IFSTA Apparatus Operator Flashcards
How many gallons does it take to be a mobile water supply
1,000 gallons
What is the minimum pump capacity for a pumper
750 gpm
What is the minimum pump capacity of an aerial apparatus
250 gpm at 150 psi
What is the difference in a converter and alternator
Alternator converts AC into DC for use by the engine, inventor converts DC to AC for use by personnel
How do you check the water level in the tank
Visually
What grade should the parking break be able to hold the apparatus
20%
When driving 5 miles per hour, what’s the max stopping distance allowed
20 feet
Traffic accidents are the second leading cause of traffic accidents?
Yes
When do most accidents occur
During ideal vision and road conditions
Curves and downhill, when do you downshift
Before entering the curve or downhill
Per IFSTA how many backers should be used
2
When is driving into oncoming traffic not recommended
When traffic cannot see you for any reason
What is total stopping distance
The sum of reaction distance and vehicle breaking distance
The most common cause of skids involve what
Driver error
How much does snow and ice increase the stopping distance
3-15 times
At what speed will apparatus outrun the siren
50 mph
Ow should apparatus be positioned if front suction is being used
45 degree angle
How is tandem pumping different than relay pumping
Engines are parked closely together instead of evenly spaced, other than that it is the same
In dual pumping how are apparatus set up? Tandem?
Dual pumping, intake to intake.
Tandem, discharge to intake
How do you calculate head pressure
Height of the water above discharge divided by 2.304
What is the minimum flow setting for interior firefighting
95-100 gpm
What is the discharge rate for a 21/2 and 4 inch outlet
250 and 625 gpm
In a two stage pump what is most effective for cooling
A circulator valve, the tank fill may only come off the first stage of the pump, causing heat buildup in the second stage
Valves over three inches need what
Slow acting valve control over 3 seconds
The pressure relief valve does not allow how much of a pressure spike
Will not exceed 30 psi above the set pressure of the relief valve
Per IFSTA when should the apparatus be choked
Every time the apparatus is stopped with the engine running and the operator out of the cab
When should a two stage pump be switched from pressure to volume
When it appears that over 50% of the rated capacity of the pump is going to be used
What is the first step in choosing a hydrant
Choose the most appropriate hydrant
How much does atmospheric pressure decrease as elevation increases
.5 psi for every 1,000 feet in elevation
Three things in consideration when selecting a draft site
Amount of water, type of water, accessibility of waters
Per IFSTA how much water should be over the strainer when drafting in order to reach max capacity
2 feet all around the strainer
What should you do to the pump after drafting
Flush with cleans water
What is the most common type of contamination in water
Sand or dirt
At twenty feet above the water source when drafting, what is the capacity of the pump
60 percent of it’s rated capacity
What is the most common cause of inability to draft
Air leak
Equation for evaluating the flow in a small stream
Flow = A x V x 7.5
A equals width times the depth
V equals velocity if feet per second
How close to the desired pressure should your relief valve be set
With 10 psi
What is relay pumping based on
Amount of water needed and distance
Where does a relay evolution always begin
With the source pumper
Where does the relay pumping begone it’s shut down
Attack pumper
What are the two primary means of getting water to remote areas
Relay pumping and water shuttle
Which is safer, relay pumping or water shuttle
Relay pumping
What is needed for a water shuttle operation
Pumper sand water tenders
What three things must a water tender be able to do
Discharge water at 1,000 gpm average, one direct fill port, a tank to pump valve that can give 500 gpm to the pump
What are the three things to consider before starting a water shuttle
Location of dump site, location of fill site, and route of travel
What does IFSTA recommend regarding fill site operations
A pumper be used to fill tenders at all sites even if a hydrant or static water source is used
How should flow through LDH hose be controlled
At the pumper, not by a hose clamps
What is the proffered arrangement of setting up multiple portable tanks
Diamond shape
What is the acceptable amount a coupling is allowed to slip during hose testing per IFSTA
No more than 3/8 of an inch
