Chapter 25 SPRINKLERS FIRE DETECTION ALARM PANELS ELEVATOR OPERATION Flashcards
(41 cards)
What is the minimum pressure that must be supplied to the highest sprinkler head in a building
residual pressure of 100 kPa (15 psi).
What does FDC stand for and what is it used for in relation to sprinklers
Boosting Water Supply by tying into the Standpipe/Sprinkler Connection
(FDC-Fire Department Connection)
What are the advantages of an automatic sprinkler system (6) (not bolded)
Most reliable fire protection device
Rarely fail to operate
Control or extinguish 96% of fires
Create less business interruption and water damage
Enhance life safety
Reduce insurance costs
What are some reasons automatic sprinklers fail (6) (not bolded)
Partially or completely closed water main valve
Interruption in the municipal water supply system
Sprinkler heads were damaged or painted over
Broken pipes
Debris or sediment in the pipes
Vandalism
Automatic sprinkler systems are designed, installed and maintained to perform four basic functions
in the event of a fire, What are they?
detect a fires presence
alarm or transmit a signal to agencies indicating alarm is activated
control growth of the fire
extinguish the fire completely
What are the 5 methods for detecting fire
Fixed Temperature Detection
Rate of Rise Detection
Smoke Detection
Flame or Flash Detection
Vapor Detection
Alarms can be divided into two categories What are they?
Hydraulic Alarm
Electric Alarm
Types of Sprinkler Systems (6)
Wet-Pipe
Dry-Pipe
Pre-Action
Deluge
Residential
Special Extinguishing Systems
What is the difference between older and newer wet pipe sprinkler systems (not bolded)
Older versions of this system have an alarm check valve installed in the main riser next to where the feed main enters the building.
New versions of this type of system may not have an alarm check valve, but have a backflow prevention check valve instead - a “straight stick” system.
In a wet pipe system the F.D.C. ties-in above the _______ _______ _______
main control valve
In a dry pipe system the F.D.C. ties-in before the _______ _______ _______
dry pipe valve
What are the types of Special extinguishment systems
FM-200 TM, Halon, Dry Chemical, CO2 Systems
Sprinkler Head Mechanisms (4)
Fusible Link - Standard
Fusible Link - Quick Response Type
Frangible Bulb
Chemical Pellet
Sprinkler Orientations (3)
Pendant Orientation
Upright Sprinkler Orientation
Sidewall Sprinkler Orientation
Common Control Valves for sprinklers
Outside screw and yoke valve (OS&Y)
Post indicator valve (PIV)
Wall post indicator valve (WPIV)
Post indicator valve assembly (PIVA)
A __________ __________ (according to NFPA) is “An arrangement of piping, valves, hose connections and allied equipment installed in a building or structure.
STANDPIPE SYSTEM
A __________ is the riser portion of the system piping that delivers the water supply for hose connections and sprinklers on combined systems vertically from floor to floor.
STANDPIPE
What is the purpose of the standpipe system
The purpose of the standpipe system is to shorten the length of supply and fire attack hose lines.
Classes of Standpipe Systems (3)
● Class I - provides 65mm hose line connections to supply water. These are usually found in the stairwells of the high rise structure or at dedicated areas within a warehouse.
● Class II – provides 38mm hose cabinets containing pre-connected hose that may be used by either occupants or firefighters.
● Class III – provides both a Class I and Class II standpipe system – hose cabinet and standpipe connection. The 65mm connection may be in the stairwell or found in the hose cabinet.
When using a standpipe system what is the policy of Edmonton fire
Our department’s policies concerning standpipe use in high rises states the hook-up of the fire attack hose lines shall be the floor below the fire floor using our HIGH-RISE KITS.
3 Main Types of Standpipe Systems
● Dry system – not filled with water until needed in firefighting. Used only by firefighters. Must be manually charged by the fire department.
● Wet system – the standpipe is filled with water and is pressurized at all times.
● Wet/Dry Combination system – Portions of the system are pressured with water and other portions are pressured with air.
Subsections to the 3 main types of standpipe systems: (not listed in Ch. 17)
- Automatic-wet systems
- Automatic-dry systems
- Semi Automatic-dry systems
- Manual-dry systems
- Manual-wet systems
What is the initial discharge pressure for sprinkler and standpipe systems
Confirm the floor level in order to provide the proper head pressure to the system.
Initial discharge pressure at 1000 kPa for sprinkler and standpipe systems, allowing for 35 kPa per floor to overcome head pressure above the fifth floor.
What is the maximum pressure for standpipes and sprinklers?
Maximum pressure for standpipes is 2100 kPa, and 1050 kPa for sprinklers.
