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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
Q

Describe the 90mm hose?

Lengths, weight, how many, max working pressure

A

90mm - yellow, 30m long, 23.5kg, up to 4km of hose on hose laying units, 15 BAR pressure

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26
Q

Explain the numbers on hydrant plates?

A

Arms - diameter of mains pipe in inches or mm

Legs - distance to the hydrant in feet or m

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27
Q

Where would you find a pressure release instantaneous coupling?
Two answers

A

On a double headed standpipe, and pump outlets

28
Q

When do hydrant tests take place?

Two answers

A

Visually each year, standard tests every four years

April - September, or October

29
Q

What is a drain boss?

A

Allows water to drain from the hydrant pit when it has been turned off

30
Q

Why are false spindles used?

Two answers

A

Protects the hydrant spindle from damage

Easily replaceable

31
Q

What are the hydrants British Standards?

Three answers

A

65mm round thread outlet
2000 lpm at 1.7 BAR
Opens anti-clockwise

32
Q

What is the purpose of a hydrant?

A

To provide water in the case of an incident

33
Q

What is hydrant gear? What is the purpose of the standpipe?

A

Standpipe, key and bar

To access the hydrant from above ground level

34
Q

What is m given to opening, flushing and connecting the hydrant?

A

Shipping or setting the hydrant

35
Q

Who is responsible for making sure London has adequate water for fire fighting?

A

LFEPA

36
Q

Name two types of detection devices for hydrant leaks?

A

Magnetic and Screw-on

37
Q

What should be done with screw-on leak detection devices after an incident?

A

Should be removed and left at the bottom of the hydrant pit, then inform the water company

38
Q

Name examples of open water sources?

A

Rivers, canals, docks, swimming pools, Wells

39
Q

Why does the LFB lift from open water?

A

Supplying large amounts of water

In cases such as flooding

40
Q

Practically water can only be lifted from 8m not 10m. What factors cause this? OFPITA

A 
Overcoming inertia (getting it moving)
Frictional loss
Pump entry loss 
Imperfect vacuum
Temperature
Atmospheric pressure
41
Q

What is the name of the pump the LFB use?

A

Godiva World Series Universal Multi-Pressure Centrifugal Pump

42
Q

What are the two parts of the pump?

Two answers

A

Impeller - Rotating component creates kinetic energy

Volute - Casing, turns kinetic to pressure energy

43
Q

What are the flow rates and pressures of the hosereels?

A

30-40 BAR

115-150lpm

44
Q

The centrifugal Pump can do what three things? How it operates
Three answers

A

High volumes at low pressure
Low volumes at high pressure
Both simultaneously

45
Q

What is the capacity of the appliance tank?

Water and foam

A

1400 litres of water

127 litres of foam

46
Q

How much water can the pump deliver?

A

2700lpm

47
Q

An increase in the low pressure gauge could mean?

Three answers

A

Branches being shut down
Kinks in delivery hose
Vehicles or debris on the delivery hose

48
Q

A decrease on the low pressure gauge could mean?

Three answers

A

Branches being opened
Burst delivery hose
Appliance tank is empty

49
Q

If the bipass valve is to be used, what must be done, and what would be the water usage?

A

Inform the IC, as Pump is defective

1000lpm

50
Q

Give four factors affecting pressure loss?

Four answers

A

Diameter and length of hose
Output flow of water
Height above or below the water source

51
Q

What is the frictional loss of a hosereel working at 115lpm?

A

8.5 BAR

52
Q

What are the frictional losses for 45mm and 70mm hose?

A

45mm - 1 BAR

70mm - 0.2 BAR

53
Q

For every meter above the water source, how much pressure is lost?

A

0.1 BAR

Every 3 floors is about 1 BAR

54
Q

How much BAR is atmospheric pressure at sea level?

A

1 BAR

55
Q

What equipment is used when lifting from open water?

Seven answers

A 
Hard suction hose
Suction strainer
Strainer basket
Suction wrenches
140-100mm adapter
Short line
Salvage sheet
56
Q

What knots are used when attaching a short line to a hard suction hose, to keep it bent and in an S-shape?

A

Clover hitch by the strainer
Half hitches to bend it
Round turn two hitches by Pump

57
Q

How deep must the strainer be below the surface to stop a vortex happening?

A

300mm or more

58
Q

For every meter of lift, what will the compound gauge reading show?

A

-0.1 - If lifting from 3 meters, the gauge would show -0.3

59
Q

If the compound gauge reading increases, what could this suggest?
Four answers

A

A tidal water source dropping
Suction strainer blocked
Branches open
Burst delivery hose

60
Q

A decrease in the compound gauge could suggest what?

Three answers

A

Rising tidal source
Branches shut down
Slight air leak in the suction hose

61
Q

What is the Angus Turbex Mark II?

A

A giant fan that blows foam in a certain direction

62
Q

What types of foam do the LFB use?

Two answers

A

Low and high expansion foam

63
Q

Where is medium expansion foam commonly used?

A

At airports

64
Q

What are the differences between low and high expansion foam?

A

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
Q

When would high expansion foam be used?

A

For filling enclosed rooms where there is a fire, such as a basement

LFB Notes (FFD) (10 decks)

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