Pumping

Question 1

How many litres does the truck carry?

Answer 1

1800 litres

Question 2

Make and model of the pump?

Answer 2

Godiva 20/10 World Series

Question 3

How long will your full pump last using one hose reel jet on max?

Answer 3

16.5 minutes

Question 4

Types of primer used in DFRS?

Answer 4

Reciprocating

Exhaust gas ejection

Question 5

Why might your LPP not be priming?

Answer 5

Not in line to prime
Choke
Fuel line engaged
Faulty suction hose
Basket not submerged adequately
Too greater lift

Question 6

Which locker is the LPP stored in?

Answer 6

Offside front locker

Question 7

Thermal relief valve?

Answer 7

42 degrees

Question 8

Max low pressure?

Answer 8

17 bar

Question 9

Max high pressure?

Answer 9

55 bar

Question 10

Where is the high volume pump located?

Answer 10

Ilkeston

Question 11

Frictional loss for:
70mm hose
45mm hose
Head of height

Answer 11

0.2 bar
1 bar
0.1 bar per metre

Question 12

3 ways to prime a pump?

Answer 12

Use of a primer
Elevated supply
Pressure fed supply

Question 13

Describe cavitation

Answer 13

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.

Question 14

Max output of the pump?

Answer 14

2000 lpm at 10 bar with a max lift of 3m

Question 15

Where is the area of low pressure formed?

Answer 15

The eye of the pump

Question 16

What allows the water to move up the suction hose to the pump?

Answer 16

Atmospheric pressure

Question 17

Max theoretical and practical lift

Answer 17

10m

8m

Question 18

Average pressure from a standard hydrant?

Answer 18

3-5 bar

Question 19

Two types of water relay?

Answer 19

Closed circuit

Open circuit

Question 20

Pressure for the Porter method and volume of water per minute at each stage

Answer 20

7 bar
800
1800
2250

Question 21

Your OIC has requested you give the team 6 bar pressure through delivery 1
How much pressure do you give them initially?

Answer 21

3 bar max

Question 22

Duty point of the LPP

Answer 22

4.5 bar - 1000 lpm

Question 23

How much fuel does the LPP hold and how long roughly does that give you of pumping time?

Answer 23

8.5 litres

90 mins

Question 24

How light you identify a compound gauge

Answer 24

It will have a negative AND positive side

Question 25

Which section of suction gets attached to the pump?

Answer 25

The clear one

Question 26

What may closing a hydrant too quickly cause?

Answer 26

Water hammer

Question 27

If we are not getting enough water from a hydrant what can we do?

Answer 27

Ring Severn Trent and ask them to up the pressure

Find an alternative

Question 28

What bar do you set your HRJ at?

Answer 28

25 bar on the high pressure gauge

Question 29

Can you run the delivery lines in the high pressure mode?

Answer 29

Yes

Question 30

What pressure do we feed the ALP

Answer 30

10 bar

Question 31

When using the Porter method what happens if the middle pump suddenly has a pump failure?

Answer 31

Nothing, the water will slip straight through - however there may be a slight loss of pressure which the first epump will automatically account for