General Knowledge Flashcards
What is the friction loss of 50’ 1 3/4 at 200 GPM?
15 psi
What is the friction loss of 50’ 2 1/2 at 350 GPM?
15 PSI
How many PSI per floor for friction loss?
5 PSI per floor or 10 ft
How to calculate friction loss for elevation without floors?
.5 x height in feet
What PSI do you pump sprinklers at?
125 PSI
What PSI do you pump standpipes at?
150 PSI in RPM mode plus 5 psi per floor not to exceed 200
What PSI do we pump cross lays and RAM?
140 PSI
When boosting what pressure do we pump at?
> 300’ commercial or >500’ any scene 150 PSI to 200 PSI
What pressure for automatic nozzles?
100 PSI
What pressure for chief nozzles?
75 PSI
What pressure for smooth bores?
50 PSI
What are the stats for the pro pack?
100 PSI is 12 GPM
What is the friction loss for appliances?
10 PSI
What is master stream friction loss?
25 PSI
What pressure do we pump master stream fog nozzle?
100 PSI
What pressure do we pump master stream smooth bore?
80 PSI
What is the coefficient for 1 3/4”?
15.5
What is the coefficient for 2 1/2”?
2
What is the coefficient for 5”?
0.08
How many guides should you use when backing an apparatus?
2
What percentage do we use for AR-AFFF for hydrocarbons?
3%
What percentage do we use for AR-AFFF for Polar Solvents?
6%
What PSI do we need at a foam educator?
200 PSI
What distances do we keep hoselines when using an educator?
100…no more than 200
What nozzles can be used for foam operations?
selecto-matic >35 ft or vindicator <35 ft
In a CO response, how far should you read meter from a CO appliance?
5 feet
At what reading should you inform occupants there’s no threat of CO?
<9 ppm
At what reading should premises be vacated and gas company called?
> 9 ppm but <70 ppm
At what CO ppm will firefighters wear scab’s to enter space?
50 ppm and greater
What happens at 70 ppm CO?
occupants must be evaluated by EMS
What are two things all CO runs must have before clearing?
carbon monoxide detector activation & checklist for carbon form completed
During a natural gas leak what’s the initial staging distance?
330’ from address
At what LEL is entry contraindicated on a gas call?
10% lel
When reporting a gas call involving an excavator what is needed info?
Buds#, name, and company info
What are the specs of FFD crosslays?
200’ of 1 3/4” with chief nozzle pumped at 200gpm @ 75 psi
What is the total length allowed for 1 3/4?
250’ NFPA
If a chief nozzle is broken down to 1” tip what is the flow?
212gpm @ 50 psi vs 200gpm @ 75 psi
On E3 and E4 what lines can flow Class A foam?
two crossways and the bumper line
What percentage is onboard Class A foam used per SOP?
.5% to 1%
How would you describe the bumper line at FFD?
100’ 1 3/4 with select o matic
At 140 psi pump pressure what GPM does the Selecto matic operate at?
200 GPM at 100 PSI
What configuration is the RAM loaded in?
200’ of 2 1/2” flowing @ 500 gpm at 75 PSI
What are the optimal pressures for the deck gun?
80 psi stacked tips or 100 psi combination nozzle. Both are around 1000 gpm
What does the 2 1/2” on A1 or E2 get pumped at?
100 PSI-110 PSI
What PSI should the intake never drop below while supplying water?
20 PSI
What is the optimal pressure for the propak?
100 psi at 12 GPM
What is the PDP when pumping a yard lay with one or two landlines and smoothbores?
110 PSI
What is the PDP if operating a Yardlay with the 1 3/4” crosslay and chief nozzle?
140 PSI +15 PSI for 200’ 2 1/2” so -155 PSI.
