Ch 17 Collapse Caused By Master Stream Operations Flashcards
What may also come down with the marquee when water accumulates on it? p. 229
Front facade wall
Which of the following cannot be used with the master stream of 1,000 gpm (3 785 L/min) due to the delivery
rate? p. 226
Handheld assists
Which is considered the most important change in the design and use of large-caliber streams? p. 227
It is no longer restricted to the ground
What can happen when a master stream is directed through a
front window of a renovated building that does not have great floor depth?
p. 232
Collapse rear wall
What must interior forces do before a master stream is used to perform temporary knockdown of the fire?
p. 234
Retreat to the floor below
Which of the following is a ground-based master stream? p. 226
Deck Gun
At what rate does the typical master stream deliver water? p. 226
500 to 1,000 gpm
Up to how many times the height of the unstable wall can the collapse zone be set? p. 234
Two
Which of the following is NOT an element to ensure safe transition from interior to exterior attack of a
structural fire? p. 235-236
Pump operator who waits until fire is visible in the windows to begin water flow.
Where should firefighters operate the master stream from when there is a danger of a wall collapsing outward with explosive force? p. 232
Flanking position
Who should determine if it is safe for firefighters to perform overhaul operations after master streams have
knocked down the fire? p. 235
Safety chief
What do firefighters often use when fire spreads through concealed spaces above suspended ceilings in supermarkets and rows of stores?
p. 233
Large-caliber streams
What sound is heard when the master stream hits a brick wall? p. 230
Splattering
How many tons (kg) are being poured into a building every minute when the large-caliber stream is being operated? p. 228
Two to four (1 814 kg to 3 628 kg)
What makes overhauling after master streams have been used to extinguish a fire dangerous? p. 234
Collapse hazard
