NFPA CFPS Exam - Topic 3 Question 18 Discussion

Actual exam question for NFPA's CFPS exam

Question #: 18
Topic #: 3

[All CFPS Questions]

The computer simu-lation egress model that is often referred to as the hydraulic model and also known as

Asingle-parameter estimation model.

Bbehavioral simulation model.

Cegress model.

Dmovement model.

Show Suggested Answer

Suggested Answer: D

The hydraulic model is a type of movement model that simulates the flow of people through egress components based on equations derived from fluid dynamics. It is also known as the single-parameter estimation model because it uses only one parameter, the effective width, to describe the movement of people. The hydraulic model does not account for the behavioral aspects of egress, such as pre-evacuation time, decision making, group dynamics, or communication. A behavioral simulation model is a different type of egress model that incorporates these factors.

Employing the Hydraulic Model in Assessing Emergency Movement - Springer1

NFPA 101: Life Safety Code, 2023 Edition, Section 7.2.32

NFPA Fire Protection Handbook, 20th Edition, Chapter 59: Egress3

by Glendora at Nov 19, 2025, 08:59 PM

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Glynda

1 day ago

I’m confused. They all sound similar!

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Lai

6 days ago

I'm going with D) movement model. It makes sense for simulations.

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Annamae

11 days ago

I lean towards B) behavioral simulation model. It fits the context.

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Paz

17 days ago

Not sure about that, sounds a bit off to me.

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Evan

22 days ago

Yeah, I've heard it's also called the movement model.

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Detra

27 days ago

I thought it was just the egress model.

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Marion

2 months ago

It's definitely called the hydraulic model!

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Diane

2 months ago

I'm feeling confident about B) behavioral simulation model. That's my final answer!

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Ciara

2 months ago

Haha, this question is a real brain-teaser. I'm going with C) egress model, but who knows?

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Ty

2 months ago

Hmm, I'm not sure about this one. Maybe A) single-parameter estimation model?

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Tracey

2 months ago

D) movement model sounds like the most accurate description to me.

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Claudia

2 months ago

The hydraulic model is definitely the way to go for this one. B) behavioral simulation model is my pick.

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Holley

3 months ago

This is tricky! I want to say it's the movement model, but I might be mixing it up with another type of simulation we discussed.

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Ligia

3 months ago

I feel like the answer could be C, but I also recall something about single-parameter estimation models in our readings.

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Mauricio

3 months ago

I remember practicing a question about egress models, and I think they mentioned something about behavioral simulation models too.

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Oneida

3 months ago

I think the hydraulic model is often linked to the movement model, but I'm not entirely sure if that's the right choice here.

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Adell

3 months ago

I'm not super familiar with these simulation models, so I'll need to think through the definitions carefully. Maybe I can eliminate a couple options first before making my final choice.

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Xochitl

3 months ago

This looks straightforward to me. The "hydraulic model" is a type of egress model, so the correct answer has to be C. I'm confident about that.

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Owen

4 months ago

I think the correct answer is C) egress model.

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Bernadine

4 months ago

I'm a little confused by the wording of this question. Can the "hydraulic model" really be considered a "single-parameter estimation model"? I'm not sure about that.

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