Chapter 12 Relay Pumping Ops Flashcards Preview

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Flashcards in Chapter 12 Relay Pumping Ops Deck (15):

A relay pumping operation consists of:

A pumper positioned at the water supply pumping and pressurizing water through a supply to another pumper that repressurises and so on until it reaches the attack pumper

Pg 425


In oder to be effective relay operations require:

Preplanning, training, and coordinating of all participants

Pg 425


Water supply pumper in relay pumping:

Should have the largest pumping capacity. This pumper takes water from the hydrant or static source and pumps it to the next relay pumper.
Pg 426


Relay pumper:

Receives water from another pumper, raises the pressure and supplies it to the next apparatus

Pg 427


Fire attack pumper:

Pumping apparatus located at the fire scene that receives water from the relay and is responsible for supplying the attack lines and appliances required for suppression

Pg 427


Basically the need for relay pumping is determined by the:

Amount of water required at an incident and the distance between the incident scene and the water source

Pg 427


If flow through a relay needs to be increased it can be done in 3 ways:

Increase the diameter of the supply hose or add more supply lines
Increase the pump discharge pressure
Add more pumpers to the relay to overcome friction loss or elevation loss

Pg 428


Increasing flow during a relay operation may e accomplished by:

Placing additional pumpers in the system

Pg 428


The overall capacity of a relay system is determined bye the:

Smallest pump and the smallest diameter of hose used in the relay

Pg 432


When laying long distances the hose lay between each pumper should be:

As equalized as possible

Pg 432


It is advisable or a driver to maintain an intake pressure of ____ to _____ psi as a relay pumper


Pg 433


Once the relay operation is flowing water at the desired pressure the driver of the attack pumper should:

Set the pressure governor at an appropriate level
Pg 433


Apparatus equipped with pressure governors should be set in the_______ mode when acting as the attack pumper and in the________ mode while working as a relay pumper


Pg 433


When the need for relay pumping has ended the operations should be discontinued from the:

Fire scene first

Pg 434


Open relay method consists of:

Deploying portable folding drop tanks at each intake for pumpers in the relay operation

Pg 435