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Flashcards in Practice Questions Deck (103):
1

What is the British standard for a hydrant

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

2

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

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

3

What is the operating pressure of the RB101

Optimum 6 bar, but works between 3 and 6

4

What is the optimum pressure for the hosereel

35-40 bar

5

What are the flow settings for the RB101

130
230
300
400 litres per minute

6

What is a 90mm hosereel adaptor used for?

To attach a storz coupling to an instantaneous coupling

7

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

23 metres
15kg

8

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

23metres
9kg

9

What are the lengths of the 150mm hose?

5m
10m
50m

10

When is hose tested?

On acceptance
After use
Annually

11

What are the three purposes of appliance inventory

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

12

What should the pump operator do when overrunning the supply

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

13

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

1000 litres per minute

14

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

Closed branch
Kink in branch
Vehicle or debris on delivery hose

15

Define risk

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

16

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

40.6 kg
9m

17

What is the length and weight of the 135

13.5 m
100 kg

18

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

6m
21kg

19

What are the three ladder pitch checks

3-5 rounds above the sill

50mm clear above or below the sill

150mm (or less) from the sill

20

What are the three safety considerations when working on a ladder

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

21

What is a primer?

A device that is capable of pumping air

22

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

10m

23

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

8m

24

What are the 4 methods of applying hi-ex foam

Raindown
Indirect
Rolling-on
Gentle

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