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29 Cards in this Set
- Front
- Back
Type A fires are |
Wood, paper etc |
|
Type B fires are |
Flammable liquids |
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Type C fires are |
Electrical |
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What is the fire sprinkler codes |
NFPA 13D |
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List the seven advantages of sprinkler systems |
Saves lives Saves property Overall fire protection Good for business Lower insurance premiums Increase property values Cost efficient |
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What are the three sprinkler system types |
Dry Wet Pre-action |
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Explain Dry system |
Contains only pressurized air |
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Explain wet system |
Always full of pressurized water |
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Explain Pre-action |
Contains air that may/may not be under pressure and requires double signal to activate |
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There are two temperature ratings for residential sprinklers |
Ordinary - 135 to 170F Intermediate - 175 to 225F |
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What are the three styles of sprinklers |
Pendant Sidewall Upright |
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What materials may be used in piping |
Copper K L M CPVC Cross linked polyethylene PEX |
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Materials should be rated at |
175 psi at 120F |
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PEX piping should be supported |
Every 32in including 6in from ends |
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What is the minimum pipe size |
3/4in |
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When a sprinkler has multiple supplies, what is the minimum size |
1/2in |
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A sprinkler system should have a minimum supply of water of |
30min |
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The four sources of water are |
Water mains Elevated storage tank Pressure tank that meets NFPA Storage tank with automatic pump |
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What is the minimum protection required for piping |
3/8in drywall |
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What are the three types of fire detectors |
Smoke Thermal Flame detector |
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Smoke detectors detect the earliest stages of fire. They can be either |
Ionization or photoelectric |
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Thermal detectors have the lowest number of |
False alarms |
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Thermal detectors come in three types of detection |
Fixed temperature Rate of rise and fixed Rate anticipation |
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Flame detectors use |
Electromagnetic waves |
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There are two types of water flow alarms. They are |
Water flow alarm signal Pressure operated electric switch |
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Sprinkler system must be hydrostatically tested at |
200psi or 50psi in excess of the operating pressure whichever is greater for at least 2hr |
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The minimum distance between sprinklers is _____ max______ |
8ft 12ft |
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The maximum coverage area of a sprinkler is |
144in2 |
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The distance from ceiling to sprinkler deflector is |
1 to 4in |