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Sprinkler Systems Installer Period 2 > Final Review > Flashcards

Final Review Flashcards

1
Q

Elements of fire and how to put out a fire

A

Fire triangle - oxygen, heat, fuel

smother, cool, remove fuel, remove an element of fire triangle

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2
Q

Classes of fire

A

A – ordinary combustibles, B-flammable liquids, C-electrical, D-metals, Ksubclass of B, or kitchen fires

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3
Q

flame spread rating- what is it based off of

A 
Based off how fast red oak burns red oak 
FSR=100, FSR 1/A=1-25, 2/B=26-75,
3/C=76-200
Class1 is less flammable than class 3
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4
Q

types of piping arrangements

A

tree, grid, loop

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5
Q

FD connections sizes - fire engines, boat, hyd calc’d, risers < 3”

A
  • Fire engines min 4”
  • Min 6” for boat
  • If hyd calc’d can be 4” but not smaller than the riser
  • If riser is < 3” you only need one input
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6
Q

power line approach procedures

A

If within 20’/7m required to call operator to determine voltage and distances.

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7
Q

fall arrest distances

A

10’ or lower when above dangerous situation, 6’ with shock absorber and 4’6” without
shock absorber

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8
Q

underground and trenching requirements

A

1.5m requires cutting back/shoring, box or cage, not required in solid rock

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9
Q

High pH vs low pH effects on piping

A
  • high pH=mineral buildup

- low pH=pipe corrosion

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10
Q

equal spread offsets

A

Equal offsets have equal distances between runs and travels, solve with 22.5
degree triangles, the fitting don’t line up

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11
Q

unequal spread offsets

A

Unequal don’t have the same distance between the pipes on the runs vs travels, solve with 45 triangles and fittings line up

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12
Q

toeboards

A
  • 6’ above permanent

- 11’ when above temporary

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13
Q

hanger support and spacing requirements

A

HANGER - 5x waterfilled pipe + 250 lbs structure

STRUCTURE - weight of waterfilled pipe + 250lbs

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14
Q

power line approach procedures

A

If within 20’/7m required to call operator to determine voltage and distances.

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15
Q

grade formulas

A

rise = grade x run

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16
Q

sprinklers and ABC

A

NFPA provided minimum standard adopted by ABC and AFC. Standpipe requirements are changed - 500gpm per ABC, in NFPA its 500 + 250 up to 1000 or 1250, sprinklers can’t be omitted on top floor per ABC

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17
Q

scaffolding requirements - weight
guardrails
bracing

A

Designed for 4x load, height < 3x smallest base dimension < 2x when workers are on; flat
level surface, guardrails @ 36-42” when > 10’, bracing at 15’vertical and 21’horizontal

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18
Q

Division of ABC

A

A-compliance, objectives and functional statements, B-Acceptable Solutions, C- Administrative provisions

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19
Q

Purpose of ABC

A

Establish standards while a building is being built - Safety in Health, Accessibility, Environment, Protection, safety

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20
Q

What’s a STANDATA?

A

Variance information, is provided when changes or additional information is required with the codes or acts.

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21
Q

Stages of fire

A

Incipient, smoldering, flame, heat

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22
Q

What’s a STANDATA?

A

Variance information is provided when changes or additional information is required with the codes or acts.

