Fire protection Systems Flashcards
What is the role of a nationally recognized testing laboratory?
To test the components of a system to ensure operational reliability
Examples of recognized laboratories include Underwriters Laboratories Inc. (UL), FM Global, and Intertek (ETL Listed Mark).
Name three examples of nationally recognized testing laboratories.
- Underwriters Laboratories Inc. (UL)
- FM Global
- Intertek (ETL Listed Mark)
These laboratories are known for their testing and certification services.
True or False: Testing by a nationally recognized laboratory is optional for ensuring operational reliability.
False
Testing by such laboratories is essential for guaranteeing the reliability of system components.
Fill in the blank: A _______ is responsible for testing components of a system to ensure operational reliability.
[nationally recognized testing laboratory]
Examples include UL, FM Global, and Intertek.
What codes should the installation of the system conform to?
The installation should conform to NFPA® 70, National Electrical Code®; NFPA® 72, National Fire Alarm and Signaling Code, and local codes and ordinances.
What are some basic components found in fire detection and alarm systems?
Basic components include fire alarm control units (FACUs), primary and secondary power supplies, initiating devices, and notification appliances.
What is the fire alarm control unit (FACU)?
The FACU contains the electronics that supervise and monitor the integrity of the wiring and components of the fire alarm system.
What was the former name of the fire alarm control unit?
The FACU was formerly called the fire alarm control panel (FACP).
What is the primary function of the FACU?
The FACU serves as the brain for the alarm system, receiving and processing signals from alarm initiating devices.
What does the FACU do with the processed signals?
It produces output signals that activate audible and visual appliances and transmit signals to an off-site monitoring station when provided.
How are power and fire alarm circuits connected in the system?
Power and fire alarm circuits are connected directly into the FACU.
What other components are considered part of the fire alarm system?
Remote auxiliary fire control units and notification appliance panels are also part of the fire alarm system and are connected and controlled by the FACU.
A minimum of a _____ supply of stored water is required for systems designed in accordance with NFPA 13D.
10 minute
If structures are less than _____ in area and no more than _____ in height, the minimum quantity of water is based on the flow rate for two sprinklers multiplied by _____ minutes of operation
2,000 square feet; one story; seven
In residential structures, such as hotels and motels that are four stories or less, NFPA 13R requires a minimum of a ____ supply of water
30 minute
Minimum flow requirement from an individual sprinkler for residential protection is
18 gpm
Storage facility classification:
Generally noncombustible and stored on wood pallets in ordinary packaging. Can be packaged in corrugated cardboard or stretch-wrapped as a unit load
Class I
Storage facility classification:
Noncombustible commodities but packed in wooden crates or multilayered cardboard cartons.
Class II
Storage facility classification:
Combustible materials, such as wood, paper, or certain plastics, regardless of packaging
Class III
Storage facility classification:
Class 1,2, or 3 products that contain limited amounts of Group A plastics.
Class IV
Hangers supporting sprinkler piping must be capable of supporting ___ the weight of the water-filled pipe, plus ____
5 times; 250 lbs
In dry systems, the air-water differential allows a small amount of air pressure to hold back the water. The differential is generally between a____ to____ ratio.
3:1 to 7:1
Quick-opening devices are required on any dry-pipe system with a capacity of more than ___ if the system cannot meet the water delivery time requirement, and on any system with a capacity greater than ___
500 gallons
750 gallons
The water supply for Class I and Class III standpipe systems should provide ____ for at least ____ with a residual pressure of ___ at the most hydraulically remote 2.5 inch outlet. A minimum of ___is required at the most remote 1.5 inch outlet.
500 gpm; 30 minutes; 100 psi; 65 psi
If more than one standpipe riser is required in a building, the water supply must provide ____ for each additional riser to a maximum of ____ for an unsprinklered building and ____for a sprinklered building.
250 gpm; 1,250 gpm; 1,000 gpm
For class II standpipes, ____ must be provided for at least ____ with a residual pressure of at least ____ at the most hydraulically remote outlet
100 gpm; 30 minutes; 65 psi
NFPA standards require a pressure-regulating device at a hose outlet that exceeds ___ for a 1.5 inch connection and ____ for a 2.5 inch connection
100 psi; 175 psi
Water and Potassium carbonate, potassium citrate, or potassium acetate are typically used as
Wet chemical fire suppression agents
Also known as ordinary dry chemical; effective on Class B and Class C fires
Sodium bicarbonate
Also known as multipurpose dry chemical, is effective on Class A, B, and C fires. It is the most corrosive of dry chemical agents and can have a corrosive effect on unprotected metals
Monoammonium phosphate
Clean agent that when discharged is a rapidly evaporating liquid. Does not conduct electricity, making it suitable for Class C fires. Has a limited Class A rating
Halotron
Hydrofluorocarbon considered to be an acceptable alternative to Halon 1301 because it leaves no residue and is not harmful to humans and the environment. This agent does require significantly more agent for effective extinguishment than Halon 1301
FM-200
Hydrofluorocarbon is a safe, clean, and electrically nonconductive agent suited for use at low temperatures.
Ecaro-25
Blend of three naturally occurring gases: nitrogen, argon, and carbon dioxide. Used as a clean extinguishing agent
Inergen
Halon replacement that is stored in a liquid state but converts to a gas when discharged through a nozzle
Novec 1230
CO2 systems are available in high-pressure and low-pressure systems. In high pressure systems the CO2 is stored at about ____psi.
850 psi
A low pressure CO2 system is designed to protect much larger hazards. The liquified CO2 in these systems is stored in large, refrigerated tanks at ____psi at a temperature of ____
300 psi; 0 degrees Fahrenheit
