Chapter 7 - Standpipe and Hose Systems Flashcards
Because the fire pump discharge pressure necessary to reach the top floor of a 50-story building may be ______ to ______ psi, the proper operation of the standpipe system is critical.
350 to 400
p 172
____________ __________ continue to be the most effective method of fire control.
Automatic sprinklers
p 172
Which NFPA standard is used for the design and installation of standpipes ?
NFPA 14, Standard for the Installation of Standpipes and Hose Systems
p 172
Classes of Standpipes systems:
_______ __ standpipe systems are primarily for use by fire-suppression personnel trained in handling large hoselines.
Class I
p 173
A Class I system provides _____ inch hose connections or hose stations attached to the standpipe riser.
2 1/2
p 173
Classes of Standpipe systems:
The ______ ___ system is primarily designed for use by building occupants who are trained in its use or by FD personnel.
Class II
p 173
Classes of Standpipe systems:
These systems are equipped with 1 1/2 hose and nozzle and stored on a hose rack system ?
Class II
p 173
Classes of Standpipe systems:
The hose used in these systems is typically a single jacket type and equipped with a lightweight, twist-type shut-off nozzle ?
Class II
p 173
- Permanently fixed, private standpipe hoseline.
House Line
p 173
Classes of Standpipe systems:
This system provides 1 1/2 inch hose stations to supply water used by building occupants who have been trained and 2 1/2 inch hose connections to supply a larger volume of water used by FDs and those trained in handling heavy fire streams ?
Class III
p 173
Types of standpipe systems:
- ___________ ______ - This system contains water at all times. The water-supply control valve is open and pressure is maintained in the system at all times.
- Automatic wet
p 174
Types of standpipe systems:
- __________ ______ - This system contains air pressure to supervise the integrity of the piping. Water is admitted to the system through a dry pipe valve upon the opening of a hose valve. This system has a permanently attached water supply.
- Automatic dry
p 174
Types of standpipe systems:
- ______________ ______ - This is a standpipe system that is attached to a water supply that is capable of supplying the system demands at all times. It requires activation of a control device to provide water at hose connections.
- Semiautomatic dry
p 174
Types of standpipe systems:
- _________ ______ - This system does not have a permanent water supply. It is designed to have water only when the system is being utilized through the FDC.
- Manual dry
p 174
Types of standpipe systems:
- _________ _____ - There is no permanent water supply for this system, and water must be provided by the FD. It is maintained full of water from a small source for the purpose of detecting leaks in the system.
- Manual wet
p 174
Types of standpipe systems:
This system is the most desirable because water is constantly available at the hose station but cannot be used in cold environments ?
Automatic wet
p 174
In high-rise buildings with multiple zones, the upper zones may be beyond the height to which a fire engine can effectively supply water. This height is usually around ______ feet, depending on the available hydrant pressure and other factors.
450
p 175
Standard requirements specify that there shall be no _________ valve between the FDC and the standpipe riser.
shutoff
p 175
Each FDC is required to have at least _____ _____ inch connections or more as prescribed by the AHJ for fire department use.
two 2 1/2
p 175
FDC
In addition, there should be at least one _____ inch connection for each ______ gallons per minute of system demand.
2 1/2 / 250
p 175
The hose connection to the FDC typically have a _______ connection with National Hose Standard _________ and should be equipped with standard cap plugs, approved break away covers or locking caps.
female / threads
p 175
Two different factors to consider with regards to the use of water with standpipe systems are ?
water supply and water pressure
p 176
Water supply:
The water supply for Class I and Class III standpipe systems should provide _____ gpm for at least ____ minutes with a residual pressure of _____ psi at the most hydraulically remote 2 1/2 inch outlet.
500 gpm / 30 minutes / 100 psi
p 176
Water supply:
A minimum of ____ psi is required for the most remote 1 1/2 inch outlet.
65
p 176
Water supply:
If more than one standpipe riser is needed to protect a building, the water supply must provide _____ gpm for each additional riser to a maximum of ________ gpm for an unsprinklered building and _______ gpm for a sprinklered building.
