Installed Fire Safety Sytems Flashcards
(15 cards)
Describe the function of the Control and Indicating Equipment (CIE).
- Positioned adjacent to the FIP and is use to control all the smoke spill fan and air handling systems within the complex
Describe four features of a hose reel (installed in buildings).
- Usually located within four metres of an exit
- Can be in various strategic sites, dependent upon where they are to be used
- Can be mounted using a fixed or swinging drum arrangement
- Hold a maximum of 36m of 19mm black rubber hose
- Have a working pressure that may be up to 1MPa
(fill in the blanks)
All sprinkler systems, except drencher systems with less than ____ heads, are required to have a booster connection installed. The booster connection is to be located within ____ metres of a hard standing surface accessible by a fire brigade pumping appliance. It is also necessary to provide a feed fire hydrant within ____ metres of the hard standing surface above.
- 12 heads
- 8m
- 20m
State the three reasons for maintaining a tenable atmosphere in exit routes?
- Evacuation purposes
- Prevent the spread of smoke to other floors
- Assist firefighting operations
Describe the Automatic Evacuation Sequence of floors within a building over 25m in height and associated tones for each level.
- 1; affected level = evacuate tones
- 2; two levels above = alert tones
- 3; one level below = alert tones
- 4; other levels = if the alarm continues for a set period, the evacuation tones continue to cascade in both directions
Explain the difference between photoelectric and ionisation type smoke detectors?
- Photoelectric detectors operate on the scattering or absorption of light by smoke particles in a light beam; they respond quickly to larger smoke particles and are suitable for general application
- Ionisation detectors operate on the change in current flowing through an ionisation chamber upon entry of smoke particles; they respond quickly to smoke containing small particles normally produced by clean burning fires but may respond slowly to optically dense smoke containing large particles
How would you identify a Floor warden?
- Usually wears a yellow helmets
How would you identify a Chief warden?
- Usually wears a white helmet
Describe the advantages and disadvantages of using thermal detectors in a private, residential kitchen?
- Advantages; Advantage over smoke detectors because smoke is often unavoidable in kitchens
- Disadvantages; Only once the flaming stage has been reached that heat detectors operate. Unwanted alarms can be generated due to detectors that sense a quick rise in temperature being installed in environments with fluctuation temps (i.e. kitchens - a fixed temperature detector should be used over a rate of rise detector)
What five roles should a workplace emergency control organisation consist of?
- Chief Warden
- Deputy Chief Warden
- Communications Officer
- Floor Wardens/Area Wardens
- Wardens
What is the size requirement for the lettering on internal hydrants?
- No smaller than 50mm
Describe the purpose of a booster connection.
- Allows firefighters to regulate pressure and flow to a system of attack fire hydrants from a safe, remote point with a minimum number of FRS pumping appliances.
- Booster connections also allow firefighters to apply additional pressure to a sprinkler system should the system pressure drop to a point where the heads run (stream) rather than spray
There are eight (8) requirements for sprinkler valve locations as described in Australian Standard AS 2118.1 - 2017: List four (4) of them.
- In general, should be located at ground level or not more than one level above or below ground level
- All valves must be located in a secure room or enclosure, preferably adjacent to the main entry to the building
- If the enclosure is located outside the building, it must be weatherproof and not more than 25m from a door that gives access to the protected building
- The access way must be protected by construction that can be sealed from smoke and heat
- Only approved equipment can be installed within the sprinkler room, no other materials should be stored in there
What is High Expansion (Hi-Ex) Foam and what is the typical ration it operates at?
- Foam that has a greater expansion ratio than a low expansion system
- Typical hi-ex foam operates at a 1000:1 ratio
Describe the purpose of an EWIS.
- To enable an orderly evacuation of the building
- Once occupants have been evacuated, the EWIS can be used by responding firefighters to coordinate emergency operations and as a secondary means of communication
