TB 62 - 2 Inch High-Rise Hose System Flashcards
HR hose is MORE susceptible to DAMAGE than double jacketed hose as it has a tendency to?
-incur very small punctures when used around broken glass and sharp objects.
(however, these punctures WILL NOT tear or increase in size EVEN UNDER extreme pressure.)
A benefit of the HR hose, especially when working in the confined spaces of stairwells and interior hallways, is its ability to resist kinks.
Under pressure, the hose can be bent to within _______ inches before it will kink.
12 inches
A company’s HR hose compliment will provide the option of laying a single line of uniform size 200 feet in length delivering _____ gpm or two lines 100-feet in length delivering a total of _____ gpm.
-1 line 200 gpm
- 2 lines 400 gpm
Assembling the Hose Packs
- The single layer method produces a pack _____-inches taller than the double layer method.
- Considerations for using either the single or double layer hose pack can be based on?
- 8 inches
- Compartment space and Company preference.
When assembled, the packs weigh ____ pounds
The approximate dimensions will be:
•40” tall by 22” wide for the single layer pack
•32” tall by 16” wide for the double layer pack.
38lbs
What is the primary reason for carrying the eight-foot 2- 1/2” hose in the pigtail?
Hose cabinets located in the STAIRWELLS above the fourth floor in buildings built between 1960 and 1974. These had the Combination (Class III) Standpipe System
(The pigtail allows you to connect to the outlet in a recessed cabinet and then operate two lines off the gated wye in order to maximize the available water from the outlet.)
If you need to extend off a drop bagged line with a 2” hose pack, your friction loss will be:
50 psi per each 100 ft of 1-3/4”
____ psi per each 100 ft of 1-1/2” line
-130 psi (very high)
(Keep in mind that your 2” hose pack has the same 200 gpm nozzle that the 1-3/4” line does.)
Very often, the best way to get a line on a fire in a Pre-60 high rise with Class 1 Dry Standpipes is to?
drop bag a 1-3/4” or 1-1/2” hand line directly from your apparatus.
Utilizing the pigtail assembly on different standpipe systems:
Pre-60 Dry standpipes:
-OUTSIDE: use pigtail hose to bring gated wye to fire escape balcony.
-INSIDE: connect elbow (pointed down) and gated wye directly to outlet inside stairwell.
Combination Standpipe System:
-CABINET (above 4th floor): connect pigtail hose to outlet and gated wye to pigtail.
Combined Standpipe Sprinkler System
-Connect elbow (pointed down) and gated wye directly to outlet
1960 - 1974 Combination Standpipe Systems
The orifice plate can be found at one of the following locations:
• Soldered to the outlet itself (use slotted screwdriver or channel locks to remove)
• Behind the gasket on the drip-cock (replace gasket after removing orifice plate)
• Soldered to the male end of the drip-cock (use slotted screwdriver or channel locks to remove)
• Behind the gasket on the 2-1/2” hose (replace gasket after removing orifice plate)
Orifice Plates
Removal of the orifice plate is recommended in order to get the maximum FLOW from the outlet.
Failure to do so will restrict the flow from the outlet to _____ gpm at a minimum of _____ psi residual pressure.
-200 gpm at 50 psi
(Different PSI than stated in Bk100 = 45PSI)
1960 - 1974 Combination Standpipe Systems
If the orifice plate has NOT been removed, OPEN THE VALVE FULLY.
If the orifice plate has been REMOVED, the outlet should be opened ______ turns, then adjusted from there. Removing the orifice plate will allow the gate valve to be used as an adjustable orifice plate.
-one and one-half turns
(Have a member assigned to stay at the gate valve throughout the firefighting operation to insure no one accidentally adjusts your outlet.)
If conditions in the stairwell will not allow you to connect to the standpipe on the fire floor, you can connect on the floor _______ (above or below?).
floor below
Post-74 Combined Standpipe Sprinkler System
The hose lays will be the same as with a Combination Standpipe Sprinkler System with the difference being the ______.
outlet valve. (Utilizes Pressure Reducing Valves)
Post-74 Combined Standpipe Sprinkler System
After making connections, how much should the Pressure Reducing Valve (PRV) be opened?
-Opened fully
(Failure to open the PRV fully will result in severely reduced flow.)
