Chapter 4

Question 1

An understanding of fire dynamics applied within the context of structure fires can provide a fire officer or a firefighter with means to assess how a fire will grow and spread within a structure and how best to control that growth.

Answer 1

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Question 2

Fires in today’s fire environment, fueled predominantly by synthetic materials, commonly become ventilation-limited

Answer 2

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Question 3

How, where, and when a fire receives oxygen greatly impacts the fire dynamics and the resulting thermal environment inside the structure.

Answer 3

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Question 4

In the 1950’s a wide range of synthetic materials called polymers became available for use in clothing, furniture, interior finish, and insulation

Answer 4

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Question 5

Flexible polyurethane foam is one of the most common materials used in upholstered furniture.

Answer 5

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Question 6

The release of America Burning in 1973 generated funding and programs that resulted in studies focused on fire dynamics in a compartment, toxicity of fire gases, flammability of furniture, plastics, fire detection, suppression and firefighting PPE.

Answer 6

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Question 7

The first textbook on fire dynamics was authored by Dougal Drysdale and published in 1985.

Answer 7

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Question 8

The flashover times for the modern room averaged 235 seconds after ignition.

Answer 8

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Question 9

The average flashover times for the two legacy rooms was 1912 seconds after ignition.

Answer 9

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