Chemical Based Specialty Systems Flashcards
1
Q
What is Carbon dioxide
A
-Inert
-non corrosive
-nontoxic
-electrically non-conductive
-leaves no residue
2
Q
CO2 is how heavy with relation to air
A
1.5x heavier then air
3
Q
How does CO2 extinguish fires
A
Reducing oxygen in the air
4
Q
CO2 removes oxygen to what level
A
To 15%
(21% is normal level)
5
Q
What must be posted outside where CO2 discharge presents risk
A
Warning signs
6
Q
Safety actions that should be taken with CO2 systems are
A
-alarms that activate upon system activation
-adding odour to CO2
7
Q
What is especially important with CO2 systems
A
Maintain a minimum clearance from live electrical part and system piping and nozzles
8
Q
In areas with an explosive atmosphere with a CO2 system what must be done
A
Properly grounded metal nozzles
9
Q
Where are CO2 systems used
A
Dip tanks
Drainboards
Rolling mills
Oil filled transformers
10
Q
Where are CO2 systems not suitable for
A
Deep seated or smouldering fires
11
Q
In high pressure CO2 systems, the CO2 is stored at what temp
A
Cylinders at room temp
12
Q
As CO2 is discharged from the nozzles, it converts to a gas and expands at a ratio of
A
450:1
13
Q
CO2 converts to dry ice at what temp
A
-110F
14
Q
Hangers on CO2 systems are different how
A
More substantial and closely spaced compared to average sprinkler system
15
Q
Pipe permitted in high pressure CO2 systems
A
ASTM A-53 - seamless or electric welded pipe
ASTM A-106
16
Q
Pipe permitted in Low pressure CO2 systems
A
A-53 butt welded pipe
17
Q
High pressure CO2 systems with 3/4” and smaller can be what pipe
A
Sch 40
18
Q
High pressure CO2 systems with 1-4” pipe must be what pipe schedule
A
Sch 80
19
Q
All pipe in low pressure CO2 systems must be at least what schedule
A
Sch 40
20
Q
What fitting cannot be used with CO2 systems
A
Cast iron or Class 150 fittings
21
Q
In high pressure CO2 systems, what fittings shall be used for pipe sizes up to 2”
A
-Class 300 malleable
-Ductile Iron fittings
22
Q
What fittings shall be used on all pipe sizes larger then 2” on high pressure CO2 systems
A
Forged steel fittings
23
Q
Flanged joints upstream of any stop valve shall be what for high pressure CO2 systems
A
Class 600
24
Q
In high pressure CO2 systems, Downstream of any stop valves, or in systems with no stop valves, flanged joints may be
A
Class 300
25
In low pressure CO2 systems, what fittings may be used with pipe sizes up to 3”
Class 300 malleable
Ductile iron fittings
26
In low pressure CO2 systems, what fittings shall be used on all pipe larger then 3”
1000lb ductile iron or forged steel fittings
27
Flanged joints in low pressure CO2 systems shall be
Class 300
28
What bushings shall not be used with CO2 systems
Flush bushings
29
What bushings can be used in CO2 systems
Hex bushings,
3000lb forged steel bushing shall be provided with more then 1 pipe size reduction
30
Where brazed joints are used in CO2 systems the brazing alloy shall have a melting point of
1000F or higher
31
What fittings may be used on CO2 systems if listed for it
Mechanical grooved couplings and fittings
32
After assembly of CO2 systems, what must be done prior to nozzles being installed
System must be blown out
33
What does a dirt trap consist of with CO2 systems
Tee or capped nipple at least 2” long at the end of the each pipe run
34
Pressure in storage cylinders varies with
Tempature
35
At 70F, the pressure inside high pressure CO2 storage cylinders would be
850psi
36
With CO2 systems, the storage temperature for local application systems shall be
No more then 120F
No less then 32F
37
Total Flooding CO2 systems shall be stored at temperatures not to exceed ____ and go below ____
No more then 130F
No less then 0F
38
What is provided on each carbon dioxide system for safety
A disk that will rupture at a pressure below the cylinder test pressure
39
The cylinders in a high pressure system are manifolded into a common header with
Flexible discharge loops
40
What cylinders are activated by control head in CO2 systems
Pilot cylinders
41
In CO2 systems, cylinders that are activated by CO2 discharge into the header from the pilot cylinders are called
Slave Cylinders
42
CO2 systems, if the supply consists of three cylinders or more, there shall be what
One pilot cylinder more than the minimum required to act the system
43
