high rise office Flashcards
After fire floor has been determined the hvac zones serving other floors shall have what done?
After the fire floor has been adequately determined, all HVAC zones that do not include the fire area shall have their supply fans activated. This will supply fresh outside air to these zones, pressurizing these zones and limiting the spread of smoke. It will also supply fresh outside air to any occupants on the floors in these zones.
How do you place HVAC systems in non circulating mode?
All the HVAC systems shall be placed in the non-circulating mode by:
A. Opening all outside air supply dampers.
B. Closing all mixing dampers.
C. Opening all exhaust dampers. (Figure 2)
What are the requirements for installation of fire pumps under the 1968 code and under the 1938 code?
B. The 1968 Building code requires a manual fire pump to supplement the standpipe system in buildings over 300 feet high. The 1938 Building Code requires a manual fire pump in buildings over 250 high.
What is an easy way to determine the discharge gauged on manual fire pump?
C. Locate the bypass valve (B) on the discharge side of the fire pump. The discharge side can be readily identified by examining the gauges. The discharge gauge is calibrated for higher pressures than the inlet gauge.
What position should the bypass valve be in?
D. The bypass valve should be in the closed position (stem in).
If bypass valve is left open, how much will the efficiency of the pump be affected?
The efficiency of the pump will be affected if the bypass is open. A loss of 25% can be expected in an 8” riser and a loss of 45% can be expected in a 6” riser with the bypass open.
Note
You must notify building engineer if you were unable to determine bypass valve and therefore are unsure if it is open or closed.
What is the fours yep procedure to start fire pumps?
Four step procedure for starting of fire pumps using the control panel. Remember acronym Kansas City baseball league.
OPERATION LOCATION
A. Close knife switch (1) to on position. (Figures 9, 10)
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B. Close circuit breaker(s) (2) & power on light will glow.
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C. Push starting button (3) & pump on light will glow. (Figures 9, 10)
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D. Move selector lever (4) to desired position increasing pump speed and thereby increasing pressure.
The fire pumps should now be operating. If they have failed to start, the emergency power lever located at the panel shall be used. Push or pull to “on” position (5). (Figures 9, 10)
What are the recommended pump discharge pressures?
4.1.7
Recommended Pump Pressure FIRE FLOORS PUMP DISCHARGE PRESSURE Floors 1 to 10 150 psi Floors 11 to 20 200 psi Floors 21 to 30 250 psi Floors 31 to 40 300 psi Floors 41 to 50 350 psi Floors 51 to 60 400 psi Floors 61 to 70 450 psi Floors 71 to 80 500 psi Floors 81 to 90 550 psi Floors 91 to 100 600 psi
How do you shut down the pumps?
K. When the command to shut down the building fire pumps is received, and the engineer in charge is not available, the pumps are deactivated by reversing the starting procedure.
- Return pump position lever to lowest speed.
- Push “off” button.
- Open circuit breakers.
- Open knife switch (off position).
What should be pressure be at the highest floor house outlet?
The building fire pumps shall be capable of delivering their rated capacity at a pressure of 50 psi at the highest floor hose outlet.
A relief valve is required at the fire pump limiting the pressure to 15 psi above that required to deliver its rated capacity at 50 psi to the highest floor outlet.
When shall a1076 be transmitted?
When shall a second alarm be transmitted?
A. A 10-76 signal shall be transmitted when a report of fire is confirmed.
Any fire in a high-rise office building which requires the stretching and operating of one hoseline will necessitate the use of All Hands.
B. A second alarm is warranted for any visible fire or smoke emanating through the exterior skin of the building or when a serious fire has been verified.
Where does the third due ladder operate at a high rise office fire?
- The third arriving ladder company shall be assigned to search and evacuate the floor above the fire.
Where does the fourth due ladder-operate at a high rise office fire?
- The fourth arriving ladder company shall be assigned similarly, to operate on the upper floors and to initiate the search of the attack stairway.
When would a fire branch generally be implemented to maintain control?
A rapidly expanding incident often presents span of control issues. These types of incidents require increasing numbers of units to be assigned. A Fire Branch may be implemented to address these span of control issues. Generally a Branch would be activated on the 2nd alarm.
How may the second hose line be used ?
Considering all the above items, the placement of the second line may be used to:
A. Reinforce the position of the first line.
B. Protect the position of the first line.
C. Protect the search and evacuation of the fire floor.
D. Contain and confine fire spread and/or prevent fire from wrapping around the core and endangering operation of the first line.
Who controls all horizontal ventilation tactics at a 1076?
All horizontal ventilation tactics shall be controlled, communicated and coordinated by the IC.
What shall the fire sector/branch be equipped with?
- SCBA for all personnel required for the operations of this sector/branch.
- Copy of the floor plan.
- Fire Sector/Branch log. (Figure 14)
- Post Radio
In ICS who do leaders operate under and who do supervisors operate under?
Why are branches formed?
NOTE:
ICS Note
Leaders operate under Supervisors and Supervisors operate under Directors.
ICS Note
Branches are formed to address span of control issues. A Group Supervisor can supervise 3-7 units. If more units are used, a Branch should be established, and groups or sectors assigned to that Branch.
