Pump Ops Course Flashcards

1
Q

Legislation

There are numerous pieces of legislation that have an impact on fire and rescue services as they pursue their find fundamental duties. Just some of these include:

A

Fire and rescue service act 2004

Civil contingencies act 2004

Water act 2003

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2
Q

Practical pump operating

Lincolnshire’s water supplies, particularly hydrants can be limited and have poor pressure. Therefore, it is important to preserve water..

This can be achieved by:

A

Using hosereels rather than delivery hose.

LPM setting on branch to lowest setting.

Considering tactical priorities

Using MDT and local knowledge

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3
Q

Main 2 types of LFR pumps

A

Centrifugal Pump - low pressure

Peripheral Pump - high pressure

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4
Q

Positive Displacement Pumps

Which 2 do we have on the fire engine

A

Stirrup pump

Knapsack pump (water backpack)

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5
Q

Primers

Centrifugal Pumps cannot pump gases, therefore the air in the suction side must be removed and replaced with liquid before they can operate………..this is known as printing.

Types of primers in LFR:

A

Reciprocating primer - major pumps

Exhaust Gas Ejector Primer - LPO

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6
Q

Jet reaction

What is it

A

When water is protected from a nozzle, and a reaction equal and opposite to the force required to discharge the jet takes place at the nozzle which recoils in the opposite direction to the flow.

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7
Q

Water hammer what is it?

A

The sudden turning off of flowing water can lead to damage to fire service equipment or the town main when hydrant valve or tank valve is suddenly closed.

Tank valves to be closed slowly when connected to a hydrant.

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8
Q

Branch operator on a ladder

A

Never give water to a branch person on a ladder until it is asked for.

Jet reaction can push the operator off a ladder.

The coupling at the bottom of the ladder is not connected until “water in” is given by the branch operator.

No more than 3 bars to start with

Increase water supply gently

Always prioritise the branch operator on the ladder if more than one delivery is in use.

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9
Q

Factors affecting a lift

CREST

A

Create the flow
Resistance - overcome frictional resistance
Entry loss
Strainers
Temperature

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10
Q

Crest

A

Create the flow - i.e to give water kinetic energy as it changes from its static state in the open supply to its moving state in the suction hose. .

Resistance - overcome frictional resistance to the flow in the suction hose and couplings.

Entry loss - overcome pressure loss due to turbulence and shock as the water enters the pump impeller. It is known as Entry loss and varies with the design of the pump.

Strainers - overcome pressure loss as the water is forced through the strainer and changes it’s direction of flow after entering.

Temperature - overcome any tendency for the water to vaporise (and so create an opposing vapour pressure) as it nears the impleller. This tendency increases rapidly with temperature. In fact the vapour pressure of water becomes equal to atmospheric pressure at its boiling point so making it totally impossible to lift water at, or near, this temperature.
At normal outdoor water temperature the effect is Small, however.

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11
Q

Theoretical lift

Practical lift

A

Main pumps - practical lift is 8 Metres .

LPP - practical lift is 6 Metres.

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12
Q

Methods of water delivery

A

Water shuttle

Water relays

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13
Q

Water carrying or water shuttle is achieved by using a number of water tenders to collect water from the source and deliver it to the tank of a fire vehicle or into a temporary open dam.

A

Above

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14
Q

Advantages of water carrying

A

Fewer numbers of fire vehicles are required at the incident.

Few personnel are required

Total time taken to mobilise fire vehicles is usually reduced.

Fewer numbers of water carrying journeys are required.

Fire vehicles are not committed simply to carry water

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15
Q

2 types of water relays

A

Closed circuit water relay

Open circuit water relay

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16
Q

What is the difference between the close down procedure at the end of operations for the LPP and the close down procedure in the event of an emergency?

A

To close down at the end of operations; reduce the revs to idle, and allow idling for 1 minute, close all deliveries and turn off the pump.

To close in an emergency turn off LPP and close deliveries.

17
Q

LPP theoretical lift and practical lift

A

Theoretical 10m
Practical 6m

18
Q

Considerations when using the LPP?

A

Minimum of 20 minutes

Do not run the pump dry

Allow LPP to idle for 1 minute before stopping the engine.

Always drain the pump after use

Check oil and fuel levels after use.

Flush the pump if used to pump contaminated water.

Check for debris in the pump eye when pump is not running.

19
Q

Major pump Scania Augmented supply

What pressure should the major pump be set for compartment entry?

A

20 bar

20
Q

Major pump Scania Augmented supply

If in high pressure and the high pressure hose reels do not work, what is the first thing to check?

A

Check the hose reel isolator valves in the hose locker has not isolated.

21
Q

Major pump Scania Augmented supply

How many tank fillers and how many deliveries are there?

A

1 tank filler
2 inlets on the collecting head
3 deliveries

22
Q

Water relay Scania
2 types of water relay

A

Open
Closed

23
Q

Water relay Scania
Optimum pressure setting for a water relay

A

7 bar