Pumping Flashcards
How many litres does the truck carry?
1800 litres
Make and model of the pump?
Godiva 20/10 World Series
How long will your full pump last using one hose reel jet on max?
16.5 minutes
Types of primer used in DFRS?
Reciprocating
Exhaust gas ejection
Why might your LPP not be priming?
Not in line to prime Choke Fuel line engaged Faulty suction hose Basket not submerged adequately Too greater lift
Which locker is the LPP stored in?
Offside front locker
Thermal relief valve?
42 degrees
Max low pressure?
17 bar
Max high pressure?
55 bar
Where is the high volume pump located?
Ilkeston
Frictional loss for:
70mm hose
45mm hose
Head of height
0.2 bar
1 bar
0.1 bar per metre
3 ways to prime a pump?
Use of a primer
Elevated supply
Pressure fed supply
Describe cavitation
As an impellers vanes move through a fluid areas of low pressure are formed, the faster the speed the lower the pressure created. As the fluid reaches vapour pressure it vapourises and forms small bubbles. As these pass from areas of low pressure to high pressure they can implode causing local shock waves which may be audible and even damage the pump.
Max output of the pump?
2000 lpm at 10 bar with a max lift of 3m
Where is the area of low pressure formed?
The eye of the pump
What allows the water to move up the suction hose to the pump?
Atmospheric pressure
Max theoretical and practical lift
10m
8m
Average pressure from a standard hydrant?
3-5 bar
Two types of water relay?
Closed circuit
Open circuit
Pressure for the Porter method and volume of water per minute at each stage
7 bar
800
1800
2250
Your OIC has requested you give the team 6 bar pressure through delivery 1
How much pressure do you give them initially?
3 bar max
Duty point of the LPP
4.5 bar - 1000 lpm
How much fuel does the LPP hold and how long roughly does that give you of pumping time?
8.5 litres
90 mins
How light you identify a compound gauge
It will have a negative AND positive side
Which section of suction gets attached to the pump?
The clear one
What may closing a hydrant too quickly cause?
Water hammer
If we are not getting enough water from a hydrant what can we do?
Ring Severn Trent and ask them to up the pressure
Find an alternative
What bar do you set your HRJ at?
25 bar on the high pressure gauge
Can you run the delivery lines in the high pressure mode?
Yes
What pressure do we feed the ALP
10 bar
When using the Porter method what happens if the middle pump suddenly has a pump failure?
Nothing, the water will slip straight through - however there may be a slight loss of pressure which the first epump will automatically account for
