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LFB DAY > Practice Questions > Flashcards

Practice Questions Flashcards

1
Q

What is the British standard for a hydrant

A

1.7 bar pressure
2000 lpm
65mm round thread anti clockwise opening

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2
Q

Why should you hand be on top of the branch when operating

A

To make sure that any water that drains from the branch does not dampen gloves, which when exposed to heat could cause steam burns

To control jet reaction

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3
Q

What is the operating pressure of the RB101

A

Optimum 6 bar, but works between 3 and 6

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4
Q

What is the optimum pressure for the hosereel

A

35-40 bar

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5
Q

What are the flow settings for the RB101

A

130
230
300
400 litres per minute

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6
Q

What is a 90mm hosereel adaptor used for?

A

To attach a storz coupling to an instantaneous coupling

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7
Q

What is the length and weight of a 70 mm hose?

A

23 metres

15kg

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8
Q

What is the length and weight of a 45mm hose?

A

23metres

9kg

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9
Q

What are the lengths of the 150mm hose?

A

5m
10m
50m

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10
Q

When is hose tested?

A

On acceptance
After use
Annually

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11
Q

What are the three purposes of appliance inventory

A

To make sure that all equipment is accounted for
That all equipment is in working order
That all equipment is stowed correctly

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12
Q

What should the pump operator do when overrunning the supply

A 
Check for a more efficient water source
Lower flow settings
Potentially shut down branches
Reduce engine revs
Consider withdrawing crew
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13
Q

When the bypass lever has been activated, how much water is the pump capable of pumping

A

1000 litres per minute

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14
Q

When pumping, what could a sudden increase in pressure indicate?

A

Closed branch
Kink in branch
Vehicle or debris on delivery hose

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15
Q

Define risk

A

The measure of LIKLIHOOD that the harm from a particular hazard will occur, and the possible SEVERITY of the harm

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16
Q

What is the weight and length of the 9 m ladder?

A

40.6 kg

9m

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17
Q

What is the length and weight of the 135

A

13.5 m

100 kg

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18
Q

What is the length and weight of a short extension ladder?

A

6m

21kg

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19
Q

What are the three ladder pitch checks

A

3-5 rounds above the sill

50mm clear above or below the sill

150mm (or less) from the sill

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20
Q

What are the three safety considerations when working on a ladder

A

3 points of contact
1 person per extension at a time (unless carrying out a rescue)
Don’t over reach

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21
Q

What is a primer?

A

A device that is capable of pumping air

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22
Q

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

A

10m

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23
Q

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

A

8m

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24
Q

What are the 4 methods of applying hi-ex foam

A

Raindown
Indirect
Rolling-on
Gentle

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25
Q

What are the two types of water relay

A

Open and closed

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26
Q

What is the respiratory protective equipment number?

A

Policy 466

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27
Q

How does the body dissipate heat?

A

Radiation

Convection

Evaporation

Vaporisation

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28
Q

What are the physical effects of heat stress

A 
Heat cramps
Exhaustion
Dehydration
Fatigue
Nausea
Confusion
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29
Q

What sizes of soft suction are available?

A

45mm
70mm
90mm
150mm

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30
Q

What is the single most important factor affecting pressure loss?

A

Diameter of hose

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31
Q

When lifting from open water, what would a compound gauge of -0.2 indicate?

A

A lift of 2 metres

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32
Q

What is the length of the hard suction hose?

A

2.44 m

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33
Q

How many lengths of hosereel are carried on the appliance?

A

8

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34
Q

What are the two types of pump

A

Centrifugal (pumps fluid)

Positive displacement (pumps air)

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35
Q

What are the factors that affect pressure loss

A

Internal diameter of hose

Flow of water

Height above or below the water source

Length of hoseline

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36
Q

What are the visible symptoms of heat stroke?

A

Loss of consciousness
Lack of sweating
Convulsions

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37
Q

What does the compound gauge indicate?

A

It records both positive and negative pressures.

A vacuum reading (negative pressure) when lifting from open water

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38
Q

When should the compound gauge be monitored

A

Constantly during pumping operations

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39
Q

What is the weight of the roof ladder?

A

14 kg

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40
Q

What is the length of the roof ladder (when unfolded)

A

4.6 metres

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41
Q

How long is a guideline?

A

60 metres

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42
Q

How long is a personal line, when fully extended

A

6 metres.

43
Q

How long is a personal line (not fully extended)

A

1.25m

44
Q

How many guideline tallies are carried on a pump ladder?

A

2 (A and B)

45
Q

When is second stage ECB used?

A 
More than 1 entry control point
The incident is likely to be protracted
Emergency team committed
Use of guidelines
EDBA
Relief teams required at larger incidents
More than 1 ECB
When GTS workers are out of sight
Telemetry leaky feeder
Basement fires
46
Q

When might an emergency team be committed

A

When anther DSU or ADSU alarm is sounded.

When a team has not exited at their time of whistle.

When informed that a team member is in distress.

47
Q

When is an A test performed?

A

Cylinder change
When nominated to test a spare
When taking over a set
Following respirator use

48
Q

What are the requirements of a hose?

A

Should be reliable
Should be resistant (bursting, chemicals, kinking)
Should not stretch excessively
Should be light and easy to handle
Durable and easy to repair
Smooth surfaced internally to keep frictional loss to a minimum
Capable of withstanding pressure changes

49
Q

When charged, how much should a hose stretch, both in length and diameter?

A

5% in length

10% in diameter

50
Q

What two leak detection devices might be encountered in a hydrant?