2 main categories of high pressure CO2 systems are
Local Application
Total Flooding
44
Low pressure CO2 systems storage containers have a working pressure of at least
325psi
45
Low pressure CO2 systems storage containers are maintained at a temperature of
0F
46
The use of low storage pressure makes it economical to store CO2 in quantities above
500lbs
(No max size limitation, multiple hazards are usually protected by one storage unit)
47
Relief valves on low pressure storage units are set to bleed off if the pressure exceeds
341psi
48
Pop valves on low pressure storage units are set to operate at
357psi
(For a rapid release)
49
Master and master selector valves are located
At the storage unit and are under constant pressure
50
What do master and master selector valves do
Control the flow of carbon dioxide to one or more selector valves
51
Selector valves are located
Near the hazard are
52
Selector valves control
The actual discharge of CO2 into the hazard
53
The discharge control valve on a low pressure CO2 system is commonly know as
**Piston Operated Globe Valve**
(spring holds the valve disc in the normally closed position)
54
Discharge control valves are regulated by
Pilot valves located in cabinets
55
Pilot valves in cabinets are fed with what size pilot line
1/2”
56
Pilot Valves are actuated in 3 ways
-Automatically electrically (detection devices)
-manually electrically (push button stations)
-manually mechanically (lever on front of pilot valve cabinet)
57
Pilot valves controlling master valves, what happens in power failure (Normally Energized)
Pilot valves will open to allow CO2 to pass through the master valves to the selector valves
58
Pilot valves controlling selector valves and master selector valves will do what In a power failure
(Normally de-energized)
Will not allow CO2 to pass through the discharge control valves into the protected area
59
What is the NFPA for carbon dioxide systems?
NFPA 12
60
A total flooding carbon dioxide system shall consist of
A fixed supply of CO2 permanently connected to a fixed piping
61
Total flooding CO2 systems shall be used where
There is a permanent enclosure around the hazard
62
New total flooding carbon dioxide systems shall not be installed where
Normally occupied enclosures
63
When can new total flooding systems (CO2) be installed in normal occupied and enclosures
-Concentrations do not fall below LOAEL
-Enclosures involving electrical equipment >400V
-where other gaseous agents are not available for the specific hazard
-Marine cargo holds and engine rooms
64
Existing total flood CO2 systems shall be permitted in occupied and enclosures equipped with
-System lockout valves
-pneumatic pre-discharge alarms
-pneumatic time delays
65
What shall be conducted to ensure that carbon dioxide effectively covers the hazards for full periods of time?
Full discharge of the entire design quantity of carbon dioxide
66
Design concentration in CO2 systems shall be maintained a minimum of
20 minutes
67
Rate of Rise application (CO2) shall based on
The quantity of CO2 and the maximum time to achieve concentration
68
For surface fires with CO2 systems the concentration shall
Be achieved in
1 min
69
For deep seated fires with CO2 the concentration shall be achieved in
7min
70
CO2 systems, What application method shall be used for the extinguishment of surface fires where the hazard is not enclosed
Local
71
The quantity of CO2 required shall be enough to
Blanket the area and the discharge must be maintained to ensure complete extinguish
72
The minimum discharge time from any nozzle in CO2 systems shall be (local application)
30 seconds
73
Minimum discharge time shall be increased to _____ minutes, for any hazard that would require a longer cooling period/complete extinguishment
3 minutes
74
The total discharge rate in CO2 systems shall be equal to
**1lb/min per cubic ft**
75
CO2 devices shall be designed to normally function between what temperature
-20F to 150F
76
Consideration shall be given to what with CO2 systems
-CO2 can drift and settle outside protected space/migrate or collect in areas
77
What alarms shall be provided with CO2 systems
Audible and Visible (located outside each entrance)
78
What specific alarms shall be located within the hazard area
Pre-Discharge
79
Time delays with CO2 systems must be sufficient enough to
