Chapter 15 - Apparatus Testing Flashcards
Pre-service testing includes _________, ________, and __________.
Manufacturer’s tests, Pump certification tests, acceptance tests
During manufacturer tests, the apparatus being tested much meet the following minimum standards:
> The apparatus must accelerate to 35 mph from a standing start within 25 seconds.
The apparatus must achieve a maximum top speed of 50 mph.
The apparatus must come to a full stop from 20 mph within 35 feet
The parking brake installed on the vehicle must conform to the specifications listed by its manufacturer.
The pump body as well as the entire intake and discharge piping system, with exception of the tank fill and tank-to-pump lines on the tank side of the valves, are subjected to a minimum hydrostatic test pressure of ____ psi for a minimum of ___ minutes.
500 psi for 10 min
The NFPA 1901 standard requires the following certification tests be conducted for apparatus equipped with a fire pump of 750 gpm up to 3,000 gpm: (10)
> Engine Speed Check > Pumping > Pumping Engine Overload > Pressure Control System > Priming System > Vacuum > Water Tank-To-Pump > Engine Speed Interlock > Gauge and Flowmeter > Manufacturer's Predelivery
The requirements for fire department service testing are contained in NFPA 1911. Based on this standard, a pumper must be performance tested at least _______, or whenever it has undergone major pump or powertrain repair.
Once a year.
NFPA 1911 Performance testing includes: (11)
> Engine Speed Check > Pump Shift Indicator > Pump Engine Control Interlock > Priming System > Vacuum > Pumping Test for Fire Pumps > Overload > Pressure Control Test for Fire Pumps > Intake Relief Valve System > Gauge Test Flowmeter > Tank-To-Pump Flow
The water level of the static source must be at least ___ feet deep, with the strainer submerged at least ___ feet below the surface.
4 ft
2 ft
The distance of the centerline of the pumper intake above the surface of the water is based on its capacity. For pumps rated at _____ gpm or less, ___ feet is the maximum distance, while _____ gpm pumps use a ___ foot maximum lift
<= 1,500 gpm - 10 ft max lift
2,000 gpm - 6 ft max lift
A __ in drop in barometric pressure reduces static lift of a pumper by approximately __ ft.
1 in drop
1 foot
During hose testing, if the scribe mark is found to have moved away more than ____ of an inch from the coupling, stop the test and replace the hose.
3/8 in
Performance tests are conducted at ____ psi, ____ psi, ____ psi, and ____ psi net pump discharge pressure.
150
165
200
250
Pressure correction formula
PC = (Lift + Total intake Hose Friction Loss) / 2.3
According to NFPA 1911, fire pumps of _____ gpm capacity must achieve prime in ___ seconds or less, and those ratted at _____ gpm must be primes within ___ seconds. Additional specifications offer increased time based on the size of intake piping.
1,250 gpm - 30 sec
1,500 gpm - 45 sec
The difference in readings between the flowmeter and pitot gauge must not be more than ___ percent.
10%
Pumpers with an onboard tank capacity of ____ gallons or less must be capable of flowing ____ gpm from their onboard tank. Pumpers with a capacity of greater than ____ gallons must be capable of flowing at least ____ gpm
<= 500gallons - 250 gpm
> 500 gallons - 500 gpm
