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LFB Notes (FFD) > PP: Pumps & Pumping > Flashcards

PP: Pumps & Pumping Flashcards

1
Q

What is a branch.

A

Something used to direct water jets

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2
Q

Name the four LFB branches?

A

RB101
Rausenbauer Projet II
Ultimatic Hosereel Branch
Highrise Delta Attack Branch

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3
Q

What flow rates and pressure does the RB101 work at?

A

130, 230, 300, 400 lpm

6 BAR but can work at 3 BAR

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4
Q

When would a branch be defected?

A

5 teeth missing, or 3 in a row

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5
Q

What pressure and flow rates does the Projet 2 work on?

A

3.5 BAR - Jet 440 lpm Spray 640 lpm
7 BAR - Jet 630 lpm Spray 930 lpm
Throws up to 57m

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6
Q

What is the diameter of the hosereel and the name of the couplings on it?

A

19mm and 23mm

McDonalds couplings

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7
Q

Describe the Akron Ground Monitor?

Name, nozzles, flow rates

A

Variable flow rate - 950, 1400, 1900 lpm
Single flow deluge - 1750 lpm
Foam - 950 lpm

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8
Q

How do you clean a dirty hose?

A

With water and a broom

If it is contaminated, send off to workshop

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9
Q

Name some hose fittings?

Three answers

A

90mm adaptor kit
Collecting breaching
Dividing breaching

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10
Q

What are the three lengths of 150mm hose and where are they stored?

A

5m, 10m, 50m

Stored on the High Volume Pump (HVP)

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11
Q

List four ways to care for hose?

Four answers

A

Should be ramped when laid across the road
Under run and clean when stowed
Should not be kinked when pressurised
Not to be made up when frozen

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12
Q

What strap do all hoses have?

A

Bandit strap - identification

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13
Q

Defected hoses are rolled on what coupling, and what knot is used to show they are defected?

A

Male coupling

Overhand knot

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14
Q

List the four diameters of lay down hose?

Four answers

A

45mm, 70mm, 90mm, 150mm

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15
Q

Describe the hosereel?

Lengths, drums, water delivery

A

Two drums on each appliance
Four lengths of 18.3m on each drum
Designed to deliver low volumes of water at high pressure
19mm diameter

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16
Q

How often are hoses tested?

Three answers

A

On acceptance
After operational use
Annually

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17
Q

Describe the hard suction hose?

Length, diameter, quantity

A

2.44m long
100mm diameter
Two lengths on each appliance

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18
Q

What is the hard suction hose used for?

A

To withstand external atmospheric pressure

Used to lift water from an open water source

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19
Q

What is the object that creates a water seal in the female coupling?

A

A washer

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20
Q

What hoses use Storz couplings?

A

90mm and 150mm

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21
Q

How are Storz couplings connected?

A

Using Storz spanners, making sure the red dots line up

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22
Q

What do hose couplings do?

A

Join two lengths of hose together

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23
Q

Which hoses have instantaneous couplings?

A

45mm and 70mm

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24
Q

Describe the 45mm and 70mm hose?

Lengths, weight, how many, max working pressure

A

45mm - red, 23m long, 9kg, 4 lengths on each appliance, pump and pump ladder, 15 BAR pressure

70mm - red, 23m long, 15kg, 10 lengths on each appliance, pump and pump ladder, 15 BAR pressure

