NFPA 25, CA Edition, Chapter 8.1-8.2 || With Error
NFPA 25, CA Edition, Chapter 8.1-8.2 || with Error
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NFPA 25, CA Edition, Chapter 8.1-8.2 || with Errorless Solutions 100%.
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NFPA 25, CA Edition, Chapter 8.1-8.2 || with Error
Institution
NFPA 25, CA Edition, Chapter 8.1-8.2 || With Error
A.8.1 What does a fire pump assembly do? What are its components? correct answers Provides waterflow and pressure for private fire protection. The assembly includes the water supply suction and discharge piping and valving; pump; electric, diesel, or steam turbine driver and control; and the auxili...
NFPA 25, CA Edition, Chapter 8.1-8.2 || with Errorless
Solutions 100%.
A.8.1 What does a fire pump assembly do? What are its components? correct answers Provides
waterflow and pressure for private fire protection. The assembly includes the water supply
suction and discharge piping and valving; pump; electric, diesel, or steam turbine driver and
control; and the auxiliary equipment appurtenant thereto
8.1.5 What auxiliary equipment shall the pump assembly include? correct answers Pump shaft
coupling,
automatic air release valve,
pressure gauges,
circulation relief valve,
pump test device(s),
pump relief valve and piping (where maximum pump discharge pressure exceeds the rating of
the system components or the driver is of variable speed),
alarm sensors and indicators,
right-angle gear sets,
and pressure maintenance (jockey) pump and accessories.
A.8.1.5 What are the types of centrifugal pumps? What are the ranges of rated capacities (gpm
and L/min) and net pressure (psi and bar)? correct answers Single and multistage units of
horizontal or vertical shaft design
25 to 5000 gpm (95 to 18,925 L/min)
40 to 400 psi (2.75 to 27.6 bar)
A.8.1.5 Describe a horizontal split case pump. correct answers Has a double suction impeller,
with an inboard and outboard bearing and is used with a positive suction supply. A variation of
this design can be mounted with the shaft in a vertical plane
A.8.1.5 Describe an end suction and vertical in-line pump. correct answers Can have either a
horizontal or vertical shaft with a single suction impeller and a single bearing at the drive end.
A.8.1.5 Describe a vertical shaft, turbine type pump. correct answers Has multiple impellers and
is suspended from the pump head by a column pipe that also serves as a support for the shaft and
bearings. This pump is necessary where a suction lift is needed, such as from an underground
reservoir, well, river or lake.
A.8.1.9 Describe the different types of controllers. correct answers Can be air-, hydraulic- or
electric-operated.
Can take power from the energy source for their operation, or the power can be obtained
elsewhere.
Controllers used with electric power sources can apply the source to the driver in one (across-
the-line) or two (reduced voltage or current) steps. Can be used with automatic and manual
transfer switches to select the available electric power source where more than one is provided.
, 8.1.6 At what gauge pressure shall the the suction supply for the fire pump provide the required
flow? correct answers 0 psi (0 bar) or higher at the pump suction flange
8.1.6 Are negative suction gauge pressures (which were permitted under NFPA 20 at time of
installation) in compliance with current code? correct answers They are in compliance if the
system demand still can be met by the pump and water supply.
8.1.1.2 How often should the pump be tested? correct answers No-flow condition (diesel) =
weekly
No-flow condition (electric) = monthly
Flow condition = annually
Fire pump alarm signals = annually
8.1.1.2 How often should maintenance be conducted on the pump? correct answers Hydraulic,
mechanical transmission, and motor = annually
Electrical system, controller & various components), and diesel engine system (& various
components) = varies
Lubricate pump bearings correct answers Annually
Check pump shaft end play correct answers Annually
Check accuracy of pressure gauges and sensors correct answers Annually;
Change or recalibrate when 5% out of calibration
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