Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

JCB FFD Babcock training > Pumping > Flashcards

Pumping Flashcards

1
Q

What is a pump?

A

Machine, driven by external power, to give energy to fluid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What are the two types of pump used on front line appliances?

A

Centrifugal pump

Positive displacement pump

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What features does a centrifugal pump have?

A

Main LFB pump used on appliances, external power is road engine, cannot pump gas or air

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What features does a positive displacement pump have?

A

Work by moving a piston through a cylinder, bicycle pump is an example, can pump gas, examples are stirrup pump used on chimney fires and priming device found on light portable pump, hand operated

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What parts does a centrifugal pump have?

A

Impeller

Volute

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What does the impeller do?

A

Imparts kinetic energy to the fluid, rotating part of centrifugal pump, central inlet is called ‘eye of the pump’

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What does the Volute part of the centrifugal pump do?

A

Converts kinetic energy to pressure energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What is the PTO?

A

‘Power Take Off’ - in Fire appliance, impeller is fixed to drive shaft driven by road engine, power is diverted from road wheels to seperate drive shaft by engaging the PTO

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What is a UMP?

A

‘Universal Multi Pressure Pump’ - low pressure impeller and peripheral impeller is fixed to same drive shaft, housed within same casing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What is the major pump used in LFB Mercedes appliance and what is its features?

A

‘Godiva World Series multi pressure pump’ - it supplies high volume of water at low pressure, low volumes at high pressure, both low and high simultaneously

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What pressures and flow rates do the hose reels operate at/produce when being supplied from a peripheral impeller?

A

35-40 bar

115-150 lpm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

How much in litres does the appliance tank contain when full?

A

1400 Litres, each light contains a quarter of tank

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What are the pump gauges in the appliance?

A 
Water tank contents indicator 
Rev counter
Compound gauge 
High pressure gauge 
Low pressure gauge
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What is low pressure gauge reading?

A

Used to make sure pump is delivering correct pressure to the branch operators

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What could a sudden increase in a low pressure gauge indicate?

A

1) Branches being shut down
2) kinks in the delivery hose
3) Vehicles or debris on delivery hose

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What could sudden decrease in low pressure gauge reading indicate?

A

1) Branches being opened
2) burst delivery hose
3) appliance tank empty

17
Q

What is the Engine speed joystick?

A

Increases or decreases speed of pump giving more or less pressure to the water at delivery outlet of pump

18
Q

What is PTO switch?

A

Engages PTO?

19
Q

What is function (master) button?

A

Must be depressed at same time as pump control switches for them to operate

20
Q

What must happen in order for the appliance pump to work?

A

1) Engine must be running and incident/speed switch engaged in cab
2) once pumping operator must continually monitor and adjust controls to maintain desired pressure & flow of water to branch

21
Q

What do you do when operating the pump?

A

1) Air dump switch
2) press and hold function button and PTO switch
3) check lights on PTO switch illuminates

22
Q

What do you do when hose reels are no longer in use? And why?

A

Switch to low pressure ‘LP’, significantly reduces noise, fuel consumption and exhaust emission, prevents pump from overheating

23
Q

What is provided to avoid overheating?

A

Automatic thermal Relief valve, disengage PTO if pump is not required immediately

24
Q

What do you do if a delivery is left open for cooling?

A

A length of 70mm hose should be attached to direct water to a suitable drainage point

25
Q

What can the pump operator do if the supply is overrun?

A

PO can calculate the number of branches to be closed or flow setting to be reduced in order to restore balanced flow

26
Q

What is a flow metre?

A

Registers flow rate of water going into the tank in LPM, allows pump operator to assess quality of hydrant supply and monitor systems working correctly

27
Q

What is Auto fill valve?

A

Water flowing from inlet collecting head to appliance tank passes through AFV, it makes sure tank remains above 3/4 full without overflowing

28
Q

What do you do if length of soft suction hydrant bursts?

A

Inlet valve controlling its flow should be closed until hydrant can be shut down and hose replaced, prevents water flowing down burst length and spilling everywhere

29
Q

What should supplies alway be?

A

Twinned from the same source (appliance or hydrant)

30
Q

What is overrunning the supply?

A

Where pump is delivering more water than it is receiving through the augmented supply

31
Q

How do you prevent the occurrence of overrunning?

A

Pump operator should observe flow metre when auto valve is fully open, reading given will be total quantity available for use without overrunning supply.

32
Q

How is overrunning recognised?

A

Falling level of water tank contents indicator

33
Q

What steps to be taken after overrunning is recognised?

A

1) increase the supply

2) regulate amount of water delivered by reducing no. of jets, branch flow settings, appliance engine revs

34
Q

Pump operators should?

A

1) site the appliance appropriately
2) establish branch settings and supply flow
3) Monitor gauges, flow meter and water tank contents indicator to prevent overrunning, ensure correct pressure delivery to branches and make sure pump is performing correctly
4) overview of incident
5) observe hazard area
6) establish radio communication

35
Q

Why do you keep hand on top of branch?

A

Stop gloves from getting wet

Prevent kick back from force of water

36
Q

What are the checks done on the appliance?

A

Make sure equipment is stowed correctly
Make sure replenished
Make sure equipment is in operational use

37
Q

What is the theoretical maximum lift when lifting from open water?

A

10m

JCB FFD Babcock training (8 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions