Types of Ventilation First name:   Last name:   1 Mechanical ventilation uses mechanical means to augment natural ventilation.  There are different methods of mechanical ventilation. negative pressure smoke ejectors positive pressure ventilation fans fire streams to create pressure differentials all of the above are methods of mechanical ventilation 2 A contaminated atmosphere also may be any dangerous or undesirable atmosphere not caused by a fire.  This can include: natural gas carbon monoxide ammonia all of the above 3 You should always open windows on the windward side of a building to keep fire from entering areas that are uninvolved by fire. True False 4 Hydraulic ventilation uses the water from the hose line to exhaust smoke and heated gases from a structure. True False 5 When referring to ventilation techniques, firefighters use the term contaminated atmosphere to describe the products of combustion that must be removed from a building. True False

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