250 / 1250 / 1000
p 176
Water supply:
For Class II standpipes, _____ gpm must be provided for at least _____ minutes with residual pressure of at least ____ psi at the highest outlet.
100 / 30 / 65
p 176
The current NFPA _____ minimum requirement for residual pressure is ____ psi for 1 1/2 inch hose connections and _____ psi for 2 1/2 inch hose connections.
14 / 65 / 100
p 176
What two considerations determine the size of the standpipe riser ?
height of the building and class of service
p 176
For Class I and Class III service, the minimum riser is ____ inches for building heights less than 100 feet and ____ inches for heights over 100 feet.
4 / 6
p 176
When Class I or Class III standpipe exceeds 100 feet in height, the top 100 feet is allowed to be ____ inch pipe.
4
p 176
Standpipes that are part of a combined system (those that include a sprinkler and standpipe) are ____ inches.
6
p 176
For Class II service, a riser should be ____ inches for a building height less than 50 feet. For a building over 50 feet in height, the minimum size riser is _____ inches.
2 / 2 1/2
p 176
Current system design practice is to locate standpipes so that any part of a floor is within _____ feet of the standpipe connection. This distance allows any fire to be reached with _____ feet of hose, plus _____ foot fire stream.
130 / 100 / 30
p 177
The actual standpipe hose connection can be located not less than ____ feet and not more than ____ feet from floor level.
3 / 5
p 177
In tall buildings the pressure on the system at the lower floors is so great it can make hoses difficult to handle. In these cases, ____________-___________ valves may be required to keep operating pressures below _____ psi.
pressure-reducing / 175
p 177
When one pump takes in water from the discharge of another, the pumps are said to be arranged in ?
series
p 177
In high rise buildings with several zones, the upper-zone pumps may be arranged to draft from tanks of the ?
upper floors
p 178
Water pressure:
The tanks, which hold several ___________ gallons of water, are filled automatically from the lower-zone fire pumps and/or the domestic water supply pumps by means of ___________ __________ valves.
thousand / automatic float
p 178
NFPA standards require a pressure-regulating device at a hose outlet that exceeds _____ psi for a 1 1/2 inch connection and _____ psi for a 2 1/2 inch connection.
100 / 175
p 178
Pressure regulating devices:
- ______________ ____________ devices - Consist of a simple restricting orifice inserted into the waterway.
- Pressure-restricting
p 178
Pressure-restricting devices are limited to systems with ____ inch hose discharges and _____ psi maximum pressure.
1 1/2 / 175
p 178
These devices are not preferred type because they do not control or reduce the water pressure in the system ?
Pressure-restricting devices
p 178
Pressure regulating devices:
Preferred for managing excessive pressure and considered to be the most reliable method of pressure control ?
Pressure-control valves
p 178
Pressure-control valves use a ______ _____ and ______ to read the pressure and automatically reduce the flow through the discharge.
pitot tube and gauge
p 178
Pressure regulating devices:
Preferred for managing excessive pressure and uses a spring mechanism that compensates for variations in pressure ?
Pressure reducing valves
p 179
A standpipe system is a significant component in a buildings ___________.
design
p 179
In high rise buildings the standpipe should be in _________ ____________ as construction proceeds to provide protection during construction.
partial operation
p 179
Initial installation inspection and testing:
- The system should be hydrostatically tested at a pressure of at least ______ psi for ____ hours to ensure tightness and integrity of fittings. If the normal operating pressure is greater than ______ psi, the system should be tested at _____ psi greater than its designed pressure.
200 / 2 / 150 / 50
p 179
Initial installation inspection and tests
- The system should be ______-__________ to remove any construction debris and ensure that there are no obstructions.
- flow-tested
p 179
Hose stations and connections should be checked to ensure that they are located in cases not less than ____ feet and not greater than ____ feet from the floor and are positioned so that the hose can be attached to the valve without __________.
3 / 5 / kinking
p 179
In service inspections:
- Dry systems are hydrostatically tested every ____ years.
5
p 181
