Certified Fire Protection Specialist (CFPS) — Question 43

The entrainment of air from the surrounding atmosphere in a rising fire plume has the effect of:

Answer options

• A. decreasing the total mass/volume of the plume, cooling the plume, concentrating the fire products.
• B. increasing the total mass/volume of the plume, heating the plume, reducing the concentration of fire products.
• C. decreasing the total mass/volume of the plume, heating the plume diluting the concentration of fire products.
• D. increasing the total mass/volume of the plume, cooling the plume, diluting the concentration of fire products.

Correct answer: D

Explanation

The correct answer is D because the entrainment of air increases the mass and volume of the plume, which cools it down and dilutes the concentration of fire products. The other options incorrectly describe the effects on mass/volume, temperature, or concentration.