Allow personnel to evacuate from the most remote exits
80
Manual Controls with CO2 systems shall NOT require what
Pull force of more than 40Lbs
Nor a movement of more then 14”
81
At least ____ manual control for activation shall be provided for CO2 systems
1
82
How far is the manual release above finished floor
4ft
83
What switches shall not be used with CO2 systems
Abort Switches
84
All carbon dioxide systems shall be inspected at least
Monthly to access the systems operational condition
85
What is included in an annual inspection of a CO2 system
System operation
Hazard
Audible and Visible alarms
Signs and detection operation
86
Discharge test of CO2 systems are only required when
Maintenance indicates the necessity
87
Low pressure CO2 systems use CO2 stored in a pressure tank maintained at what psi
**300psi** through refrigeration
88
What pipe may be used on low pressure CO2 systems
- A53 furnace butt welded pipe
- at least Sch 40 pipe
89
What fittings may be used on a low pressure CO2 system up to 3”
Class 300 malleable
Ductile iron
90
What fittings may be used on low pressure CO2 systems larger then 3”
1000lb ductile iron
Forged steel fittings
91
Flanged joints in low pressure CO2 systems shall be
Class 300
92
Valves used in low pressure CO2 systems, shall withstand hydrostatic test pressure of
1800psi without distortion
93
Pressure vessels in low pressure CO2 systems are designed to a working pressure of at least
325psi
94
Vessels in low pressure CO2 systems are maintained at a temp of approximately
0F
95
In a low pressure CO2 system, with the vessel at 0F the pressure is approximately
300psi
96
Low pressure CO2 systems allows quantities above ____ to be stored
500lbs (no max size limit)
97
With vessel storage in low pressure CO2 systems, if the temp drops to approx. -10F, the tank pressure would read
Below 250psi, heating must then be provided
98
Containers on low pressure CO2 Systems are provided with 2 types of relief valves which are
Diaphragm
Pop Valves
99
At least ____ the liquid level should be observed in a low Pressure CO2 system
Weekly
100
Where is the master valve located with low pressure CO2 Systems
At the storage unit and under constant pressure
101
Where is the selector valve located in Low pressure CO2 systems
Located near the hazard area, downstream of master valve
102
What does the selector valve do in Low pressure CO2 systems
Controls the actual discharge of CO2 into the hazard
(remains closed unless actuated by its control device)
103
Master selector valve is located where low pressure co2 systems
At the storage unit and is under constant pressure
104
What does the master selector valve do in low pressure CO2 systems
Used to control flow of CO2 and actual discharge into the hazard
105
Pilot valves in Low pressure CO2 systems are actuated in 3 ways which are
Automatically - Electrically
Manually - Electrically
Manually - Mechanically
106
How does a automatic electric pilot valve work (low pressure CO2 systems)
-Actuated by fire detection
-will discharge for a pre determined length of time then return to normally closed
107
How does a manually electric pilot valve work (low pressure CO2 systems)
-actuated by push button stations
-will discharge for pre determined length of time then return to normally closed
108
How does a manually mechanically pilot valve work (low pressure CO2 systems)
-Actuated by a lever
-will discharge and remain open until manually returned to closed position
109
Carbon dioxide systems are extinguish fires by
Reducing level of oxygen from 21% to 15%
(A point at which combustion cannot exist)
110
Some hazards CO2 can protect are
Flammable liquids
Electrical Hazards
Ordinary Combustibles
Hazardous Solids
111
How are High pressure CO2 cylinders stored
Cylinders at room temp
112
In a high pressure CO2 systems, the CO2 is distributed to the nozzle as a
Liquid
113
High pressure CO2 systems, each tank has a
Dip tube
114
As CO2 is discharged in a high pressure system, its converts to a gas at a ratio of
450:1
115
Hangers in high pressure CO2 systems are
More substantial and closely spaced
116
Valves under constant pressure in high pressure CO2 systems shall have a minimum burst pressure of
6000psi
117
Valves not under pressure in high pressure CO2 systems shall have a minimum burst pressure of
5000psi
118
