Structural Firefighting

Question 1

What does RECEO stand for?

Answer 1

• Rescue
• Exposures
• Containment
• Extinguishment
• Overhaul

Question 2

What are the 4 stages of combustion?

Answer 2

1. Incipient - No visible smoke or flame.
2. Smouldering - Smoke visible.
3. Flame - Actual fire now exists.
4. Heat - Appreciable heat now exists and fire develops.

Question 3

What are the 4 stages of a compartment fire?

Answer 3

1. Developing stage
2. Flashover stage (transitional)
3. Fully developed stage
4. Decay stage

Question 4

These are the factors to consider prior to entry? (BSAHF)

Answer 4

• Building
• Smoke
• Air track
• Heat
• Flame

Question 5

What are the 3 main types of extreme fire behavior (EFB)?

Answer 5

• Flashover
• Backdraught
• Fire gas ignition

Question 6

What is pyrolosyis?

Answer 6

The decomposition of a substance through application of heat.

Question 7

What is the expansion rate of water to steam at 100 degrees C?

Answer 7

1:1700

Question 8

In which ways can heat be transferred?

Answer 8

• Conduction
• Radiation
• Convection
• Direct burning

Question 9

What does the flammability range (LEL - UEL) refer to?

Answer 9

It is the range in which a gas or vapour will burn or explode if an ignition source is present.

Question 10

What does it mean when the gas/vapour concentration is below the LEL

Answer 10

Too lean to burn.

Question 11

What does it mean when the gas/vapour concentration is above the UEL?

Answer 11

Too rich to burn.

Question 12

What are the 3 key methods of extinguishment?

Answer 12

• Direct attack
• Indirect attack
• Gas cooling (short pulse, long pulse)