Fire Protection and Prevention Quiz

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Questions and Answers

What is combustion?

A substance that can start a fire.

A chemical reaction between a fuel and an oxidizing agent producing energy. (correct)

The maximum temperature a liquid can reach before igniting.

A type of fire that involves plastics and rubber.

What defines a flammable liquid?

Any liquid that evaporates quickly.

Any liquid with a flash point above 140°F.

Any liquid that produces high levels of vapor at room temperature.

Any liquid with a flash point below 140°F. (correct)

What is the flash point of a substance?

The temperature at which a liquid gives off vapor capable of forming an ignitable mixture. (correct)

The maximum temperature a liquid can reach without producing vapor.

The minimum temperature a liquid must reach to ignite.

The temperature at which a liquid starts to boil.

What does UFL stand for in fire safety terminology?

Upper Flammability Limit. Signup and view all the answers

What type of materials does Class A fire involve?

Common combustibles like wood and paper. Signup and view all the answers

What is the lower flammability limit (LFL)?

The lower end of the concentration range that can ignite air/vapor mixtures. Signup and view all the answers

Which of the following describes heat of combustion?

The amount of heat evolved by the combustion of 1 g weight of a substance. Signup and view all the answers

What type of fire does a Class K extinguisher primarily address?

Cooking media like oils and grease Signup and view all the answers

What does a numeric rating of 5BC indicate for a Class B or C fire extinguisher?

5 square feet of coverage area Signup and view all the answers

Which of the following is NOT an exception for hydrostatic testing of fire extinguishers?

Extinguisher has been used in a normal fire Signup and view all the answers

For which type of area are dry pipe systems typically installed?

Unheated buildings Signup and view all the answers

What equipment does a Class C fire extinguisher target?

Electrical equipment Signup and view all the answers

What is indicated by red diagonal lines on the new labeling system for fire extinguishers?

Types of fires that should not be extinguished with that extinguisher Signup and view all the answers

What kind of combustible materials are involved in Class D fires?

Combustible metals like magnesium Signup and view all the answers

What does the number rating of a Class A extinguisher signify?

The quantity of extinguishing material in gallons Signup and view all the answers

Which fire extinguisher is suitable for flammable liquids?

Class B Signup and view all the answers

What is the maximum spacing allowed between sprinkler heads in a light-hazard occupancy area?

15 feet Signup and view all the answers

What defines a light-hazard occupancy area?

Low quantity and/or combustibility of contents Signup and view all the answers

What is the maximum spacing between sprinkler heads in extra-hazard occupancy areas?

12 feet Signup and view all the answers

What does flash point refer to?

Minimum temperature for ignition vapor formation Signup and view all the answers

What is the relationship between fire point and flash point?

Fire point is higher than flash point Signup and view all the answers

What does vapor pressure depend on?

The temperature of the liquid Signup and view all the answers

What are components with high vapor pressures commonly referred to as?

Light components Signup and view all the answers

What is the term for the temperature at which a substance continues to burn after ignition?

Fire point Signup and view all the answers

Flammable and explosive limits refer to:

Mixture concentrations that are flammable or explosive Signup and view all the answers

What temperature must ambient conditions reach for dry pipe systems to function?

Below 40°F Signup and view all the answers

What is a key characteristic of deluge systems?

Release water upon activation of a fire alarm Signup and view all the answers

What distinguishes water spray systems from other systems?

They operate without heat sensors Signup and view all the answers

How are preaction systems classified?

Combination of wet, dry, and deluge systems Signup and view all the answers

What is a common application for foam water sprinkler systems?

Data centers Signup and view all the answers

What must happen for water to be released in preaction systems?

Activation of a fire detection system Signup and view all the answers

What feature do water spray systems share with deluge systems?

Designated spray patterns for specific hazards Signup and view all the answers

Where are deluge systems most commonly installed?