A

Screw on or magnetic

51
Q

When is a hydrant tested?

A

Yearly visual check
Every 4 years tested manually

Between April and October

52
Q

What information is found on a hydrant plate?

A

The size of a hydrant
The distance to the hydrant
Whether it is a single or double hydrant

53
Q

What branches are carried on a frontline appliance?

A

RB101
Projet 2
Ultimatic hosereel branch

54
Q

What is the length and weight of the 45mm hose?

A

23metres

9kg

55
Q

What is the length and weight of the 70mm hose?

A

23 metres

15kg

56
Q

What is the length and weight of the 90mm hose?

A

30 metres

23.5kg

57
Q

What is the internal diameter of the hosereel hose?

A

19mm

58
Q

What is the diameter of the hard suction

A

100mm

59
Q

How many lengths of hard suction are carried on an appliance

A

2

60
Q

How many litres of water can be held in the appliance tank?

A

1400 litres

61
Q

What is the maximum output of the pump?

A

The pump can produce 4000 litres per minute, however due to the internal plumbing, this is limited to 2700 litres per minute

62
Q

Who maintains hydrants?

A

The local water authority

63
Q

What are the available flowrates when using the akron ground monitor with the variable nozzle?

A

950 litres per minute
1400 litres per minute
1900 litres per minute

64
Q

What are the available flowrates when using the akron ground monitor with the deluge nozzle?

A

1750 litres per minute

65
Q

What are the available flowrates when using the akron ground monitor with the foam nozzle?

A

950 litres per minute

66
Q

How should water supply the ground monitor?

A

Directly with a 70mm hose

67
Q

What is the optimum pressure of the ground monitor?

A

7 bar

68
Q

What is the effective working pressure of the projet 2 branch?

A

Between 3.5 and 7 bar pressure

69
Q

What is the flowrate of the ultimatic branch

A

115 litres per minute

70
Q

What is the throw of the projet 2 branch?

A

57 metres

71
Q

How long is the roof ladder?

A

4.6 metres

72
Q

What is the weight of the roof ladder?

A

14kg

73
Q

What is the length of the three piece short extension ladder?

A

6m

74
Q

What is the weight of the three piece short extension ladder?

A

21kg

75
Q

What does the impellar do?

A

It’s a rotating component that imparts kinetic energy to fluid

76
Q

What does the volute do?

A

It converts the kinetic energy (from the impellar) into pressure energy

77
Q

When water is being supplied from the appliance (with supply augmented from a hydrant), how much water can the pump deliver?

A

2700 litres per minute

78
Q

What is the tank duration when using one hosereel?

A

12.2 minutes

79
Q

What is the tank duration when using two hosereels?

A

7 minutes

80
Q

How many litres per minute do two hosereels use?

A

200 litres per minute

81
Q

What is the tank duration when using an RB101 branch at 230l/minute?

A

6 minutes

82
Q

What is a pump?

A

A machine, driven by external power, that gives energy to fluid

83
Q

When might you need to lift from open water?

A

When the hydrant supply is inefficient

When an area is flooded and its necessary to remove water

84
Q

What are the factors that prevent water being lifted to 10metres

A

OFPITA

Overcoming Intertia
Frictional Loss
Pump entry loss
Imperfect Vacuum
Temperature
Atmospheric pressure
85
Q

How does temperature affect open water lifting?

A

The higher the temperature, the more difficult it is to lift

86
Q

What is the primers minimum pump speed?

A

1200rpm

87
Q

When lifting from open water, what could a decrease in pressure indicate?

A

A blocked strainer
Internal collapse of hard suction
Water level lowering

88
Q

When lifting from open water, what could an increase in pressure indicate?

A

Loss of lift
A leak in hard suction
Water level increasing (tidal)

89
Q

Where would you find the high pressure gauge?

A

In the middle of the three gauges

90
Q

What would an increase on the high pressure gauge indicate?

A

Closed branch/branches

91
Q

What would a decrease in pressure on the high pressure gauge indicate?

A

Open branch/branches

92
Q

What is the third gauge on the pump (right hand side)?

A

The low pressure gauge

93
Q

On the low pressure gauge, what would a decrease in pressure indicate?

A

Open branches

Burst branch length

94
Q

On the low pressure gauge, what would an increase in pressure indicate?

A

Closed branch
Reduced flow setting at the branch
Blockage to delivery hose (likely debris or vehicle)

95
Q

On a water relay, what is the maximum distance from the water source to the first appliance

A

3 lengths of hose

96
Q

On a water relay, what is the maximum distance between pumps when using 70mm hose?

A

Flat ground - 8 lengths

10% gradient - 6 lengths

97
Q

On a water relay, what is the maximum distance between pumps when using 90mm hose?

A

Flat ground - 15 lengths

10% gradient - 12 lengths

98
Q

When pumping, if the bypass valve has been open, how much water is the appliance capable of pumping?

A

1000 litres per minute

99
Q

What delivery gives less water

A

Delivery 1 gives 100 litres per minute less than 2 and 3 due to the internal plumbing

100
Q

With a full tank of fuel in the appliance, how long can the pump operate?

A

4 hours

101
Q

If the pump is supplying an aeriel appliance, can it supply water to another branch?

A

No, it must only supply the aeriel appliance.

102
Q

On the compound gauge, what does the negative pressure measure?

A

It indicates the lift perametres between the surface of the water and the eye of the pump

103
Q

What are the features of the pump?

A

It can pump high volumes of water at low pressure.
It can pump low volumes of water it high pressure
It can pump both high and low pressures of water simultaneously

LFB DAY (2 decks)

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