TB 62, 2 inch hi rise hose Flashcards
when connecting to a standpipe outlet when the orfice plate has not been removed, how far should the standpipe outlet valve be opened?
fully
hi rise hose packs consist of?
2 50’ sections of lightweight blue hose
1 1 1/2 complete 200 gpm spray nozzle
5 2’ ladder straps
lightweight blue hose has the ability to resist kinks and can be bent to within? without kinking
12
when the standpipe outlet pressure exceeds what on combined standpipe sprinklers stystems, pressure reducing valves are utilized?
150 psi
when supplying the 75 psi nozzle pressure to the 1 1/2” 200 gpm task force tip, the flow will be?
200 gpm with a friction loss of 35 psi per 100 ft of 2 inch hose
the primary objective of a company assigned to attack the fire is?
get one line into operation
each hi rise hose pack consists of all of the following?
1 1 1/2: complete 200 gpm spray nozzle
one 2 1/2” x 1 1/2” reducer
five 2’ ladder straps
a standpipe system that has 1 1/2” interior wet standpipes of use by building occupants and is supplied by the same riser as a 2 1/2” outlets for fire dept. use best describes?
class 3
the following are advantages of 2” hi rise hose
couplings are tapered to reduce snagging on obstacles
small punctures will not increase in size even under extreme pressure
ability to resist kinks
the primary reason for the pigtail assembly allows a connection to an outlet which is located in a recessed cabinet allowing for operation of two lines off the gated wye. the system described above best identifies what type of standpipe system?
class 3
if you connect to a standpipe outlet with the orfice plate removed, how far should the outlet valve be opened?
one and one half turns and then adjusted
the removal of orifice plates is recommended in order to get the max flow from the outlet. failure to do so will restrict the flow from the outlets to? gpm at a minimum of ?psi residual pressure.
200;50
orfice plates do not regulate? they restrict?
pressure
flow
buildings built since 1974 and are more than 75 feet in height require what type of standpipe system?
combined
the 60 degree elbow on the hi rise hose pigtail assembly would not normally be used on which of the following water systems?
class 2 combination
a class 3 combination standpipe system are found in buildings built between? and ? and over ? feet in height.
1960
1974
150
the annual service test on the 2” hi rise hose is performed as per the instructions for hose testing in volume 3. the service test pressure for 2” hi rise hose is?
300 psi
it is possible that orifice plates will be encountered on the upper floors of a new hi rise construction where the system pressure falls below ? psi. this will typically be located at the ?
150
top 6-8 floors
The 60° elbow on the high-rise who’s pigtail assembly would not normally be used on which of the following water systems?
Class 2
