Compartment Fire

Question 1

What is the definition of a compartment?

Answer 1

An enclosed space within a structure

Question 2

What is the expansion rate of water turning to steam?

Answer 2

1700:1

Question 3

Water turns to steam at what temperature?

Answer 3

100°C

Question 4

Name the three types of water application?

Answer 4

Indirect Direct Gas cooling

Question 5

What is indirect water application? Branch settings and effects

Answer 5

Water is directed from outside the compartment Medium spray aimed above and around the fire Cools and dilutes the fire gases Large quantities of steam are produced, smothering the fire and lowering the neutral plane

Question 6

What is direct water application? Branch settings and effects

Answer 6

Water is directly applied to the seat of the fire Solid jet or narrow spray Extinguishes fire, but with potential for excessive water damage

Question 7

What are the three types of pulse that can be used to cool fire gases, and extinguish the fire?

Answer 7

Short pulse - provides a safe zone Long pulse - extinguishes flaming combustion in the overpressure Painting - extinguishes the fire, small trickles of water

Question 8

When should teams decide to withdraw? Five answers

Answer 8

Rising temperatures Unable to extinguish the flames in the gas layer Descending neutral plane Increased fire development Reduced visibility

Question 9

1mm droplets from water spray will cool a tract of how many mm?

Answer 9

3mm

Question 10

What distance should hose management crews keep behind the firefighting crew?

Answer 10

One compartment behind at all time, to remain in audible contact with them if possible Hose is cooled or laid in loose bights