Pumps And Pumping Flashcards
Hose reel pressure will be delivered at 3-4 times more than main delivery when both being used at same time
Mustn’t be more due to safety
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Should an appliance inventory be carried out before leaving an incident?
Yes
When are seatbelts checked?
Start of every watch.
Defects reported to crew or watch manager AND driver
Pump closest to water source in water relay is called?
Base pump
3 types of pumping appliance?
Pump
Pump ladder
Duel purpose pump ladder
All look identical other than their stowage
Near side and offside?
Near side to kerb
Offside on drivers side
Stop signal?
Right hand up, palm towards driver
Danger signal?
Both arms up, palms towards driver
Move away signal?
Opposite of move towards
Single crewed vehicles must never be manoeuvred on LFB premises with out an attendant.
Try not to drive into position where you need to reverse out from
Physically check behind vehicle if unsure
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2 parts of centralfugal pump?
Impeller
Volute
2 types of water relaying?
Closed circuit
(Water pumped through hose direct from one pump to the next)
Open circuit
(Water pumped through hose to portable dams/reservoirs/appliance tank before entering next pump)
2 types of pump found on front line appliances?
Centralfugal pump
Positive displacement pump.
Machines driven by external power to give energy to fluid
Peripheral impeller?
Allows for greater amount of pressure to be produced.
Godiva World Series has this
What prevents over hearing of a pump?
Thermal relief valve
How many lights on tank level indicator?
4 red light.
Each represents 25% of tank level
All 4 will flash when tank empty
How does internal diameter of hose effect pressure loss?
The smaller the internal diameter the more frictional loss
Can centralfugal pumps pump gas and air?
No
Which number deliveries are hydracilcly more most efficient on the pump?
2 and 3 due to layout
Can deliver 100lpm more
Useful for supplying arial appliance, water relaying and other times which need more water
High pressure gauge?
Shows pressure being delivered to hose reels
Pump ladder description?
Minimum crew of 4
Main rescue appliance at 2 appliance stations
Carried 135 ladder (13.5 meter long)
Carries rescue equipment for people trapped in vehicles
Do firefighters have to wear seatbelts when moving?
Yes
What hose usually fills tank from hydrant?
2 70mm.
Inlet on right hand side of pump bay
Low pressure gauge reading?
Used to make sure correct pressure is being deliver to branch operators
What colour does the battery level light flash in cab of battery level is low?
Green
Must be pressed before attempting to start vehicle
What does high pressure gauge measure?
Pressure being delivered to hosereels hoses
How to regulate amount of water being used to prevent overrunning?
Reduce number of jets
Reduce branch flow settings
Reduce appliance engine revs
Should water supplies be twinned from the same source? (Hydrant/appliance)?
YES
When are locker shutters inspected?
Inspected by the driver at change of watch.
PTO (power take off) procedures?
On series one
Carry out engine start procedures
Operate rocker type button on dashboard
Operate air dump switch in pump bay (must be reset before moving appliance again)
Press and hold function (master) button and at same time press PTO switch in pump bay until light comes on.
Move to attendants left?
Left arm out, palm towards driver
3 purposes of carrying out appliance inventory?
Equipment checks
Condition checks
Inventory checks
Hose reel pressure switch?
Must be switched to high pressure to deliver high pressure to hose reels
Check that blue arrows are in line on locker shutters and pillars on appliance.
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What does the flow meter mesure?
Flow rate of water going into the water tank.
Where to stand when reversing a appliance?
Between 5 and 10 meters behind, and 1 meter to the side.
So driver can see you in wing mirror
Dismount appliance side away from moving traffic
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Where is water tank located on appliance?
In centre
Behind the pump
Bypass valve?
Pulled when auto fill valve fails in closed position meaning water tank is not being filled.
Delivers upto 1000lpm
Can be very dangerous for crews firefighting.jy
Hose reels switches must be switched to low when not in use
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Inlet flow meter?
Measures water going into tank at lpm
Cab lockers be centrally locked from cab?
Yes
PTO procedure for series 2?
Carry out engine start up procedures
Press spring loaded incident switch in cab until light comes on
Continue as series one
Tank/water to pump switch?
When pressed allows water from tank to enter pump
What does the distance between pumps in a water relay depend on?
The flow required
Size of hose between pumps
Contours of the relay route
Watch manager must be kept informed of anything that cannot be replaced like equipment, or any appliance defects
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Overrunning the supply?
