TB 62 - 2" High Rise Hose Packs Flashcards
This hose is made of a ______
Single jacket construction utilizing nitrile rubber impregnated synethic yarn as the cord material
The hose comes in ______ and is _____ to reduce wear and increase grip.
50’ lengthes with 1 1/2” couplings and is ribbed.
The shoulder of the couplings are _____ to reduce ______.
Tapered to reduce snagging on furniture, door frames and other obstacles.
Is it more susceptible to damage than double jacketed hose?
Yes
Has a tendency to incur _______
very small punctures when used around broken glass and sharp objects.
These punctures will not ______ under extreme pressure.
will not tear or increase in size even
Benefits of this hose is
ability to resist kinks.
Under pressure the hose can be bent to within ____ before it will kink.
12”
Nozzle pressure/ FL/ GPM
75 psi of np / 35 psi of FL per 100’ of 2” hose / 200 GPM
A companys complement will consist of ___
Two complete 100’ hose packs and one pig tail assembly.
Each hose pack consist of :
Two 50’ sections of lightweight blue hose / one 1 1/2” complete 200 gpm spray nozzle / one 2 1/2” x 1 1/2” reducer / five 2’ ladder straps
Pigtail assembly consists of :
One 8’ section of lightweight 2 1/2” hose / one 2 1/2” to 1 1/2” gated wye / one lightweight folding spanner / two ladder straps / one 2 1/2” 60 degree elbow
When making the hose pack place the female coupling of the first section of hose about ____ below the gauge of the bottle.
ten inches and attach the reducer to the female coupling.
When making the hose pack, attach the nozzle and position it at the ______
base of the pack on the same side as the female coupling you began the pack with.
To secure the hose pack, place a strap about _____ above the bottom of the pack on each side.
8 inches.
Placing the straps the 8 inches or so above the folds will help prevent
permanent kinks in the hose.
Inbetween straps are placed at _____ to hold the pack together.
convenient locations
The packs will weight _____ compared to 64 pounds for 100’ of the old 2 1/2” lightweight hose.
38 pounds
Approximate dimensions for single layer pack
40” tall by 22” wide for a single layer pack
Approximate dimensions for a double layer pack
32” tall by 16” wide
Pigtail assembly weights
10 pounds
Assembling the pigtail, it is made by rolling the ____ inside the hose and elbow.
gate wye
Two straps used for?
short strap secures the pigtail capturing the lightweight spanner, longer strap used as a carrying handle.
Combination Class III means
that the 1 1/2” interior wet standpipes for use by the occupants is supplied by the same riser as the 2 1/2” outlets for our use.
Class III may also have 2 1/2” hose with a 1” straight tip in hose cabinets located in _____
stairwells above the fourth floor.
Primary reason we have the pigtail?
The pigtail allows you to connect to the outlet which is located in a recessed cabinet.
Combined Standpipe Sprinkler System use the
Same rise to supply FD outlets and the sprinkler system.
Dry standpipes have outlets that are adjacent to the fire escape or in an enclosed stairwell to meet
seismic criteria
Extending off of 1 3/4” friction loss will be
50 PSI per each 100’ of 1 3/4”
Extending off of 1 1/2” friction loss will be
Approximately 130 PSI per each 100’ of 1 1/2”
Orifice plates are used to reduce
the flow of water supplied from a particular outlet.
Size of orifice is determined by
the static pressure on the supply side of an outlet
Due to gravity’s effect on the water, the higher pressures will be found on the
lower floors of a building.
Orifice plates do not regulate pressure , it ____
restricts flow
Orifice plate locations:
Soldered to the outlet / behind the gasket on the drip cock / soldered to the male end of the drip cock / behind the gasket on the 2 1/2” hose
Removal of the orifice plate is ____
recommended to get max flow
Orifice plates are designed to restrict flow to
200 GPM at a minimum of 50 psi residual pressure.
Hose lay : FF attaches the pigtail assembly _______ to the outlet and then the female hose coupling to the wye.
without the elbow.
If orifice plate has been removed, the outlet should be
opened one and one-half turns, then adjusted from there
If orifice plate has not been removed, the outlet should be
opened fully
Removing the orifice plate will allow the gate valve to used as an
adjustable orifice plate
Pressure Reducing Valve found when
the pressure exceeds 150 PSI
It is possible in new construction to encounter orifices plates on the upper flows where the system pressures falls below
150 PSI
On combined standpipe sprinkler system you can find orifice plates on the
top 6 to 8 floors
After each use __
scrub the outlet jacket to free it of dirty and fire debris
Service test pressure for the hose is
300 PSI