3/4” and smaller pipe in high pressure CO2 systems may be
Sch 40
119
1-4” pipe in high pressure CO2 systems shall be
Sch 80
120
2” and smaller Fittings in high pressure CO2 systems shall be
Class 300 malleable
Ductile iron
121
Any Fittings larger then 2” shall be what in high pressure CO2 systems
Forged steel fittings
122
Any flanges upstream of a stop valve in a high pressure CO2 system shall be
Class 600
123
Any flanges downstream of a stop valve in a high pressure CO2 system shall be
Class 300
124
What bushings cannot be used with high pressure CO2 systems
Flush bushings
125
Where hex bushings are used for one pipe size reduction on high pressure CO2 systems, it shall be
Class 300
126
Copper and brass tubing shall use what fittings with high pressure CO2
Flared
Compression
Brazed
127
Brazing alloy shall have a melting point of _____ with high pressure CO2 systems
1000F or higher
128
When can grooved couplings and fittings be used with high pressure CO2 systems
Only if they are specifically listed for use
129
What does the master valve do in low pressure CO2 systems
Controls the flow of CO2 to one or more selector valves
130
What shall the nozzles be marked to show on CO2 systems
The equivalent single orifice diameter
1= 1/32 .5= 1/64
2 = 2/32 3.5= 7/64
3 = 3/32
4= 4/32
131
In a CO2 system pipe shall be
Reamed and clean before assembly
132
CO2 systems, a dirt trap consisting of _______ and should be installed ________
Consisting of a Tee and capped nipple at least 2” long
Should be installed at the end of each pipe run
133
CO2 is stored under its own
Vapour pressure for discharge
134
With CO2 systems Local application methods shall be within what temp
32F to 130F
135
With CO2 systems Total Flooding application methods shall not exceed what temp
0F to 130F
136
What may be used to keep system temperature within specified ranges
External heating or cooling
137
What is provided for safety and will rupture at a pressure below cylinder test pressure
Rupture disc
138
Cylinders in a high pressure CO2 system are manifolded into
A common header with flexible discharge loops
139
Control heads operate what cylinders
Pilot cylinders
140
The cylinders that are activated after the pilot cylinders are called
Slave cylinders
141
At least ______ cylinders shall be weighed and the date of the last hydrostatic test noted (CO2)
Semi Annually
142
Carbon dioxide will suppress a fire without leaving any
Residue
143
Carbon dioxide will suppress what class of fire
Class A, B and C
144
CO2 is present in the atmosphere at an average of about
0.03%
145
Carbon dioxide is discharged through the pipe network as a
Liquid
146
CO2 has a density of about ____ compared to air
50% greater
147
CO2 can exist as
Liquid, solid, gas
148
Below ____ CO2 cannot exist as a liquid
60psi
149
Triple point of CO2 is
60psi
This is the point at which it can exist as a liquid, solid, or gas
150
What is a hand hose line system with CO2
Hose and nozzle assembly are connected by fixed piping, connected to supply
151
High pressure CO2 systems are typically used in
Smaller hazard areas
-printing presses
-vaults
-spray booths
-ovens
-process equipment
-hoods and ducts
152
The main cylinder with control actuator on CO2 systems is called the
Pilot cylinder
153
Low pressure CO2 systems are generally used in
Larger or multiple hazard areas
-open pits
-coating machines
-exhaust and fume handling systems
-generators
-rolling mills
-inerting applications
154
NFPA for clean agent systems
NFPA 2001
155
Types of agents with clean agent system
Halocarbon and Inhert gas
156
What is a halo carbon agent
Agent that contains **Fluorine, Chlorine, Bromine, or Iodine** as one of its primary components
157
What is Inhert Gas agent
**Helium, Neon, Argon, or Nitrogen** as primary component
158
Types of fires clean agent systems can be used on
Class A, B and C
159
Clean agent may be discharge using 2 methods which are
Total Flooding
Local application
160
CO2 systems may be discharged using 3 systems
Total Flooding
Local application
Hand hose systems
161
Pipe used in clean agent systems is based on
**Pressure and temperature**
(Shall be able to support pressures)
162
When shall pipe be cleaned internally with clean agent system
After preparation and before assembly
(must be clean before discharge devices are put on)
163
