Fire Safety Flashcards
What are the 7 main culprits of bad IAQ?
Combustibles VOCs Standing Moisture Formaldehyde Poisons Particle board
What are the 3 classes of standpipe? Describe them.
Class 1: equipped with 2.5 inch outlets. To be used by fire dept only. Dry system Class I (Dry Standpipe): used by fire department only. • Dry system without a directly connected water supply, 2.5” outlets, • Located at every level of a building within stairway enclosures or within the vestibule if exit enclosure is pressurized • Must be used when any portion of a building interior is more than 200 feet of travel from the nearest point of fire department access • Used in buildings with more than three stories, and shopping malls • If more than 75’ above grade, the pipe connection must be provided in every required stairway as well • Ball Drip used to insure the standpipe remains dry • Won’t freeze or rust Class 2: used by occupants before the fire department arrives • Wet system directly connected to water supply system • Equipped with 1.5” outlets and hoses for occupant use • Required in buildings 4 or more stories tall, theaters, assembly spaces, B, H, I, M, and S occupancies • Every point of the building must be within 30’ of the end of a 100’ hose attached to an outlet • Must be designed to supply at least 35 gpm at 25 psi for at least 30 minutes • Water system must be designed to provide 70 gpm at 25 psi for 30 minutes Class 3: used by both occupants and fire department • A combo system directly connected to a water supply with both 1.5” and 2.5”outlets • Installed in buildings where the highest floor level is more than 30’ above the lowest level of fire dept. access • Every point of the building must be within 30’ of the end of a 100’ hose attached to an outlet • Installed in buildings where the highest floor level is over 30’ above the lowest fire department vehicle access, or where the lowest floor level is 30’ below the highest fire department vehicle access • Exception to use a Class I Standpipe Are: • Buildings equipped with a sprinkler system • Open parking garages less than 150’ tall • Open parking garages subject to freezing temperatures • Basements that are sprinklered
Which of the following types of standpipe connection are intended for use by building occupants? A. Class I only B. Class II only C. Class I and Class II only D. Class II and Class III only
D Class II and Class III only
- Which electric feeder has highest total first cost, but lowest labor cost? a) Cable tray b) Wire and conduit c) Busduct d) Cablebus
c) Busduct
Where are fire detectors required?
Near fire doors, exit corridors, hotel rooms, bedrooms, public places of assembly
What are the types of fire detection devices?
Ionization detector: responds to products of combustion-ionized particles rather than smoke; photoelectric detectors: respond to smoke which obscures a light beam; rise of temperature detectors: responds to precense of heat and triggers when a temp is reached;
What is the principal advantage of dry- type transformer? a) Low voltage b) Ease of installation c) Low noise d) Small size
b) Ease of installation
True of false. Dry-pipe sprinkler systems are most efficient than wet-pipe systems/
false
True or false. Siamese connections serve both sprinklers and standpipes.
true
True or false. The hazard classification does not necessarily affect sprinkler layout.
false
True or false. Standpipes must be provided within stairways or within vestibules of smoke proof enclosures.
true
True or false. Standpipes are required in building four or more stories high and those exceeding 150 ft.
true
True or false. Sprinkler piping can be either copper or plastic.
true
The normal concentration of oxygen in air is:
21%
Evacuation and fire protection in high-rise buildings can be problematic because fire fighting equipment cannot usually reach higher than:
90 ft (27m)
Exterior fire escapes are generally no longer permitted because:
smoke plumes rising from exterior windows can redner these devices unusable early in a fire
n order of importance, it is most important to fire-protect:
columns, girders, beams, floor slab
CoGiBeFl
Supplying fresh air to a smoke-free stair entirely from the top or bottom is not advisable because:
It is too likely that open doors near the source would deplete fresh air for the rest of the stair
Sprinkler and smoke removal systems are sometimes at cross-purposes because:
the buaoncy of smoke is reduced by cooling water
In a reinforced-concrete building, reinforcing rods can be used as lightning conductors only if:
the rods are welded, not tied
What is a standard temperature for fusible link activation?
165 deg F is most comon
What are the 3 things a fire needs?
fuel source
high temperature
oxygen
