Engine Op's Ch. 9 Add 1 High Pressure Pumping Flashcards Preview

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Flashcards in Engine Op's Ch. 9 Add 1 High Pressure Pumping Deck (18):
1

Engine companies are classified by their pumping capabilities, equipment and training as follows:
 Conventional Engines: Two-stage ____ gpm or ____ gpm engines.
Fill in the blanks

1.1
1000
2000

2

Engine companies are classified by their pumping capabilities, equipment and training as follows:
 High-Pressure Engines: Two-stage 1000 gpm or 2000 gpm engines retro-fitted with a special high-pressure discharge elbow, and have been issued specialized highpressure equipment to pump at discharge pressures over ___ psi and up to ___ psi.
Fill in the blanks

1.1
250
600

3

Engine companies are classified by their pumping capabilities, equipment and training as follows:
 3rd Stage Engines: An engine with a 3rd Stage. This 3rd Stage can supply a maximum of ___ gpm up to ___ psi.
Fill in the blanks

1.1
500
700

4


High-pressure and 3rd-stage engines have the following specialized equipment;
 3” high-pressure supply hose, 50’ per length.
 High-pressure fittings.
 High-pressure outlets.
How many HP outlets on HP engines and 3rd Stage Engines?
.

1.2
o One HP outlet on HP Engines.
o Two HP outlets on 3rd Stage Engines

5


High-pressure pumping is defined as operating at discharge pressures over how many psi?

1.3
High-pressure pumping is defined as operating at discharge pressures over 250 psi. The Incident Commander (IC) shall be notified when high-pressure pumping is
necessary.

6


All engines, including conventional engines, are capable or providing pressures over 250 psi. However, unless emergency conditions exist and they are ordered to do so by the IC, conventional engines should not operate in pressures exceeding how many psi?

1.4
250 psi.

7


To simplify computing pump discharge pressure when supplying a standpipe system, a street hydraulics chart has been formulated. These calculations are based on nozzle pressure, friction loss of three lengths of 2½” hose, head loss, system friction loss and friction loss of two lengths of hose supplying the fire department connection.
Starting at floors 1-10 the recommended pump discharge pressure should be ___ psi and increase by __ psi for every 10 floors above.
fill in the blanks

2.1
150
50

8


When high-pressure pumping operations are in use (excess of 250 psi), the following precautions are to be followed:
 Specially trained and equipped ‘High-Pressure’ or ‘3rd Stage’ engines must use their high-pressure supply hose, fittings (painted _____ and noticeably _______ than conventional fittings) and tether strap. Conventional engines do not have this equipment.
Fill in the blanks

3.1
white
heavier

9


When high-pressure pumping operations are in use (excess of 250 psi), the following precautions are to be followed:
 Whenever possible, an engine supplying high-pressure should be positioned within __ hose length(s) of the fire department connection being supplied. No more than __ connected lengths of high-pressure supply hose should be stretched to the fire department connection.
Fill in the blanks

3.1
1
2

10


When high-pressure pumping operations are in use (excess of 250 psi), the following precautions are to be followed:
 Prior to initiating high-pressure pumping, a safety zone must be established on each side of the engine and high-pressure supply hose. Warning tape, rope or stanchions are to be used to designate this zone. When high-pressure pumping operations are conducted, Maintain safety zones of at least __ feet around a working engine in all directions including the high-pressure supply hose. If two connected lengths of high pressure supply hose are in use, the safety zone may need to be expanded.
Fill in the blank

3.1
50

11


When high-pressure pumping operations are in use (excess of 250 psi), the following precautions are to be followed:
 Each engine operating at high-pressure must be controlled by the ECC and assisted by an ECC from a non-pumping engine. One ECC shall operate the pump and one ECC shall monitor radio communications. Other ECCs of non-pumping engines shall assist in what?

3.1
Keeping persons out of the safety zone.

12


When high-pressure pumping operations are in use (excess of 250 psi), the following precautions are to be followed:
 Supply lines must be secured using the tether strap. The tether strap shall be secured to both the engine and the building fire department connection. When more than one length of hose is required, each length must be tethered and secured to each other by the tether gated hook. When ordered to pump in highpressure, engines without tethering straps should secure the supply line to the building siamese connection and the apparatus using what?

3.1
A utility rope.

13


Stairwells served by standpipes must not be used as what during high pressure pumping operations?

3.1
Staging or rest areas. Use a minimum amount of operating personnel in these stairways.

14


Preset pressures on apparatus equipped with pressure governors, should not be used when charging a standpipe system.
True or false

3.1
True
Preset pressures on apparatus equipped with pressure governors, should not be used when charging a standpipe system. Once the supply line is charged, pressures are to be increased slowly to avoid damage to the building piping.

15


Officers must be aware of the potential need for high pressure pumping operations and the pumping capabilities of responding engines. Officers of ALL high pressure Engines and 3rd Stage Engines shall direct their ECCs to position the apparatus at a hydrant in proximity to the standpipe siamese connection. Communicate with on-scene units to coordinate proper positioning.
True or false

3.2
False
When other than first due to a fire in a high-rise building.

16


The standpipe system should be supplied by two engines. This will require more than one high-pressure or 3rd Stage Engine to be assigned or special called to the incident if pressures higher than 250 psi are required. When only one building siamese connection is available, stretch the second supply line to what location?

3.3
The first floor outlet. Do not connect two high-pressure supply lines to a single building siamese connection.

17

4.1
Pressures exceeding 600 psi will require a 3rd stage engine. When 3rd stage pumping is implemented, the IC shall ensure an additional 3rd Stage Engine is assigned to the incident. ECCs intending to pump using the 3rd stage must notify and get approval from the IC.
Who can order the use of the 3rd stage?

4.1
Only an IC at the rank of Battalion Chief or higher may order the use of the 3rd stage.

18


Can a high pressure pumper be used to pump pressures over 500 psi?

4.2
Yes but the 3rd stage is the preferred choice
As compared to two-stage engines, three-stage engines (with the third stage engaged) can pump higher volumes at pressures over 500 psi and will do so at lower pump rpm’s. This increased efficiency makes the 3rd Stage Engines the PREFERRED choice for pumping operations requiring discharge pressures over 500 psi.