How is a clean agent system cleaned internally
Swabbed with non flammable cleaner
164
After the cleaning internally of a clean agent system the pipe shall be free of
Particle matter and oil residue
165
Acceptable pipe joints in clean agent systems
Threaded
Welded
Brazed
Flared
Flanged
166
Fittings in clean agent system shall NOT be
-Cast Iron
-Class 150
167
Brazing alloys shall have a melting point above _____ in clean agent systems
1000F
168
In a clean agent system, tape or thread lubricant shall be applied to
Male threads only
169
Discharge nozzles in clean agent system shall be marked to identify
-manufacture
-type and size of orifice
170
What detection devices shall be used with clean agent systems
Automatic
171
Device operating temperature range with clean agent system
-20F to 130F
172
What is required on clean agent systems that can be activated manually
Discharge pressure switch
173
Manual controls on a clean agent system require
- A pull force of **40lbs**
- **14”** of moment for operation
- Located not more then **4’ AFF**
174
What switch can be used to prevent unwanted discharge in clean agent system
Supervised disconnect switch
175
What percent of the design concentration must be maintained with clean agent systems
85%
176
What is the duration that 85% of the highest level of concentration must be maintained in clean agent systems
10 minutes
177
Max time to extinguish a fire with a halocarbon agent is
10 seconds
178
Max time to extinguish a fire with Inhert gas is
120 seconds
179
Clean Agent quantity and pressure shall be checked
Semi Annually
180
Cylinders in clean agent systems more then ____ years old, require to be refilled, shall be tested first
5 years old
181
The hazard being protected with clean agent systems require inspection
Annually
182
Clean agent System pressure test shall be tested using
Nitrogen or another dry gas
183
Test pressure and duration for clean agent system and allowable loss
40psi for 10 minutes
Cannot lose more than 20%
184
Flow test shall be done with clean agent systems to ensure
There are no obstructions in pipe from cylinders to nozzles
185
What must be done to enclosure of total flooding clean agent systems
Inspected and Tested to ensure that air cannot leak out
186
3 kinds of clean agent systems are
Sapphire
Inergen
FM 200
187
Clean agent in a sapphire system is stored in what form
A liquid
188
What fluid does a sapphire system use
3M Novac 1230 fire fighting fluid
(Halo carbon agent)
189
Cylinders in a sapphire system have what in them
Nitrogen
190
What pressure are nitrogen filled cylinders in sapphire system
360psi
191
Sapphire extinguishes fire by
Heat Absorption
192
Ingergen systems the clean agent is stored in what form
Gas
193
What does the gas consist of in ingergen systems
**52% Nitrogen
40% Argon
8% CO2**
(Inhert Gas agent)
194
Ingergen systems provide there own _____ for expulsion
Vapour pressure
195
Ingergen system extinguishes fire by removing oxygen below
15%
196
FM200 systems the agent is stored in what form
Liquid
197
What does the clean agent consist of in an FM 200 system
Carbon
Fluorine
Hydrogen
198
How does an FM 200 system extinguish a fire
Removes heat
199
In an FM 200 system the cylinders are charged with what and at what pressure
Nitrogen and at 360psi
200
What has been a long time substitute of Halon 1301
Sapphire systems
201
What does ODP, GWP, and ATL mean
ODP= ozone depletion potential
GWP= global warming potential
ATL= atmospheric lifetime
202
Sapphire systems ODP, GWP, and ATL
ODP= 0
GWP= 1
ATL= 5 days
203
Ingergen systems ODP, GWP, and ATL
ODP= 0
GWP= 0
ATL= 0
The components are found in our atmosphere
204
FM 200 systems ODP, GWP, and ATL
ODP= 0
GWP= 3500
ATL= 34 years
205
Halon 1301 ODP, GWP, and ATL
ODP = 12
GWP = 6900
ATL = 65 years
206
What is the Montreal protocol
International agreement signed by Canada + 24 other countries to restrict the production of chemicals depleting the ozone layer
207
Halon was first used during
WW2
208
Characteristics of clean Agents
-Volatile or gaseous fire extinguisher
-electrically non conductive
-leaves no residue
209
For an agent to classify as “clean” it must have
No know effect in the ozone layer or humans
210
Halocarbons are stored as a ____ and delivered as a ____
Stored as a liquid
Delivered as a gas
211
Halocarbons require what to discharge