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23
Q

Stages of fire

A

Incipient, smouldering, flame, heat

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24
Q

Flushing requirements

A

10’/sec until flows clear

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25
What is pressure head?
the pressure available at any point in a | system given in feet
26
cross connections - what are they? describe the types | What is backflow?
-backpressure-higher system than supply pressure -backsiphonage - negative or reduced pressure on supply Backflow is when connections between potable and non-potable water, unwanted flow in a reverse direction
27
Sprinkler components pressure requirements
175psi, underground | 150psi
28
types of water supplies
public, private and non-potable/raw
29
causes of corrosion
pH of water, MIC, oxygen, oxidizing agents, turbulent flow, carbonic acid, metal characteristics, dissolved solids, temperature, electrolysis, flow velocities
30
water properties - states of water
pH7=neutral, <7 =acidic, >7= alkaline or basic, water contain oxygen and corrodes piping, water is densest at 4 degrees C/39 degrees F, exists in 3 states, flows from high pressure to low pressure, smaller pipe=greater friction loss
31
Flushing requirements
10’/sec until flows clear. | 1 1/4" fittings easily removable on cross mains
32
overhang and armover hanging rules
3/4/5 rule 1" = 3' 1 1/4" = 4' 1 1/2" = 5'
33
Sprinkler components pressure requirements
aboveground- 175psi, | underground -150psi
34
overhang and armover hanging rules
``` 3/4/5 rule 1" = 3' 1 1/4" = 4' 1 1/2" = 5' unsupported up to 24", 12" if copper. If PSI > 100 cut in half. ```
35
testing requirements
Annually, at initial install, after repairs/maintenance/modifications
36
gravity tanks purpose
best limited water supply
37
seismic bracing requirements
Long = max spacing 80, max 40' from end Lat = max spacing 40, max 6’ from end 2’ from end can be both lat and long Required on branch lines >2 ½” and on all mains and cross mains
38
What is pressure head?
the pressure available at any point in a system given in feet
39
Gravity tank full size and time
min 2" and 8 hours
40
PIV distance from building | post indicator valve
Min. 40' from building
41
Fill time pressure tank
4 hours
42
Maximum areas of coverage by one system riser
Light hazard - 52 000 sq ft Ordinary hazard 52 000 sq ft Extra hazard(pipe scheduled) - 25 000 sq ft Extra hazard (hydraulically calculated) - 40 000 sq ft
43
Light hazard
low combustibility/low heat. Low risk. ex. office, schoolrooms, churches
44
Ordinary hazard
moderate fires.Medium risk. Ex. mercantile storage, parking garages, and light manufacturing plants. Group 1: low combustibility, moderate quantity, stockpiles < 8' Group 2: quantity and combustibility moderate to high, stockpiles(moderate) < 12", stockpiles(high) < 8'
45
Extra hazard group 1
quantity + combustibility are very high. High rates of heat release. NO FLAMMABLE LIQUIDS.
46
Extra hazard group 1
quantity + combustibility are very high. High rates of heat release. NO FLAMMABLE LIQUIDS. Ex. woodworking, aircraft servicing, warehouses and high-piled stock
47
Extra hazard group 2
Moderate to substantial amounts of flammable or combustible liquids. Ex. woodworking, aircraft servicing, warehouses and high-piled stock
48
pre-action systems
single interlock - detection device non-interlock - either detection device or sprinkler double interlock - both
49
foam system
three levels - low, medium, and high.
50
CO2 systems and other gas extinguishing systems
C02, fm200, Inergen, Saphire. | Local application, total flooding, hand hose line system.
51
CO2 systems and other gas extinguishing systems
C02, fm200, Inergen, Saphire. | Local application, total flooding, hand hose line system.
52
water mist
``` cooling, radiant head blocking and local oxygen inerting local, total compartment, zoned single fluid, twin fluid low: 1 -200 psi Intermediate 201-500 psi High: > 501psi ```
53
Hand hose station
Connections not allowed on wet tree systems < 2 1/2" Hydraulically calc'd loop or grid - min 2" 1" - 20' 1 1/4" 20-80' > 80" min. 1 1/2"
54
water supply requirements for pipe schedule systems
Light hazard - min. psi 15 500-750 gpm 30-60mins | Ordinary hazard - min. psi 20. 850-1500 gpm 60-90mins
55
number of sprinklers for pipe scheduled systems
``` light + ordinary 1" - 2 1 1/4" - 3 1 1/2" - 5 2" - 10 ```
56
maximum spacing for hangers
1" - 12 ft 1 1/4" - 12 ft 1 1/2" to 6" - 15 ft
57
dry system pipe grade(main + branch lines)
Main: 1/4" per 10' Branch: 1/2" per 10'
58
offset ratios(run or offset and travel)
the ratio between the run or offset and the travel is equal to 1.414
59
solution of unequal spread offsets
relies on basic 45 degree triangle
60
basic principles of hydraulic calculations
sufficient water flow, and pressure, minimized for cost.
61
Basic procedure for hydraulic calculations
1. select hazard category 2. sprinkler spacing 3. piping arrangement 4. water required at each head 5. number and location of most demanding sprinklers 6. Work back from most remote sprinklers calculating necessary flows and pressures. 7. compare the demand calculated with water supply.
62
Up to 4" hangers ___ rod 5" to 10" hangers ___ rod 12"+ hangers ___ rod
up to 4" hangers 3/8" rod 5" to 10" hangers 1/2" rod 12"+ hangers 3/4" rod
63
Drive screws shall only be used in a horizontal position as in the side of the beam and only for __" pipe
2" pipe.
64
alarm switches
ps10 - flow alarm pressure switch | ps40 - low air supervisory
65
sprinkler spacing principles and protection areas
Standard pendent + upright ordinary hazard - 130 sq ft. 15' light hazard 225 sq ft 15 ft extra hazard 100-130 sq ft. 12-15 ft. depending on density/area
66
construction types
-
67
who is the AHJ
-
68
drain requirements
-
69
WMG requirements
Not more than 75' away. Not more than 20' above
70
Testing requirements
-
71
restricted orifices and ball drips
-
72
types of standpipe
-
73
class of standpipes
``` class 1- fire personnel only. 2 1/2" 100psi min. 175 max psi class 2 - building personnel. Hydraulically calculated only. Min 65 psi. 100gpm most remote hose connection. class 3 - 2 1/2" or 1 1/2". Min 100psi. Max 175psi 400psi max working pressure ```
74
Residential systems – purpose, design requirements, exclusions Difference between ABC and NFPA – bathrooms
-
75
hydrant flows
Hydrant flow tests annually. Pitot tube.
76
contract styles
-
77
divisions of blueprints
-
78
supervisory vs alarm
tampers=supervisory | vane flow switches = alarms

Sprinkler Systems Installer Period 2 (26 decks)

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