Deck 1

Question 1

What are the benefits of water as an extinguishing media

Answer 1

Dilutes gas
Reduces heat
Steam, drives out existing gasses
Absorbs heat
Absorbs latent heat
Steam limits oxygen reaching the fire

Question 2

What is a flashover

Answer 2

A sudden and sustained transition of a ground fire into a fully developed fire.

Question 3

What is a backdraught

Answer 3

A Deflagration, caused by air being introduced to a fire compartment that is oxygen starved,
Has limited ventilation
And where there is a build up of unburnt fire gasses

Question 4

What is fire gas ignition

Answer 4

A sudden Deflagration caused by the ignition of fire gasses that have accumulated outside the compartment

Question 5

What are the external signs of backdraught

Answer 5

Fire with limited ventilation
Fire has been burning for some time
Fire gasses being pushed out through gaps under pressure 
Blackened windows with no visible flame
Fire gasses pulsing through gaps

Question 6

What are the internal signs of backdraught

Answer 6

Low neutral plane
Darkening of fire gasses
Inrush of air, fire gasses forced out
Pulsation of gasses through the opening
Deflagration through an opening

Question 7

Carbon monoxide and hydrogen

Answer 7

12%
29%
76%

Question 8

4 emergency procedures available to wearers

Answer 8

Bodyguard DSU
Entrapment procedure
Mutually exchange air
Call for radio assistance

Question 9

Why would you cut away

Answer 9

To investigate a fire, or locate and extinguish an innaccessible fire

Question 10

IC’S Assessment of fire compartment must include

Answer 10

Size and layout
Location and access
Probable fire loading based on available information
Size of fire, fire development, growth and fire behaviour