Expelling agents
Usually nitrogen or CO2
212
Halocarbon extinguishes a fire by
Heat Absorption
213
Inhert gas extinguishes a fire by
Lowering oxygen to 15%
214
Inhert gasses have enough ____ to expel themselves
Sufficient vapour
215
Inhert gas are stored as a ______ and delivered as a ______
Gas
216
What Clean agent is more environmentally friendly
Inhert Gas
217
Most clean agent systems are used as what kind of system and why
-Total Flooding
(Because local can only be used on surface fires that are not enclosed)
218
Dry chem is a powder composed of
Very small particles with added particulate material
219
Dry chem is supplemented with special treatments to provide resistance to
Packing
Moisture absorption (caking)
220
How does dry chem extinguish a fire
Removes oxygen and blocks from fuel vapours from releasing
221
Dry chem is best used on
Serious hazard with a danger of quick spreading
222
2 basic system types of dry chem are
Local & Total Flooding
223
In a total flooding dry chem system, the design concentration shall be obtained within
30 seconds
224
2 types of local application for dry chem are
Area method
Volume method
225
Area method with dry chem is applicable to
Superficial fires
(Amount of agent depends on hazard)
226
Volume method with dry chem is applicable to
Cubical fire
(Amount of agent depends upon the volume of object in danger)
227
Hazard area in dry chem shall include
All areas that are or may become coated by combustible or flammable liquids
228
Detection devices for dry chem
Heat responsive elements or Linear heat sensing cable
229
Once the electric actuator is operated on a dry chem, what is released
Nitrogen
(to activate the pneumatic actuators on the dry chem storage tanks)
230
What does the rupture disc do on a dry chem storage tank
Permit the build up of proper operating pressure
231
If dry chem is allowed to enter without sufficient pressure what could happen
Buildup on 90s and Tees
Restriction of flow/blocking
232
Pipe requirements for dry chem up to 6” pipe
-Galvanized Sch 40
-Black steel can be used in non corrosive environments
233
Brass and copper may be used in dry chem systems as long as
It’s thickness compares to Sch 40 pipe
234
Flexible piping may be used in dry chem systems as long as
It’s listed for such
235
Fittings in dry chem systems shall be
Galvanized malleable iron
Stainless steel copper or brass
236
What fittings can NOT be used in dry chem systems
Standard cast iron
237
After assembly of dry chem system, pipe must be
Blown out with dry gas before nozzles are installed
238
Dry chem is applied to a fire by means of
Extinguishers
Hand hose line systems
Fixed piping system
239
What was the first “standard” fire extinguishing dry chem
Sodium Bicarbonate (baking soda)
240
When did multiprupose dry chem begin to be manufactured
1960
241
5 basic varieties of dry chem and what fires they can be used on
- Sodium Bicarbonate (B&C)
- Potassium Bicarbonate (B&C)
- Potassium Chloride (B&C)
- Urea-Potassium Bicarbonate (B&C)
- Mono-ammonium Phosphate
(A,B & C)
242
The term “regular dry chem” or “standard dry chem” refer to
Dry chems that can be used on Class B & C fires
243
“Multipurpose dry chem” refers to dry chem that can be used on
Class A, B & C fires
244
What is the most effective dry chem
Urea-Potassium Bicarbonate
245
Potassium Bicarbonate is more effective then
Sodium Bicarbonate
246
Mono ammonium phosphate base was found equal or better then
Sodium bicarbonate
247
What is the primary principle of extinguishment with dry chem
Breaks chemical chain reaction
248
Dry chem is available In bags or plastic lined containers usually weighing
10lbs or more
249
Dry chem should not be stored in temperatures of
Over 140F
(Additives may melt causing caking)
250
If dry chem loses its free flowing condition it should be
Thrown out
251
Dry chem is primarily used to extinguish fires of
**Class B & C**
Flammable liquids (dip tanks)
-Effective on transformers and oil circuit breakers, surface fires with ordinary combustibles
252
Dry chem will NOT permanently extinguish a fire if what is still present
Ignition source
253
Dry chem should not be used where
Delicate electrical contacts are located
254
Dry chem will not extinguish fires in materials that supply there own
Oxygen
255
Gas for dry chem stored separately in small containers are sometimes referred to as
