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Engineer Study Guide > FIRE PROTECTION/DETECTION > Flashcards

FIRE PROTECTION/DETECTION Flashcards

1
Q

Types of heat mech on sprinkler

A

Frangible link
Chemical pellet
Glass bulb

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2
Q

Ordinary sprinkler orifice

A

¹/₂”

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3
Q

Stamped on sprinkler

A

Temp, manufacture date and name, installation position

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4
Q

Sprinkler cabinet

A

6 heads and wrench

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5
Q

Control operating valves

A

Indicating and non-indicating.

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6
Q

Indicating valves

A

OS&Y
PIV
WPIV

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7
Q

135-170 degrees

A

Unpainted-ordinary

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8
Q

175-225 degrees

A

Intermediate- white

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9
Q

250-300 degrees

A

High- Blue

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10
Q

325-375

A

Extra High- red

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11
Q

400-475

A

Very extra high- green

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12
Q

500-575 degrees

A

Ultra high - orange

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13
Q

Alarm test valve

A

Connected to Supply side to simulate activation of syst.

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14
Q

Water flow alarm

A

Alarm check valve
Dry pipe valve
Deluge valve

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15
Q

Highest sprinkler in building

A

15 psi above residual

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16
Q

Tank bottom height

A

35 feet above highest sprinkler

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17
Q

Wet pipe system

A

Under pressure at all times

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18
Q

Chamber that prevents activation due to surge

A

Retard chamber

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19
Q

Retard chamber location

A

Between alarm check valve and alarm signaling equipment

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20
Q

Operation waterflow

A

Sprinkler opens–clapper open by pressure–Open auxiliary valve–enters auxiliary valve alarm and feels retard chamber–pressure switch–Electric alarm–water gong

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21
Q

System shutdown

A

Control valve and main drain

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22
Q

Clearance below sprinkler

A

18”

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23
Q

Dry pipe system

A

Large amount of air holding back a small amount of water

6:1

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24
Q

Dry pipe system pressure

A

15 to 50 psi

25
Pre-action system
Dry system with deluge valve | Prevent against water damage
26
Deluge system
Water flows through all heads
27
CO2 extinguish system
29% CO2 will dilute combustion to extinguishment
28
Is CO2 effective for class A fires
No
29
CO2 effective for
Flammable liquid tanks | Electrical hazard
30
Disadvantage of CO2 SYST
Re-ignition possible ¹/₁₀ effective as water Asphyxiation
31
CO2 pressure
300 psi-850 psi
32
Halon
Halogenated hydrocarbons
33
4 CO2 methods
Total flooding Local application Extended discharge Hand lines
34
Halogen series
Flourine Chlorine Bromine Iodine
35
Halon works due to.......
Breaking chain reactions
36
Most common halon
1301/1211
37
Toxicity of 1301
Less than CO2
38
1301 percentages
7% safe for people | 20% hazardous
39
Dry chemical types
Monoammonium phosphate Sodium Bicarbonate Potassium chloride
40
Four components of foam
Water, Air, foam concentrate, mechanical agitation
41
Class 1 standpipe
For FD 2 1/2" hose
42
Class 2 standpipe
Building occupants
43
Class 3 standpipe
FD and building occupants
44
Water supply for a class one standpipe
500 GPM 30 minutes
45
Water supply for a class 2 standpipe
100 GPM 30 minutes
46
Top residual for class one standpipe
65 PSI with water flowing 500 GPM
47
Standpipe height limitation
275 feet unless zoned
48
Hydro for standpipe systems
Five years 25 psi
49
NFPA 13E
Operation of standpipes
50
Class a fire extinguisher ratings
1A-40A rated on extinguishing potential
51
Class B extinguisher ratings
1B-640B square footage 8 inches deep
52
Professional square footage for class B extinguisher
2.5 times as much as civilian
53
Class C extinguisher ratings
No rating nonconductive only
54
Alarm system components
``` Control panel Initiating device Signal device Power source Auxiliary power source ```
55
Alarm system initiating devices
Pull box fire detector System activation
56
Types of fire detectors
Smoke, heat, ionizing gases, light
57
Distance between pull stations
200 feet
58
NFPA 72E
Detectors
59
NFPA 13
Installation of sprinklers

Engineer Study Guide (19 decks)

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