Flashcards in Practice Questions Deck (103):
What is the British standard for a hydrant
1.7 bar pressure
65mm round thread anti clockwise opening
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
What is the operating pressure of the RB101
Optimum 6 bar, but works between 3 and 6
What is the optimum pressure for the hosereel
What are the flow settings for the RB101
400 litres per minute
What is a 90mm hosereel adaptor used for?
To attach a storz coupling to an instantaneous coupling
What is the length and weight of a 70 mm hose?
What is the length and weight of a 45mm hose?
What are the lengths of the 150mm hose?
When is hose tested?
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
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
When the bypass lever has been activated, how much water is the pump capable of pumping
1000 litres per minute
When pumping, what could a sudden increase in pressure indicate?
Kink in branch
Vehicle or debris on delivery hose
The measure of LIKLIHOOD that the harm from a particular hazard will occur, and the possible SEVERITY of the harm
What is the weight and length of the 9 m ladder?
What is the length and weight of the 135
What is the length and weight of a short extension ladder?
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
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
What is a primer?
A device that is capable of pumping air
What is the theoretical maximum lift when lifting from open water?
What is the practical maximum lift when lifting from open water?
What are the 4 methods of applying hi-ex foam
What are the two types of water relay
Open and closed
What is the respiratory protective equipment number?
How does the body dissipate heat?
What are the physical effects of heat stress
What sizes of soft suction are available?
What is the single most important factor affecting pressure loss?
Diameter of hose
When lifting from open water, what would a compound gauge of -0.2 indicate?
A lift of 2 metres
What is the length of the hard suction hose?
How many lengths of hosereel are carried on the appliance?
What are the two types of pump
Centrifugal (pumps fluid)
Positive displacement (pumps air)
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
What are the visible symptoms of heat stroke?
Loss of consciousness
Lack of sweating
What does the compound gauge indicate?
It records both positive and negative pressures.
A vacuum reading (negative pressure) when lifting from open water
When should the compound gauge be monitored
Constantly during pumping operations
What is the weight of the roof ladder?
What is the length of the roof ladder (when unfolded)
How long is a guideline?
How long is a personal line, when fully extended
How long is a personal line (not fully extended)
How many guideline tallies are carried on a pump ladder?
2 (A and B)
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
Relief teams required at larger incidents
More than 1 ECB
When GTS workers are out of sight
Telemetry leaky feeder
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.
When is an A test performed?
When nominated to test a spare
When taking over a set
Following respirator use
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
When charged, how much should a hose stretch, both in length and diameter?
5% in length
10% in diameter
What two leak detection devices might be encountered in a hydrant?
Screw on or magnetic
When is a hydrant tested?
Yearly visual check
Every 4 years tested manually
Between April and October
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
What branches are carried on a frontline appliance?
Ultimatic hosereel branch
What is the length and weight of the 45mm hose?
What is the length and weight of the 70mm hose?
What is the length and weight of the 90mm hose?
What is the internal diameter of the hosereel hose?
What is the diameter of the hard suction
How many lengths of hard suction are carried on an appliance
How many litres of water can be held in the appliance tank?
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
Who maintains hydrants?
The local water authority
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
What are the available flowrates when using the akron ground monitor with the deluge nozzle?
1750 litres per minute
What are the available flowrates when using the akron ground monitor with the foam nozzle?
950 litres per minute
How should water supply the ground monitor?
Directly with a 70mm hose
What is the optimum pressure of the ground monitor?
What is the effective working pressure of the projet 2 branch?
Between 3.5 and 7 bar pressure
What is the flowrate of the ultimatic branch
115 litres per minute
What is the throw of the projet 2 branch?
How long is the roof ladder?
What is the weight of the roof ladder?
What is the length of the three piece short extension ladder?
What is the weight of the three piece short extension ladder?
What does the impellar do?
It's a rotating component that imparts kinetic energy to fluid
What does the volute do?
It converts the kinetic energy (from the impellar) into pressure energy
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
What is the tank duration when using one hosereel?
What is the tank duration when using two hosereels?
How many litres per minute do two hosereels use?
200 litres per minute
What is the tank duration when using an RB101 branch at 230l/minute?
What is a pump?
A machine, driven by external power, that gives energy to fluid
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
What are the factors that prevent water being lifted to 10metres
Pump entry loss
How does temperature affect open water lifting?
The higher the temperature, the more difficult it is to lift
What is the primers minimum pump speed?
When lifting from open water, what could a decrease in pressure indicate?
A blocked strainer
Internal collapse of hard suction
Water level lowering
When lifting from open water, what could an increase in pressure indicate?
Loss of lift
A leak in hard suction
Water level increasing (tidal)
Where would you find the high pressure gauge?
In the middle of the three gauges
What would an increase on the high pressure gauge indicate?
What would a decrease in pressure on the high pressure gauge indicate?
What is the third gauge on the pump (right hand side)?
The low pressure gauge
On the low pressure gauge, what would a decrease in pressure indicate?
Burst branch length
On the low pressure gauge, what would an increase in pressure indicate?
Reduced flow setting at the branch
Blockage to delivery hose (likely debris or vehicle)
On a water relay, what is the maximum distance from the water source to the first appliance
3 lengths of hose
On a water relay, what is the maximum distance between pumps when using 70mm hose?
Flat ground - 8 lengths
10% gradient - 6 lengths
On a water relay, what is the maximum distance between pumps when using 90mm hose?
Flat ground - 15 lengths
10% gradient - 12 lengths
When pumping, if the bypass valve has been open, how much water is the appliance capable of pumping?
1000 litres per minute
What delivery gives less water
Delivery 1 gives 100 litres per minute less than 2 and 3 due to the internal plumbing
With a full tank of fuel in the appliance, how long can the pump operate?
If the pump is supplying an aeriel appliance, can it supply water to another branch?
No, it must only supply the aeriel appliance.
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