Flashcards

ventilation

Jake U Inglês 10 flashcards

Flashcards do conjunto (10)

1deciding where to ventilatelocation of fire
location of occupants
interior and exterior exposures
which direction you wish to draw the fire
direction of wind
existing openings
available personnel and equipment
type of construction
purpose or use of occupancy
2locating a fire (3)Size up
Reading smoke condition
Thermal imaging camera
3means of ventilationmechanical, natural, hyrdaulic
4types of roof openingskerf cuts - slot cuts to determine direction of fire spread
inspection cuts - small triangles
louvered cuts - large rectangular openings
5PPVmechanical means to pressurize compartment to push smoke/heat out through another opening
6disadvantages to NPV-equipment blocks access/egress
-must enter structure to intiate
-not effective in hi ceilings
-less adaptable to situation
-reqs special equipment
-equipment exposed to contaminants
7how much should hydraulic ventilation cover of window85-90 percent of window
- fire must be under control first
8natural stack effecthotter air inside, cooler outside
9reverse stack effectcooler air inside, hotter air outside
10mushroomingdownward migration due to physical barrier