Chapter 11 Operating Fire Pumps Flashcards Preview

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Flashcards in Chapter 11 Operating Fire Pumps Deck (70)
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The process of making the fire pump operational may also be called:

putting the pump into gear.


The process for making the fire pump operational begins:

after the apparatus has been properly positioned and the parking brake has been set.


On the majority of apparatus, the procedure for making the pump operational takes place:

before the driver/operator exits the cab.


Except when the apparatus is used for pump-and-roll operations, what is the next step after the driver/operator exits the cab?

Chock the apparatus wheels.


When does IFSTA recommend that the apparatus wheels be chocked?

Every time the apparatus is stopped with the engine running and the driver/operator exits the cab


What are the two basic pressurized water supply sources used to supply a fire pump?

A hydrant and a supply hose from another fire pump


Negative pump pressure is also called:

a vacuum.


When operating at negative pump pressure, as the volume from the fire pump increases, the incoming pressure from the supply source may:



Which of the following is a danger of operating at negative pressure from a fire hydrant?

A. Increases the possibility of damage to the source pumper due to cavitation*
B. May make it necessary to make a later transition to a static supply source
C. Can cause water to enter the pump with too much pressure from the source
D. Can cause supply hose to collapse, resulting in interruption of water supply


Which of the following is a danger of operating at negative pressure from another pumper?

Can cause supply hose to collapse, resulting in interruption of water supply


The best hydrants are located:

on large water mains that are interconnected in a grid pattern.


The worst hydrants typically are those located:

on dead-end mains.


Which of the following commonly become clogged with sediment and encrustation, further reducing their capacity?

A. Dead-end mains
B. Open-ended mains
C. Single mains that supply small amounts of water*
D. Large water mains that are interconnected in a grid pattern


Which of the following is NOT a way in which reliability of hydrants can be found?

A. Fire departments should have access to water department records.
B. Apparatus may be equipped with map books with hydrant information and locations.
C. Fire hydrants may be color coded to indicate the flow that can be expected from them.
D. A pumper should be hooked up as quickly as possible to test the flow rate of each hydrant.*


Once a hydrant has been selected, the pumper should be hooked to it as quickly as possible, using either:

a forward or a reverse lay.


One possible problem with a forward lay depends on:

the distance from the hydrant to the fire and the length of the hose carried on the engine.


Many departments that prefer forward lays use a(n):

four-way hydrant valve.


On dry-barrel hydrants, it is recommended that ___ be attached to the unused hydrant discharges.

gate valves


When using 2½- or 3-inch (65 mm or 77 mm) hoselines to supply the pumper directly off hydrant pressure, it is recommended that the lines be no longer than:

300 feet (90 m).


A reverse lay is used so that ___ can be made before laying a supply line.



If threaded couplings are used, hose beds set up for reverse lays should be loaded so that the first coupling to come off is:



The reverse lay has become a standard method for setting up a ___ operation when using smaller diameter hose as a supply line.

relay pumping


A disadvantage of the reverse lay is that:

essential fire fighting equipment must be removed and placed at the fire location before the pumper can proceed to the water source.


Do not engage the pump drive system ___ if there will be an extended period of time where water is introduced into the pump.

before leaving the cab


If operating a two-stage pump, set the ___ valve to the proper position before increasing the throttle to build discharge pressure.



Open discharge valves:



In most cases, the static water supply will be located:

at a lower level than the fire pump.


In order to pump from a lower level, ___ must be created by evacuating some of the air inside the fire pump.

a partial vacuum


To force water into the pump, ___ is needed between the fire pump and the body of water to be used.

hard intake hose


The amount of friction loss in the intake hose depends upon the:

diameter and length of the hose.