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25 Cards in this Set

  • Front
  • Back
which turret typically delivers the agent at a flow rate that ranges from 500 to 1500 gallons per minute?
which turrent typically delivers agent at a flow rate of 250 gpm?
an average handline is expected to operate at or around how many gpm?
100 gpm
what is most of the initial on-board supply of water on an ARFF apparatus used for?
to produce enough foam to create the initial rescue pathway
what are the two types of water sources that can be used for replenishing your ARFF?
1)static water sources
2)pressurized water sources
of the two types of water sources used to replenish the ARFF apparatus which is more commonly used?
pressurized water source
what are the two types of foam proportioning found on the ARFF?
1)low-energy systems
2)high-energy systems
of the two types of ARFF foam proportioning ystems which is more commonly found on structural and wildland fire apparatuses?
high-energy systems
in low-energy proportioning systems when is the air introduced to the foam/water solution?
at the nozzle or immediately after the solution is discharged from the nozzle
in high-energy foam proportioning systems when is air introduced to the foam/water solution?
before it is expelled from the nozzle
what type of high-energy system maybe used in ARFF applications?
compressed air foam system
what are the types of foam proportioning methods for low-energy proportioning systems?
1)variable-flow, variable-rate direct-injection
3)installed in-line eductor
4)around-the-pump proportioner
5)batch mixing
how is batch mixing low-energy proportioning accomplished?
foam concentrate is poured directly into the water tank
what types of foam concentrates can you perform batch mixing with?
2)CLASS A foam concentrates
what are some disadvantages to the batch mixing method?
1)the entire on-board water supply must be discharged as foam
2)the water tank can not be continuously refilled
3)the water tank must be empty before a new "batch" of solution can be made
in a installed in-line eductor low-energy system where is the eductor attached?
directly to the pump discharge or on a handline
when using a around-the-pump proportioner how is the foam concentrate drafted into the water stream?
an eductor
what are the two types of balanced-pressure systems used in ARFF operations?
1)bypass-type balanced-pressure systems
2)demand-type balanced-pressure system
when using the balanced-pressure foam proportioning system how is foam concentrate introduced into the water stream?
by a foam concentrate pump
how is foam pressure controlled in demand-type balanced-pressure foam proportioning systems?
by a hydraulic pump
when using a bypass-type balanced-pressure foam proportioning system how is foam pressure controlled?
by a diaphragm valve that routes excess foam concentrate back to the tank
what are some advantages to the balanced-pressure foam proportioning system?
1)there is no water intake pressure limitation
2)water and foam can simultaneously be discharged from separate outlets
3)various percentages of foam solution can be discharged from multiple discharge outlets
what is the purpose of a multimetering valve control?
controls how much foam concentrate is released into the system depending on the outlets that are in use
what type of foam proportioning system utilizes a multimetering valve?
installed in-line eductor system
what two foam proportioning systems or methods include both a water pump and a foam pump allowing water and foam to be discharged simultaneously from different outlets on the ARFF apparatus?
2)variable-flow, variable-rate direct-injection