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33 Cards in this Set
- Front
- Back
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All residential sprinklers within a compartment must have a temperature rating within what degree of one another? |
10 degrees |
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Attic sprinklers can used in what? |
With attics pitches from 4:12 to 12:12 |
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What is used on a butterfly valve to prevent the valve from being opened or closed to quickly? |
A gear operator. |
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What type of valve has a round disc that fits tightly in its mating seat and rotates 90° and one direction to open and allow fluid to pass through the valve? |
Butterfly valve |
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What kind of valve provides less resistance to flow than globe valves? |
Ball valve |
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What two sizes of hose valves are most common? |
1 1/2" and 2 1/2" |
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What is the maximum inlet pressure allowed for pressure reducing valves that reduces pressure under flow conditions only? |
175 PSI |
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The pressure gauge located above the clapper of the alarm valve indicates____? |
System pressure |
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When water pressure varies a great deal, and a retard chamber is not significant to prevent false alarms, what other device can be used? |
An excess pressure pump |
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An auxiliary drain should consist of a nipple and cap or brass plug not less than 1/2" in size when the capacity of trapped section of pipe is what? |
5 gallons or less |
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What is the recommended amount of pipe that should be exposed in the warm area to prevent freeze damage where a test pipe extends through a wall? |
Not less than 4 ft. |
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The term hydraulically tested means |
A system has been tested with water |
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Unobstructed construction includes |
Bar joist |
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What is the maximum distance between standard sprinkler in light hazard? |
15 feet |
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What is the minimum distance for a sprinkler can be from a wall? |
4" |
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In unobstructed construction, the deflector distance below the ceiling is what? |
1 to 12 inches |
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A sidewall sprinkler installed under a slope ceiling must be located where? |
Located at the high point of the ceiling and positioned to discharge downward |
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The sum of 1 3/4, 6 3/8, 1 23/32 |
9 27/32 |
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What is the square footage of 8 ft 6 in x 10 ft 9 in |
91. 375 square feet |
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For every foot of vertical rise the head pressure conversion factor is what? |
. 433 |
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The minimum allowable operating pressure applied to a standard sprinkler is |
7 PSI |
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The reflected ceiling plan view of a blueprint will not show? |
Rough contours |
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Information on any changes that have been made to the drawing will be located in the what? |
Revision block |
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What is the maximum allowable sprinkler spacing for a hydraulically calculated system in a building, used for high piled storage, with combustible obstructed ceiling construction? |
100 sq. ft |
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The maximum unsupported length on the end of a branch line with 1" schedule 40 steel pipe? |
36" |
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What is the maximum distance between hangers on 1" and 1 1/4" schedule 40 steel pipe? |
12 feet |
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In fire protection work, the decision point for dry sprinkler system versus what is set at what temperature? |
40° F |
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What is the maximum allowable working pressure for a sprinkler system? |
175 PSI |
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A pressure measured on the water supply under no fire flow condition is called what? |
Static pressure |
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Properly installed surface tanks require what? |
Concrete foundation, pressure relief provision, pump and lighting protection. |
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A pit must be large enough to hold all the equipment to be installed into it in addition it should be what |
Have an access port adequate to allow servicing and replacing of the device within it. |
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The basic NFPA standard for classification of standpipes is what |
NFPA 14 |
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If a 45° offset is 5 ft the rise or run is |
3' 6 1/2" |
