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Flashcards in PP: Pumps & Pumping Deck (65)
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1

What is a branch.

Something used to direct water jets

2

Name the four LFB branches?

RB101
Rausenbauer Projet II
Ultimatic Hosereel Branch
Highrise Delta Attack Branch

3

What flow rates and pressure does the RB101 work at?

130, 230, 300, 400 lpm
6 BAR but can work at 3 BAR

4

When would a branch be defected?

5 teeth missing, or 3 in a row

5

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

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

6

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

19mm and 23mm
McDonalds couplings

7

Describe the Akron Ground Monitor?
Name, nozzles, flow rates

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

8

How do you clean a dirty hose?

With water and a broom
If it is contaminated, send off to workshop

9

Name some hose fittings?
Three answers

90mm adaptor kit
Collecting breaching
Dividing breaching

10

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

5m, 10m, 50m
Stored on the High Volume Pump (HVP)

11

List four ways to care for hose?
Four answers

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

12

What strap do all hoses have?

Bandit strap - identification

13

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

Male coupling
Overhand knot

14

List the four diameters of lay down hose?
Four answers

45mm, 70mm, 90mm, 150mm

15

Describe the hosereel?
Lengths, drums, water delivery

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

16

How often are hoses tested?
Three answers

On acceptance
After operational use
Annually

17

Describe the hard suction hose?
Length, diameter, quantity

2.44m long
100mm diameter
Two lengths on each appliance

18

What is the hard suction hose used for?

To withstand external atmospheric pressure
Used to lift water from an open water source

19

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

A washer

20

What hoses use Storz couplings?

90mm and 150mm

21

How are Storz couplings connected?

Using Storz spanners, making sure the red dots line up

22

What do hose couplings do?

Join two lengths of hose together

23

Which hoses have instantaneous couplings?

45mm and 70mm

24

Describe the 45mm and 70mm hose?
Lengths, weight, how many, max working pressure

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

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