CO2 Flashcards

(35 cards)

1
Q

Expansion rate

A

450:1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Air housing plenum tempature

A

225*F

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Oil storage/oil purification/emergency diesel tempature

A

160*F

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Characteristics

A
Colorless
Heavier than air/Displaces oxygen
Inert gas
Clean/No residue
Odorless
Seeks lowest level
Non corrosive
Non conductive
Non deteriorating
Non flammable
Non toxic
Non poisonous
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

CO2 Tank
High and Low Alarms
High and Low pressure switches

A

6 ton storage unit (12,000 lbs)
high pressure 350 psi, low pressure 275 psi
6-18 psi min,

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

CO2 system manufacture

A

Ansul preferred

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What type of CO2 system do we have

A

Low Pressure Carbon Dioxide Fire Suppression System

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

CO2 Pressure Vessel

A

4 inches of insulation
insulation is covered with Aluminum vapor barrier
vessel is provided in a saddle mount configuration

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What temp and psi is CO2 stored at

A

295 psi to 305 psi
the compressor turns on at 305, off at 295
0* F

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

CO2 tank dimensions

A
15'10" L
5'10" W
8'6" H
9000lb empty weight
1541 gallons
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Bleeder valve

A

opens at 330psi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Main safety relief valve

A

set to 350psi

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

The CO2 system consists of

A
low pressure storage unit
master valves
selector valves
manual & automatic controls
distribution nozzles
alarms
indicators
supervisory devices
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

master and selector valve

A

a ball or butterfly valve (depending on piping size)
pneumatic operator - 100 psi operating (150max/80min)
spring return to closed
electrically operated solenoid valve
30sec time delay open solenoid valve (3 rooms)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

purpose of the listed and approved releasing control panel

A

to provide automatic detection and control

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

lock out valve with supervisory switch

A

manual lock out valves
1/2 - 2” normal
3-8” has high visibility position monitor & handwheel (oil storage room and main tank)

17
Q

pressure relief valves

A

150 psi in actuation line
450 psi in piping where trapped CO2 could exist
350 psi on main tank

have filter to keep from getting clogged

18
Q

actuation line supervisory pressure switch

A

2 level, self restoring pressure switch
installed at most remote point in system
1st contact closes at 80 psi
2nd contact closes at 70psi

19
Q

if CO2 loses power does it still work?

A

yes 2 12V 50AH battery backup

20
Q

in closed state, the following zones dump co2

A

everywhere - discharge pressure switch, manual pull station, heat detectors, turn knobs
units also have phase differential relay while running

21
Q

CO2 density

A

1.5 times as dense as atmospheric air

22
Q

% CO2 concentration that will not support combustion

23
Q

1 lb CO2

A

100% concentration in 9 ft^3

50% concentration in 20 ft^3

24
Q

pressure required to lift relief dock

25
lbs of CO2 for a unit dump
3492lbs total 2192lbs initial - 150 sec - 880lbs/min 1300lbs extended over 20 min
26
initial and extended release valves open at
same time
27
nozzles per unit
8 initial | 4 extended
28
volume of air in thrust housing
22,000 ft^3
29
initial discharge design description
the generator system is designed to achieve 50% concentration within 7 mins at a flow rate to achieve at least 30% concentration within 2 mins required by NFPA standard 12 for deep-seated hazards
30
oil storage/oil purification/emergency generator only have
initial release, no extended - 1 minute dump 30 second time delay louvers and doors close after 30 seconds
31
oil storage size/detector/nozzles
26,000 ft^3 1820lbs 8 @ 160*F 26 nozzles
32
oil purification size/detector/nozzles
6700 ft^3 469lbs 4 @ 160*F 9 nozzles
33
emergency diesel size/detector/nozzles
12,050ft^3 845lbs 3 @ 160*F 13 nozzles
34
oil storage/oil purification/emergency generator are considered
``` surface fire class B hazard designed to achieve 34% concentration within 1 min ```
35
loss factors
units use 1.2 | 3 rooms use 1.4