BOOK 29 Truck Operations Manual- SMOKE REMOVAL Flashcards
The primary goal of effective ventilation operations is the reduction or removal of what?
Smoke, heat, and fire gasses
What two basic methods are utilized to pressurize a contaminated area?
Natural and mechanical positive pressure
A simple method to NATURALLY ventilate products of combustion is the utilization of natural _______ currents.
Convection
What two methods are utilized to provide pressurized ventilation via portable blowers?
Positive and negative pressure
Negative pressure ventilation the blower is placed ______ of the structure.
Inside
Positive pressure ventilation the blower is placed ________ of the structure.
Outside
Positive pressure is most efficient when the exhaust opening (heat hole, window, door, etc.) is between _____ to _____ the size of the entrance opening.
3/4 to 1 3/4
If it is not possible to utilize the prevailing wind as an advantage, positive pressure has proven effective AGAINST winds (leeward to windward) of up to ___ mph.
25
Due to the size of the pressurized cone, the small 18” blower needs to be moved _____ from entrance openings while the large 24” blowers can be placed ______.
Back, closer
When blowers are placed in series, the blower furthest from the door increases the blower closest to the door capacity by approximately ___ percent.
10%
If two blowers of unequal CFM are utilized in the series position, place the large blower about ___ feet back from the entrance opening and utilize the smaller blower ______ the larger blower to cover the entrance opening with pressurized air.
2 feet, behind
Removal off screens on windows will increase efficiency of ventilation by at least ___%.
50%
500 ppm (parts per million) of carbon monoxide can be inhaled for ___ hour(s) without appreciable effects.
One hour
700 ppm of carbon monoxide inhaled for one hour will cause ____ appreciable effects.
Some
1200 ppm of carbon monoxide inhaled for one hour is ______.
Dangerous