Pump is using more water than is being supplied meaning Running out of water in tank.
Pump between base pump and foreground pump are called?
Intermediate pumps
What must vehicle attendants wear?
High viz
Where should LLPs be based if appliance and LLPs are being used in water relay?
LLPs must be sited closest to the water source
Universal multi pressure pump?
2 stage pump,
Special type of impeller to allow higher pressure to be produced
Whos safety are firefighters responsible for?
Their own
Other firefighters
The public
If leaving a delivery open for cooling, a 70mm hose should be attached to direct water away.
Disengagement of PTO can also reduce overheating
.
Main pump used by LFB appliances?
Godiva World Series multi pressure pump.
2 stage pump
Can be used to:
High volumes of water at low pressure
Low volumes of water at high pressure
Both simultaneously
Auto fill vale?
Stops water tank becoming overfilled when filling up
At what speed should a vehicle be manouvered when using a attendant?
Slow walking pace
If the relay is producing insufficient flow, within the capabilities of the pumps, how can output be improved?
Shortening the distance between pumps by using more intermediate pumps.
Increasing the size (diameter) of hose
Operating considerations of a water relay being effective ? (4)
All pumps and other equipment being in good working order
Layout of relay being organised in a way that it’s used to its full capacity
Skill of the operators
Good communication and incident management
Duel purpose pump ladder description?
Minimum crew of 5
Carry 9 and 13.5 ladders
Carries rescue equipment
Cover all calls on station ground
Found on stations with only one appliance
Beam ladder gantries?
On top of appliances to help removal of ladders and other equipment on roof
What is augmenting the supply?
Working the amount of time a water supply will last when an appliance is pumping.
Number of jets in use, flow rate of jets, and flow rate of inlet will effect this.
What could a low pressure reading in a low pressure gauge indicate?
Branches being opened
Burst delivery hose
Water tank is empty
Pump appliance description?
Minimum crew of 4
Attends almost all incidents
Some carry addition light portable pumps
Main ladder is 9 metres long
Pumping engine speed joystick?
Increases or decreases the speed of the pump
Hose reel LH
Hose reel RH
Switches?
Pressed to open to allow delivery to either left or right hose reels or both at same time
What could a high pressure reading in a low pressure gauge indicate?
Branches being closed
Kinks
Vehicle on hose
Move towards attendant signal?
Both arms are ber, palms facing upwards, moments towards attendants body
Godiva World Series fire pump can produce how many litres per minute?
Capable of 4000 lpm
Only delivers 2700lpm
The higher the required output, the higher amount of frictional loss there will be.
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Pump gauges?
Water tank level
Rev counter
Compound gauge
High pressure gauge
Low pressure gauge
The water tank should be refilled from nearest hydrant before leaving an incident
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What’s the power take off (PTO) on a series 1?
Transfers power from wheels to to appliance pump.
What is the aim of a water relay?
To deliver the maximum delivery of water, using the least amount of equipment
Pump function button?
Master switch.
Must be held when operating other pump control switches
There should be no loose equipment in crew cab of appliance
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Appliance care and maintenance?
Checked by driver at every start of shift
Fuel, lubricants, Coolents etc must be replenished
General condition recorded in daily check
Must be kept clean for professional image and to stop detoeriation
Any defects brought to attention of driver or appliance commander ASAP
What is the capacity of water and foam on the Godiva World Series pump?
1400 litres for water
127 for foam
Move to attendants right?
Right arm out, palm towards driver
What type of centralfugal pump is on a appliance?
Allows a pherihal impeller cresting a greater pressure
Universal multi pressure pump.
The 2 main reasons for reduction in pressure?
Frictional loss in hose
Effects of gravity when working above the supply of water
What does low pressure gauge mesure?
Pressure being supplied to main delivery hoses
Can a positive displacement pump pump gas or air?
Yes
Who is responsible for safety when manoeuvring a vechicle?
The driver at all times
Must ensure all equipment has been stowed and lockers are closed also.
Vehicle attendants are responsible for ensuring they give correct and timely signals to driver
.
What does the compound gauge mesure?
Pressure in bar from inlet.
Positive of from hydrant
Negative if sucking from open water
PTO switch?
Engages PTO
Moveds engine from wheels to pump
Should the hydrant be connected before engaging the PTO valve?
No
What should be done if a length of soft suction hose supplying the tank from hydrant bursts?
Inlet valve on collection head should be closed until hydrant can be shut down and hose replaced
