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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
What are the two types of water relay
Open and closed
26
What is the respiratory protective equipment number?
Policy 466
27
How does the body dissipate heat?
Radiation Convection Evaporation Vaporisation
28
What are the physical effects of heat stress
``` Heat cramps Exhaustion Dehydration Fatigue Nausea Confusion ```
29
What sizes of soft suction are available?
45mm 70mm 90mm 150mm
30
What is the single most important factor affecting pressure loss?
Diameter of hose
31
When lifting from open water, what would a compound gauge of -0.2 indicate?
A lift of 2 metres
32
What is the length of the hard suction hose?
2.44 m
33
How many lengths of hosereel are carried on the appliance?
8
34
What are the two types of pump
Centrifugal (pumps fluid) Positive displacement (pumps air)
35
What are the factors that affect pressure loss
Internal diameter of hose Flow of water Height above or below the water source Length of hoseline
36
What are the visible symptoms of heat stroke?
Loss of consciousness Lack of sweating Convulsions
37
What does the compound gauge indicate?
It records both positive and negative pressures. | A vacuum reading (negative pressure) when lifting from open water
38
When should the compound gauge be monitored
Constantly during pumping operations
39
What is the weight of the roof ladder?
14 kg
40
What is the length of the roof ladder (when unfolded)
4.6 metres
41
How long is a guideline?
60 metres
42
How long is a personal line, when fully extended
6 metres.
43
How long is a personal line (not fully extended)
1.25m
44
How many guideline tallies are carried on a pump ladder?
2 (A and B)
45
When is second stage ECB used?
``` 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
When might an emergency team be committed
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
When is an A test performed?
Cylinder change When nominated to test a spare When taking over a set Following respirator use
48
What are the requirements of a hose?
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
When charged, how much should a hose stretch, both in length and diameter?
5% in length 10% in diameter
50
What two leak detection devices might be encountered in a hydrant?
Screw on or magnetic
51
When is a hydrant tested?
Yearly visual check Every 4 years tested manually Between April and October
52
What information is found on a hydrant plate?
The size of a hydrant The distance to the hydrant Whether it is a single or double hydrant
53
What branches are carried on a frontline appliance?
RB101 Projet 2 Ultimatic hosereel branch
54
What is the length and weight of the 45mm hose?
23metres | 9kg
55
What is the length and weight of the 70mm hose?
23 metres | 15kg
56
What is the length and weight of the 90mm hose?
30 metres | 23.5kg
57
What is the internal diameter of the hosereel hose?
19mm
58
What is the diameter of the hard suction
100mm
59
How many lengths of hard suction are carried on an appliance
2
60
How many litres of water can be held in the appliance tank?
1400 litres
61
What is the maximum output of the pump?
The pump can produce 4000 litres per minute, however due to the internal plumbing, this is limited to 2700 litres per minute
62
Who maintains hydrants?
The local water authority
63
What are the available flowrates when using the akron ground monitor with the variable nozzle?
950 litres per minute 1400 litres per minute 1900 litres per minute
64
What are the available flowrates when using the akron ground monitor with the deluge nozzle?
1750 litres per minute
65
What are the available flowrates when using the akron ground monitor with the foam nozzle?
950 litres per minute
66
How should water supply the ground monitor?
Directly with a 70mm hose
67
What is the optimum pressure of the ground monitor?
7 bar
68
What is the effective working pressure of the projet 2 branch?
Between 3.5 and 7 bar pressure
69
What is the flowrate of the ultimatic branch
115 litres per minute
70
What is the throw of the projet 2 branch?
57 metres
71
How long is the roof ladder?
4.6 metres
72
What is the weight of the roof ladder?
14kg
73
What is the length of the three piece short extension ladder?
6m
74
What is the weight of the three piece short extension ladder?
21kg
75
What does the impellar do?
It's a rotating component that imparts kinetic energy to fluid
76
What does the volute do?
It converts the kinetic energy (from the impellar) into pressure energy
77
When water is being supplied from the appliance (with supply augmented from a hydrant), how much water can the pump deliver?
2700 litres per minute
78
What is the tank duration when using one hosereel?
12.2 minutes
79
What is the tank duration when using two hosereels?
7 minutes
80
How many litres per minute do two hosereels use?
200 litres per minute
81
What is the tank duration when using an RB101 branch at 230l/minute?
6 minutes
82
What is a pump?
A machine, driven by external power, that gives energy to fluid
83
When might you need to lift from open water?
When the hydrant supply is inefficient | When an area is flooded and its necessary to remove water
84
What are the factors that prevent water being lifted to 10metres
OFPITA ``` Overcoming Intertia Frictional Loss Pump entry loss Imperfect Vacuum Temperature Atmospheric pressure ```
85
How does temperature affect open water lifting?
The higher the temperature, the more difficult it is to lift
86
What is the primers minimum pump speed?
1200rpm
87
When lifting from open water, what could a decrease in pressure indicate?
A blocked strainer Internal collapse of hard suction Water level lowering
88
When lifting from open water, what could an increase in pressure indicate?
Loss of lift A leak in hard suction Water level increasing (tidal)
89
Where would you find the high pressure gauge?
In the middle of the three gauges
90
What would an increase on the high pressure gauge indicate?
Closed branch/branches
91
What would a decrease in pressure on the high pressure gauge indicate?
Open branch/branches
92
What is the third gauge on the pump (right hand side)?
The low pressure gauge
93
On the low pressure gauge, what would a decrease in pressure indicate?
Open branches | Burst branch length
94
On the low pressure gauge, what would an increase in pressure indicate?
Closed branch Reduced flow setting at the branch Blockage to delivery hose (likely debris or vehicle)
95
On a water relay, what is the maximum distance from the water source to the first appliance
3 lengths of hose
96
On a water relay, what is the maximum distance between pumps when using 70mm hose?
Flat ground - 8 lengths 10% gradient - 6 lengths
97
On a water relay, what is the maximum distance between pumps when using 90mm hose?
Flat ground - 15 lengths 10% gradient - 12 lengths
98
When pumping, if the bypass valve has been open, how much water is the appliance capable of pumping?
1000 litres per minute
99
What delivery gives less water
Delivery 1 gives 100 litres per minute less than 2 and 3 due to the internal plumbing
100
With a full tank of fuel in the appliance, how long can the pump operate?
4 hours
101
If the pump is supplying an aeriel appliance, can it supply water to another branch?
No, it must only supply the aeriel appliance.
102
On the compound gauge, what does the negative pressure measure?
It indicates the lift perametres between the surface of the water and the eye of the pump
103
What are the features of the pump?
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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