Chapter 11/12 Flashcards
Fire departments also use flexible ducting that is up to __ inches in diameter, and is made of smooth, translucent plastic.
24
The most significant difference between telescoping doors and other types of service doors is that telescoping doors consist of two layers (skins) separated by at least __ inches of air space. From the bottom of the door, the space between the inner and outer skins becomes progressively larger toward the top of the door. Depending upon the size of the door, the space between the inner and outer skin can be more than __ inches.
2
13
Exterior masonry walls usually range from __ inches or more in thickness, depending upon the material used.
8 to 12
Veneer-over-frame walls. These walls are essentially frame walls in which __-inch or __-inch wood or metal studs are covered with a layer of plywood or oriented strand board (OSB) for shear strength.
2x4
2x6
For PPV, blowers are set up about __ feet outside the point of entry into the building so the cone of air they create completely covers the inlet opening.
6
Compared with mechanical smoke ejectors, fog streams are capable of removing __ times more smoke, depending on the type and size of the nozzle, the angle of the spray pattern, and the location of the nozzle in relation to the ventilation opening.
two to four
Hydraulic Ventilation:
A fog or spray stream directed through a window or doorway with a __-degree pattern covering __ percent of the opening provides the best results for ventilation
60
85 to 90
Hydraulic Ventilation:
The ideal nozzle position will vary, but in most cases it should be about __ feet inside the room being ventilated. Regardless of the size of the opening, the spray pattern should not exceed __ degrees because it will lose efficiency at greater angles.
2
60