Cartridges
This is a “Stored Gas system”
256
Gas stored in the same container as dry chem is called
“Stored pressure system”
257
Engineered types of dry chem systems are designed to
-Particular purpose or hazard
-Require individual Calc. And design
258
Pre-Engineered types of dry chem systems are designed to
-Components are determined by fire tests for sizes & types of hazard. “Package systems”
(Kitchen hoods)
259
Engineered dry chem is designed by
Specialist
260
Pre Engineered dry chem is designed by
Manufacture
261
Hybrid systems are a combination of
Inhert gas and water mist systems
262
Hybrid systems provide characteristics that are ideal for
Dispersion
Extinguishment
Cooling of fires
263
Water supply in hybrid system must be
Potable or same quality
264
Hybrid media system 2 key components
Discharge of the **water mist and Inhert gas** from a common device
265
Hybrid media system reduces oxygen level below
16%
266
Hybrid system used on what class fires
Class A, B, and C
267
Vortex system was the first
Hybrid system
268
Vortex system use ____ as the Inhert gas
Nitrogen
269
Discharge nozzles are called what in vortex systems
Emitters
270
Piping in vortex system from tank to regulator in panel enclosure must be
-Sch 80 or 160
-Black, seamless, welded or threaded
271
Beyond the regulator in a vortex system the pipe can be
Sch 10
272
All fittings in a vortex system before the regulator shall be
Forged steel 3000 pound
273
Beyond regulator in a vortex system the fittings can be
Standard fittings
274
tank in a vortex system size
11.5”x69”
475 cubic ft
275
Weight of tank in vortex system
325lbs
276
In a vortex system, water enters the path of nitrogen at
Super sonic speed
277
Vortex emitter is connected with what size pipe
1”
278
Nitrogen within cylinders of vortex system is released by
Electric actuation from detector circuit
279
Low pressure switch in vortex system will send a trouble signal when the pressure is below
2300psi
280
Device that opens the needle valve on vortex system
PLC motor drive
281
Halon 1301 was banned in
1987 by Montreal protocol
282
FM200 became one of the replacements for
Halon 1301
283
FM200 was patented by
Great Lakes chemical Corp in 1993
284
FM-200 extinguishes fires by
-Cooling the flame
-Interrupting the chemical process
285
FM200 is used in applications that include
-Telecommunications/computer operations
-Library’s/museums
286
Benefits of FM200
-safe for humans
-leaves no harmful or messy residue
287
FM200 extinguishes a fire in ____
Seconds
288
FM200 is a compound that consist of
Carbon
Fluorine
Hydrogen
289
If FM200 is exposed to temperatures greater then _____ toxic products of decomposition are formed
1300F
(Hydrogen fluoride)
290
FM200 is stored as a ____
Liquid
291
FM200 is stored as a liquid in shell containers at a pressure of
360PSIG
(With nitrogen)
292
Accepted minimum concentration levels of FM200 for factory mutual and UL
Factory Mutual - 7%
UL - 6.25%
293
UL and FM require multiple tiers of nozzles for heights above
UL- 10ft
FM - 12ft
294
All special application systems require
A manual actuator
295
Nozzles in FM200 system are designed to properly discharge/distribute the gas in how long
10 seconds
296
Typical radial nozzle in FM200 range in sizes of
3/8” to 2”
297
What is a reason nozzles cannot be changed
Outlet holes are drilled to specific size
298
Tees in FM200 systems are to be installed
Horizontal plane
(Minimizes liquid Vapor separation)
299
Nozzles are drilled in what size increments
Thousands of an inch
300
Testing procedure for FM200 system
Pneumatically for 10 min @ 150psi
Pressure drop shall not exceed 20% of test pressure
301
No pressure loss can be present on the _____ for FM200 systems
Pilot manifold piping
(Bubble tight)
302
Concentration time starts when
When bottle starts discharging
303
CO2 bottles must be replaced or refilled when
10% weight loss
304
Type of application CO2 systems work best
Class C Fires
305
What’s the purpose of the dip tube in a high pressure CO2 system
Draws liquid CO2 from cylinder
306
Victaulic colour coding for sprinkler piping
Purple/Violet
307
Victualic colour coding for CO2
Silver
308
Purpose of flexible discharge loops on high pressure CO2 system
Easily check weight
309
What does LOAEL mean
Lowest Observed Effect Level
