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FFT > PP 004 + LAD (Pumps And Ladders) > Flashcards

PP 004 + LAD (Pumps And Ladders) Flashcards

1
Q

What is a pump?

A

A machine, driven by external power to give energy to a fluid.

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2
Q

Name 2 types of pumps

A

1) Centrifugal
2) positive displacement

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3
Q

What is centrifugal force?

A

Outward force associated with rotation

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4
Q

What are the 2 main parts of a centrifugal pump?

A
  • Impeller
  • volute
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5
Q

What does PTO stand for?

A

Power take off

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6
Q

Name the 2 types of impeller and their associated pressure

A

1) low pressure - large volume at low pressure for lay flat hoses
2) peripheral - high pressure, typically for hose reel

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7
Q

Twinning the hydrant leads to how much more water than singular?

A

4 times more

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8
Q

Name the typically used pump gauges

A
  • hydrant to tank auto fill valve
  • tank to pump valve
  • low pressure delivery valves
  • high/low pressure lever
  • hose reel isolation valves
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9
Q

What does ePC stand for

A

ePump Control

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10
Q

A sudden increase in low pressure gauge reading indicates

A
  • branches being shut down
  • kinks in the delivery hose
  • vehicles/ debris on the delivery hose
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11
Q

A sudden decrease in low pressure gauge reading indicates

A
  • Branches being opened
  • burst delivery hose
  • appliance tank empty
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12
Q

Pulse spraying technique causes fluctuations in pressure

A

True

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13
Q

Reasons why we go to low pressure

A
  • less noise
  • less emissions
  • less fuel
  • reduce number of times auto cools
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14
Q

What is over running?

A

Using more water than your getting

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15
Q

How do you deal with over running?

A

1) increase supply ( find more efficient hydrant or open water source)
2) regulate water being delivered ( reduce the number of jets, flow settings, or appliance engine revs )

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16
Q

2 reasons for reduction in pressure

A

Frictional loss in hose line
Effects of gravity working above water source or pump

17
Q

Frictional loss is affected by

A

Internal diameter of hose
Output flow of water(higher flow = higher loss)
Height above or below water source
Length of hose

18
Q

Pressure loss of
45mm
70mm

A

1bar
0.2 bar

19
Q

Pressure Loss of
1m
1floor

A

0.1 bar
0.3 bar

20
Q

Command list for standard pitch of 9m ladder

A

Stand by to slip 9m ladder
Release
Slip
Well
Ready, brace, lift
Site heel number 3
Under run
Well
Prepare to extend
Extend
Well
Paws engaged
Head in
Head/heel adjustments
Take over number 3
Head/heal adjustments
Final check
Ladder pitched get to work

21
Q

Command list to MAKE UP 9m ladder

A

9m ladder crew
Head out
Well
Extend to lower
Lower
Clear behind (no. 3)
Under run
Stand by to launch
Ready brace lift
Launch
House
Check list
Ladder secure

22
Q

Commands for haul aloft

A

Up top
Below
Haul aloft
Right

23
Q

Commands for dropping

A

Below
Up top
Stand from under
Clear there

24
Q

Commands for aloft from building

A

Below
Up top
Haul away from building
Right

25
Q

9m Ladder Facts:

A

• 5.3meter when not extended
• 53mm across
• 40.6kg

26
Q

How much space do you need to take the 9m ladder off the appliance?

A

10m behind appliance
4.2m in height

27
Q

What are the measurements of the 9m ladder

A

5.3m pre-extended length
53cm width
40.6kg weight

28
Q

Why would you separate a 9m ladder

A

To bridge ( broken doors or stairs)

29
Q

Safety consideration when pitching a 9m ladder

A

Ground conditions
Safe lifting technique
Effective communication
PPE
Safe handling

30
Q

Ladder pitched checks

A
  • The string closest to the frame of the opening must be no more than 150mm from the frame
  • The round closest to the sill must be just above and parallel to the sill
  • There must be 3 to 5 rounds above the sill ( preferably 3 )
  • If pitching below the sill, the head must be at least 50mm below and not touching
31
Q

What is the emergency command when control is lost whilst pitching the 9m ladder

A

Head in

32
Q

Hose management problems

A

Identification of the hose line and subsequent maneuvering of the hose is difficult
Hose creates trip hazard
Stairs become inaccessible for access to fire fighters and escape for occupants

33
Q

Law 1

Law 2

Law 3

A

Law 1 - Pressure loss is directly proportional to the length of the hose through which the water flows
* The longer the hose lines, the greater the frictional loss

Law 2 - Pressure loss is directly proportional to the square of the flow rate
* If the flow rate through a line of hose is doubled, the pressure loss due to friction will increase by a factor of four

Law 3 - Pressure loss is inversely proportional to the hose diameter
* Diameter is the most important single factor which affects frictional loss. The frictional loss in 45mm hose is approximately 5 times greater than 70mm hose and 32 times greater than 90mm hose for the same flow rate

34
Q

Foot, hand, hand, foot

A

For mounting or dismounting a ladder

35
Q

45mm bar loss per length
70mm bar loss per length
Bar loss per meter in height

A

45mm loses 1 bar
70mm loses 0.2 bar
1 meter height = 0.1 bar lost (1 floor = 3 meter~)

36
Q

Short Extension Ladder
length
weight

A

6m
21kg

37
Q

135 ladder weight

A

100kg

FFT (20 decks)

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