5. The Fire Pump Flashcards
A centrifugal pump is capable of only pumping ___
Fluids
The fire pump must be capable of delivering a minimum capacity of 250 to 3000 gpm at ___ psi
150
+3000 gpm at 100 psi
Pump and roll
20 gpm at a gauge pressure of 80 psi while the apparatus is moving at a speed of __ mph
2mph
100% of the rated capacity at ___ psi with a net pump pressure from draft through ___ feet of suction hose with a strainer at an atmosphere of 1000 feet above sea level
150 psi
20 ft
All water tanks should be equipped with a baffling system with a minimum of two transverse or longitudinal vertical baffles that cover at least ___% of the area of the plane that contains the baffle
75%
___ Pump is in ideal choice for use as a priming pump for centrifugal pumps
Positive displacement
Specific volume of fluid per pump revolution
___ pump are typically used as the priming pump for a centrifugal pump
Type of positive displacement pump
Rotary
pump most commonly used today is the ___ pump
Centrifugal
The most common type of multi stage pump is the __ pump
Two stage pump
At the discharge side of the first impeller, a ___ valve directs the water to either the pumps discharge header or the intake side of the second impeller
Transfer
The two broad Classifications of positive displacement pumps for firefighting purpose are
Piston pump
Rotary pump
Pump intake gpm
Tank < 500 gallons
Tank > 500 gallons
250 gpm
500 gpm
The tank to pump piping also contains a ___ valve which allows water to flow only from the tank into the pump, and not back inside the tank
Check
Each intake valve that has a connection larger than 3 inches must be equipped with an adjustable ___ ___ ___ ___ ___
Automatic intake pressure relief device
90-185 psi
Each intake valve must be equipped with a ___ valve to remove any air trapped in the house before it enters the centrifugal fire pump
Bleeder
Master “pump intake” pressure gauge must be capable of reading ___ inch Hg vacuum to at least a gauge pressure of ___ psi
30
300
The master pump discharge gauge must be located within __ inches of the master pump intake gauge
8 inches
“Pump discharge” must be at least __ inch larger then all other discharges.
1 inch
Digital master pressure gauges must have
+|- 3% accuracy over the full scale
0.5 inch
Increments of not more then 10 psi
Pressure governor
The system must automatically control the pump pressure to a maximum of __ psi pressure rise no faster than ___ seconds and no slower than ___ seconds from the time the pressure surge is detected
30
3
10
The most common type of power system found in pumps is the ___ ___
Transfer case