High-risk hazard areas with rapid fire spread Signup and view all the answers

What happens when a sprinkler head in a dry pipe system is opened?

Releases water into the distribution system Signup and view all the answers

What must be done to reset a deluge system after activation?

Reset the deluge valve manually Signup and view all the answers

What does the upper flammable limit (UFL) refer to?

The richest mixture that is still flammable Signup and view all the answers

What is the autoignition temperature?

The lowest temperature at which a substance ignites without an external source Signup and view all the answers

How is specific gravity defined?

As the density of a liquid compared to the density of water Signup and view all the answers

What characterizes gases with a vapor density greater than or equal to one?

They are heavier than air and sink Signup and view all the answers

What does the evaporation rate of a substance indicate?

The rate at which it converts to vapor compared to butylacetate Signup and view all the answers

Study Notes

Domain 5: Fire Protection and Prevention

Domain 5 encompasses 10.59% of the curriculum.

Definitions

Combustion: A chemical reaction between a fuel and an oxidizing agent, producing heat and light.
Heat of combustion: The amount of heat released when 1 gram of a substance is burned.
Combustible liquid: Any liquid with a flash point of 140°F or higher and below 200°F.
Flammable liquid: Any liquid with a flash point below 140°F and a vapor pressure not exceeding 40 psia at 100°F.
Flash point: The minimum temperature at which a liquid emits enough vapor to form an ignitable mixture with air.
Upper flammability limit (UFL): The maximum concentration of a combustible substance that can support a flame.
Lower flammability limit (LFL): The minimum concentration of a combustible substance that can support a flame.

Classification of Fires

Class A: Fires involving common combustibles like wood, paper, cloth, and rubber.
Class B: Fires involving flammable liquids, gases, and solvents.
Class C: Fires involving energized electrical equipment.
Class D: Fires involving combustible metals like magnesium and sodium.
Class K: Fires involving combustible cooking oils and grease.

Portable Fire Extinguishers and Travel Distances

Extinguishers are rated for different classes of fire (e.g., Class A, B, C, etc.).
Travel distances to extinguishers vary based on the hazard level.
Maximum coverage areas for different fire extinguishers are specified.

Automatic Sprinkler Systems

Dry Pipe Systems: Installed in areas prone to freezing, water is not present until triggered.
Wet Pipe Systems: More common, water is constantly present in the pipes.
Water Spray Systems: Protect uniquely configured hazards.
Deluge Systems: Used in areas with rapid fire spread.
Preaction Systems: A hybrid of wet, dry, and deluge systems, activated by a fire detection system.
Foam Water Sprinkler Systems: Used for flammable liquids and large fires.

Sprinkler Head Color Codes

Sprinkler heads have color codes indicating maximum ceiling temperatures.

NFPA Standards and Classifications

NFPA (National Fire Protection Association) standards define allowable spacing between sprinklers.
Fire hydrant colors indicate flow rate.
Flammable liquids are classified by flash point and boiling point.
Combustible liquids are also categorized by flash point and boiling point.

Additional Fire Safety Concepts

Fire point: The temperature at which a substance continuously gives off flammable vapor, higher than the flash point.
Flammable and Explosive Limits: Ranges of concentrations where a mixture is flammable or explosive.
Autoignition Temperature: The lowest temperature at which a material ignites without a spark or flame.
Specific Gravity: Describes the density of a liquid compared to water.
Vapor Density: Describes the density of a gas or vapor compared to air.
Evaporation Rate: Rate at which a liquid evaporates.

Storage Requirements for Flammable and Combustible Liquids

OSHA regulations define maximum allowable sizes of containers for both flammable and combustible liquids.
Container types (e.g., glass, metal drums, etc.) are specified for each class.

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Description

Test your knowledge on fire protection and prevention with this quiz that covers key concepts such as combustion, heat of combustion, and classifications of fires. Understand the different types of flammable liquids and their properties. Perfect for students in safety training and fire protection courses.