

National Fire Preparedness Association

What is a flammable liquid?

A liquid that has a flash point below 100 degrees F and a vapor pressure not exceeding 40 psia at 100 degrees F.

What is a combustible liquid?

Liquid having a flash point at or above 100°F (37.8°C) and below 200°F (93.3°C).

What is Class I?

Flashpoint less than 100F. Signup and view all the answers

Define Class IA Flammable Liquid.

Flashpoint below 73F; Boiling point below 100F. Signup and view all the answers

Define Class IB Flammable Liquid.

Flash Point below 73F; Boiling point at or above 100F. Signup and view all the answers

Class IC flammable liquids have a flash point and _.

greater than or equal to 73 °F and below 100 °F Signup and view all the answers

Class II combustible liquids have a flash point and _.

greater than or equal to 100 °F and below 140 °F Signup and view all the answers

What is the flash point for Class IIIA combustible liquids?

140 degrees F and below 200 degrees F. Signup and view all the answers

Class IIIB combustible liquids have a flash point _______.

greater than or equal to 200 °F Signup and view all the answers

What is a flash point?

The lowest temperature at which a liquid can generate enough vapor above its surface to support combustion in the presence of a source of ignition. Signup and view all the answers

Define vapor pressure.

The pressure exerted by a vapor over a liquid at equilibrium. Signup and view all the answers

What does equilibrium refer to in chemistry?

A state of balance between liquid molecules and vapor. Signup and view all the answers

What is the fire point?

Material will continue to burn. Signup and view all the answers

What is usually the relationship between flash point and fire point?

A few degrees higher than flash point. Signup and view all the answers

What is the lower flammable limit?

Minimum vapor concentration supporting combustion. Signup and view all the answers

What is the upper flammable limit?

Maximum vapor concentration supporting combustion. Signup and view all the answers

Define autoignition temperature.

Lowest temperature that will produce combustion in the absence of an ignition source. Signup and view all the answers

What does specific gravity measure?

Ratio of a mineral's weight compared with the weight of an equal volume of water. Signup and view all the answers

Define vapor density.

The weight of an airborne concentration (vapor or gas) as compared to an equal volume of air in the same conditions of temperature and pressure. Signup and view all the answers

What is evaporation rate?

Rate at which a liquid is converted into vapor at a given temperature and pressure. Signup and view all the answers

What does water solubility refer to in the context of flammable liquids?

Flammable liquids, such as alcohols, ethers, and ketones, are completely or partially soluble in water. Signup and view all the answers

Define boiling point of a liquid.

Temperature at which the liquid transforms into vapor at a given pressure. Signup and view all the answers

What is a Boiling Liquid-Expanding Vapor Explosion (BLEVE)?

Failure of a container at atmospheric pressure holding a liquid above its boiling temperature. Signup and view all the answers

What characterizes a flammable gas?

Has a UFL of 13% or less by volume at ambient temp and pressure or has a flammability range that is wider than 12% at ambient temp and pressure. Signup and view all the answers

What is the relationship between the volume occupied by gas and temperature and pressure?

Directly proportional to its temperature and inversely proportional to its pressure. Signup and view all the answers

What is carbon monoxide?

An odorless very poisonous gas that is a product of incomplete combustion of carbon materials. Signup and view all the answers

What does CO2 stand for?

Carbon dioxide. Signup and view all the answers

Define hydrogen cyanide.

Deadly gas produced during fires from the combustion of materials. Signup and view all the answers

Study Notes

Fire Protection Basics

NFPA: National Fire Protection Association, a key organization for fire safety standards.
Flammable Liquid: Flash point below 100°F and vapor pressure not exceeding 40 psia at 100°F.
Combustible Liquid: Flash point at or above 100°F and below 200°F (37.8°C - 93.3°C).

Classification of Liquids

Class I Liquids: Flashpoint less than 100°F.
Class IA Flammable Liquid: Flashpoint below 73°F; boiling point below 100°F.
Class IB Flammable Liquid: Flashpoint below 73°F; boiling point at or above 100°F.
Class IC Flammable Liquid: Flashpoint greater than or equal to 73°F and below 100°F.
Class II Combustible Liquids: Flashpoint greater than or equal to 100°F and below 140°F.
Class IIIA Combustible Liquids: Flashpoint at or above 140°F and below 200°F.
Class IIIB Combustible Liquids: Flashpoint greater than or equal to 200°F.

Fire Behavior and Characteristics

Flash Point: Lowest temperature a liquid generates sufficient vapor for combustion.
Fire Point: Temperature where material continues to burn; typically a few degrees higher than flash point.
Lower Flammable Limit (LFL): Minimum vapor concentration for combustion; increases in temperature/pressure lower LFL.
Upper Flammable Limit (UFL): Maximum vapor concentration for combustion; increases in temperature/pressure raise UFL.
Autoignition Temperature: Lowest temperature causing combustion without an ignition source.

Physical Properties of Liquids

Specific Gravity: Weight of a mineral compared to equal volume of water; values less than 1 indicate lighter than water.
Vapor Density: Weight of vapor compared to equal volume of air; vapors from flammable liquids are typically heavier than air.
Evaporation Rate: How rapidly a liquid converts to vapor at given conditions.
Water Solubility: Some flammable liquids like alcohols dissolve in water, reducing flammability and static hazards.

Temperature and Pressure Dynamics

Boiling Point: Temperature a liquid turns into vapor; decreases under lower pressure.
BLEVE: Boiling Liquid-Expanding Vapor Explosion occurs when a container fails at atmospheric pressure while holding liquid above boiling temperature.
Gas Behavior: Volume occupied by gas is directly proportional to temperature and inversely proportional to pressure.

Toxic Gases

Carbon Monoxide (CO): Odorless, highly poisonous gas from incomplete combustion; 210 times more reactive with blood than oxygen.
Carbon Dioxide (CO2): Commonly produced gas during combustion.
Hydrogen Cyanide: Highly toxic gas produced from burning certain materials.

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Description

Test your knowledge on fire protection terminology with these flashcards focused on the ASP Domain IV. This quiz covers key concepts such as NFPA, flammable liquids, and combustible liquids. Perfect for anyone preparing for fire safety certification or looking to enhance their understanding of fire protection standards.