Limited Air Supply in Compartment Fires

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What is the most effective method of increasing heat release rate in a fuel-limited fire?

Providing more fuel (correct)

Cooling the hot fire gases

Allowing additional air into the compartment

Adding more ventilation points

In a fuel-limited, fully developed fire, what happens when all the fuel becomes involved?

Fire reaches its peak (correct)

Heat release rate decreases

Oxygen supply increases

Fire self-extinguishes

What action would add oxygen to a ventilation-limited compartment fire and allow it to grow?

Adding more fuel to the compartment

Cooling the hot fire gases

Allowing additional air into the compartment (correct)

Extinguishing some of the burning fuel

How does a ventilation-limited fire reach its peak?

By consuming all available fuel Signup and view all the answers

What does the text warn about regarding transitioning a ventilation-limited fire to a fuel-limited fire?

"Only mechanism is to extinguish burning fuel" Signup and view all the answers

During the decay stage, what leads to a fire's self-extinguishment in fuel-limited fires?

Consuming all available fuel Signup and view all the answers

'Decay stage' in a fuel-limited fire usually indicates what?

"Final stage before self-extinguishment" Signup and view all the answers

'Ventilation-limited decay' is not necessarily the final stage of a fire because it awaits what?

"New supply of oxygen" Signup and view all the answers

What situation occurs when a fire runs out of available fuel or oxygen?

Decay stage Signup and view all the answers

How can firefighters reduce the risk of unpredictable window failure in a ventilation-limited fire?

Transition the fire to a fuel-limited condition Signup and view all the answers

What occurs during the ventilation-limited decay stage of a fire?

Fire awaits a new supply of oxygen Signup and view all the answers

In a fully developed, ventilation-limited fire, why does the fire lack oxygen available to grow?

The number and size of openings in the compartment limit air entrainment Signup and view all the answers

What leads to a fire's self-extinguishment when it runs out of fuel?

A decay in the heat release rate Signup and view all the answers

Why is it challenging for compartment fires to enter a state of fuel-limited decay?

Compartment fires are usually ventilation-limited fires Signup and view all the answers

What is a key difference between fuel-limited fires and ventilation-limited fires reaching their peak?

'Fuel-limited fires consume all the available oxygen from air intake, while ventilation-limited fires have additional fuel available.' Signup and view all the answers

'Adding additional air into a compartment via an opening will result in what during a ventilation-limited fire?'

'Higher peak release rate' Signup and view all the answers

'What is required for firefighters to ensure that the decay stage of a ventilation-limited fire is the final stage?'

'Cooling hot fire gases before ventilation' Signup and view all the answers

'Why must firefighters transition a ventilation-limited fire from growth stage to decay stage?'

'To lessen the likelihood of gases igniting with fresh oxygen supply' Signup and view all the answers

In a fully developed, ventilation-limited fire, why does the fire lack oxygen available to grow?

Insufficient air intakes in the compartment restrict air entrainment Signup and view all the answers

What leads to a fire's self-extinguishment when it runs out of fuel?

Absence of available fuel Signup and view all the answers

Limited Air Supply in Compartment Fires

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Questions and Answers

What is the most effective method of increasing heat release rate in a fuel-limited fire?

In a fuel-limited, fully developed fire, what happens when all the fuel becomes involved?

What action would add oxygen to a ventilation-limited compartment fire and allow it to grow?

How does a ventilation-limited fire reach its peak?

What does the text warn about regarding transitioning a ventilation-limited fire to a fuel-limited fire?

During the decay stage, what leads to a fire's self-extinguishment in fuel-limited fires?

'Decay stage' in a fuel-limited fire usually indicates what?

'Ventilation-limited decay' is not necessarily the final stage of a fire because it awaits what?

What situation occurs when a fire runs out of available fuel or oxygen?

How can firefighters reduce the risk of unpredictable window failure in a ventilation-limited fire?

What occurs during the ventilation-limited decay stage of a fire?

In a fully developed, ventilation-limited fire, why does the fire lack oxygen available to grow?

What leads to a fire's self-extinguishment when it runs out of fuel?

Why is it challenging for compartment fires to enter a state of fuel-limited decay?

What is a key difference between fuel-limited fires and ventilation-limited fires reaching their peak?

'Adding additional air into a compartment via an opening will result in what during a ventilation-limited fire?'

'What is required for firefighters to ensure that the decay stage of a ventilation-limited fire is the final stage?'

'Why must firefighters transition a ventilation-limited fire from growth stage to decay stage?'

In a fully developed, ventilation-limited fire, why does the fire lack oxygen available to grow?

What leads to a fire's self-extinguishment when it runs out of fuel?

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