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25
Describe the 90mm hose? | Lengths, weight, how many, max working pressure
90mm - yellow, 30m long, 23.5kg, up to 4km of hose on hose laying units, 15 BAR pressure
26
Explain the numbers on hydrant plates?
Arms - diameter of mains pipe in inches or mm | Legs - distance to the hydrant in feet or m
27
Where would you find a pressure release instantaneous coupling? Two answers
On a double headed standpipe, and pump outlets
28
When do hydrant tests take place? | Two answers
Visually each year, standard tests every four years | April - September, or October
29
What is a drain boss?
Allows water to drain from the hydrant pit when it has been turned off
30
Why are false spindles used? | Two answers
Protects the hydrant spindle from damage | Easily replaceable
31
What are the hydrants British Standards? | Three answers
65mm round thread outlet 2000 lpm at 1.7 BAR Opens anti-clockwise
32
What is the purpose of a hydrant?
To provide water in the case of an incident
33
What is hydrant gear? What is the purpose of the standpipe?
Standpipe, key and bar | To access the hydrant from above ground level
34
What is m given to opening, flushing and connecting the hydrant?
Shipping or setting the hydrant
35
Who is responsible for making sure London has adequate water for fire fighting?
LFEPA
36
Name two types of detection devices for hydrant leaks?
Magnetic and Screw-on
37
What should be done with screw-on leak detection devices after an incident?
Should be removed and left at the bottom of the hydrant pit, then inform the water company
38
Name examples of open water sources?
Rivers, canals, docks, swimming pools, Wells
39
Why does the LFB lift from open water?
Supplying large amounts of water | In cases such as flooding
40
Practically water can only be lifted from 8m not 10m. What factors cause this? OFPITA
``` Overcoming inertia (getting it moving) Frictional loss Pump entry loss Imperfect vacuum Temperature Atmospheric pressure ```
41
What is the name of the pump the LFB use?
Godiva World Series Universal Multi-Pressure Centrifugal Pump
42
What are the two parts of the pump? | Two answers
Impeller - Rotating component creates kinetic energy | Volute - Casing, turns kinetic to pressure energy
43
What are the flow rates and pressures of the hosereels?
30-40 BAR | 115-150lpm
44
The centrifugal Pump can do what three things? How it operates Three answers
High volumes at low pressure Low volumes at high pressure Both simultaneously
45
What is the capacity of the appliance tank? | Water and foam
1400 litres of water | 127 litres of foam
46
How much water can the pump deliver?
2700lpm
47
An increase in the low pressure gauge could mean? | Three answers
Branches being shut down Kinks in delivery hose Vehicles or debris on the delivery hose
48
A decrease on the low pressure gauge could mean? | Three answers
Branches being opened Burst delivery hose Appliance tank is empty
49
If the bipass valve is to be used, what must be done, and what would be the water usage?
Inform the IC, as Pump is defective | 1000lpm
50
Give four factors affecting pressure loss? | Four answers
Diameter and length of hose Output flow of water Height above or below the water source
51
What is the frictional loss of a hosereel working at 115lpm?
8.5 BAR
52
What are the frictional losses for 45mm and 70mm hose?
45mm - 1 BAR | 70mm - 0.2 BAR
53
For every meter above the water source, how much pressure is lost?
0.1 BAR | Every 3 floors is about 1 BAR
54
How much BAR is atmospheric pressure at sea level?
1 BAR
55
What equipment is used when lifting from open water? | Seven answers
``` Hard suction hose Suction strainer Strainer basket Suction wrenches 140-100mm adapter Short line Salvage sheet ```
56
What knots are used when attaching a short line to a hard suction hose, to keep it bent and in an S-shape?
Clover hitch by the strainer Half hitches to bend it Round turn two hitches by Pump
57
How deep must the strainer be below the surface to stop a vortex happening?
300mm or more
58
For every meter of lift, what will the compound gauge reading show?
-0.1 - If lifting from 3 meters, the gauge would show -0.3
59
If the compound gauge reading increases, what could this suggest? Four answers
A tidal water source dropping Suction strainer blocked Branches open Burst delivery hose
60
A decrease in the compound gauge could suggest what? | Three answers
Rising tidal source Branches shut down Slight air leak in the suction hose
61
What is the Angus Turbex Mark II?
A giant fan that blows foam in a certain direction
62
What types of foam do the LFB use? | Two answers
Low and high expansion foam
63
Where is medium expansion foam commonly used?
At airports
64
What are the differences between low and high expansion foam?
Low expansion is sticky, but doesn’t expand much High expansion is not sticky, but expands lots Medium expansion is somewhere in the middle
65
When would high expansion foam be used?
For filling enclosed rooms where there is a fire, such as a basement

LFB Notes (FFD) (10 decks)

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