Chapter 5 - Fire Pumps Flashcards
The most common type of fire pump is the _____________ type.
centrifugal
p 112
The ________________ _______-________ centrifugal pump is the most common of the split case types and is acceptable for use where water can be supplied to the pump under some pressure.
horizontal split case
p 113
A pump that needs ____________ is unacceptable where automatic pump operation is required.
priming
p 113
In the horizontal split case pump, the water pressure is increased due to the operation of a ________ inside the pump casing.
rotor
p 113
A _________-_______ pump is one with a single impeller.
single-stage
p 114
____________-________ pumps have the ability to deliver higher pressures and are commonly used to supply water to standpipes in high rise buildings.
Multiple stage
p 114
While 25 gpm fire pumps exist, it is rare to encounter pumps rated at less than _______ gpm.
500
p 114
There is no standard pressure rating for single stage horizontal split case pumps and they may be purchased with pressure ratings varying from _____ psi to ______ psi.
40 / 290
p 115
No standard fire pump is permitted to have a pressure rating less than ____ psi.
40
p 115
- Centrifugal pump similar to the horizontal split case, except that the shaft is oriented vertically and the driver is mounted on top of the pump.
Vertically mounted split case pump
p 115
This type of pump is still used where the water supply is from a nonpressurized source including wells, ponds, rivers and underground storage tanks ?
Vertical shaft turbine pumps
p 115
Vertical shaft pumps never require __________ because the rotating turbines are positioned down inside the water source.
priming
p 115
Vertical shaft turbine pumps
The number of ____________ is determined by the desired pressure rating - the more _____________ there are, the greater the pressure that will be developed.
impellers / impellers
p 115-116
These pumps are single stage pumps that have centerline suction and discharges. These pumps have pressure ratings from ____ to ____ psi, along with flow ranges of ____ to _____ gpm ?
End suction pumps / 40 to 150 / 50 to 750
p 117
This pump is a single stage pump designed to fit into the intake/discharge line with the driver located above the inline impeller. These pumps have a capacity up to _______ gpm and operating pressures up to _____ psi.
Vertical inline pumps / 1500 / 165
p 117
- Engine or motor used to turn a pump.
Driver
p 117
There are three types of drivers that are presently acceptable for use with fire pumps: ?
electric motors, Diesel engines, and steam turbines
p 117
The pump driver must have enough power to turn the pump at rated speed under all required load conditions, which include pumping at _______ and pumping at _____ percent of rated capacity.
churn / 150
p 117
A pump is said to be operating at ________ or ___________ when it is running but all discharges are closed.
churn / shutoff
p 117
Electric motors
For a 1000 gpm pump rated at 100 psi, a motor of about _____ hp would be needed.
80
p 118
A substantial advantage of the electric motor is the relatively small amount of _______________ required.
maintenance
p 118
Electric pumps should be turned on _________ and permitted to run for at least ____ minutes to ensure they are operating properly.
weekly / 10
p 119
Electric motors
Wiring installations providing power for the electric motors and controllers are required to comply with the provisions of NFPA ?
NFPA 70 National Electric Code
p 119
Although Diesel engines are usually more expensive than electric drivers, they may be a better choice because they do not rely on _________ ________.
external power
p 119