SCBA (BSM) Flashcards
(152 cards)
1
Q
SCBA
A
Self Contained Breathing Apparatus
2
Q
What model SCBA is used?
A
SCOTT Air-Pak X3 Snap-Change SCBA
3
Q
Purpose of SCBA
A
Respirator intended to provide respiratory protection to an individual when entering, working in, and exiting an objectionable, oxygen deficient, and/or unbreathable (toxic) atmosphere
4
Q
Major sub-assemblies
A
- Back frame and harness assembly
- Dual path pressure reducing assembly
- Snap-change air cylinder and valve assembly
- E-Z Flo+ facepiece mounted regulator
- AV3000 HT facepiece
- Pak-Alert SE7
5
Q
PRA
A
Pressure Reducing Assembly
6
Q
FMR
A
Facepiece Mounted Regulator
7
Q
Integrated PASS Device
A
Pak-Alert SE7
8
Q
The back frame consists of a ___
A
Kevlar cylinder retention band and latch assembly, connected to an aluminum frame
9
Q
___ are attached to the back frame
A
Snap-change pressure reducing assembly, integrated PASS device, and battery compartment
10
Q
The harness consists of ___
A
Adjustable shoulder straps, facepiece clip, regulator cup, drag loop, waist pad, and Class 1 rated waist strap
11
Q
The waist strap buckle can only be connected ___
A
One way
12
Q
Care must be used when slinging the Air-Pak to avoid ___
A
Twists in the strap
13
Q
Dual Emergency Breathing Support System is called ___
A
Buddy breathing
14
Q
The Dual Emergency Breathing Support System hose is mounted ___
A
In a pouch on the user’s right waist pad
15
Q
The standard SFD drop bag is located ___
A
On the user’s left side
16
Q
The Dual Path Pressure Reducing Assembly was developed ___
A
With NASA in 1976 with no reported complete failures
17
Q
The Dual Path PRA incorporates ___
A
Two inter-connected, redundant pressure reducers
18
Q
The PRA converts ___
A
Cylinder pressure in the primary reducer to 125 psig
19
Q
When the cylinder pressure drops to about ___, it triggers an automatic ___
A
- 33%
- Transfer to the second reducer, set at 150 psig
20
Q
The change in pressure activates the ___
A
Vibralert in the Facepiece Mounted Regulator
21
Q
If the primary airpath of the PRA becomes blocked or should fail closed, ___
A
The secondary air path will automatically begin supplying air to the Facepiece Mounted Regulator and the Vibralert alarm will be actuated to warn the user of the malfunction
22
Q
The PRA incorporates SCOTT’s ___ cylinder connection
A
Snap-Change
23
Q
The user must ensure ___ when attaching an air cylinder
A
Both snap-change locks click into place. No orange should show around the lock rings
24
Q
Do not attempt to release a cylinder when ___
A
The system is still pressurized
25
The cylinder valve includes a ___
Valve body, Snap-Change nipple, threaded fill connection with dust cap, tri-lobe ratcheting hand wheel, safety disc (burst disc), and pressure gauge
26
The gauge is calibrated in ___
100 psig increments
27
A gauge reading of 20 is read as ___
20 x 100 or 2000 psig
28
A ___ is used to open and close the cylinder valve
Hand wheel
29
Opening and closing the cylinder valve
Designed to freely open, but has a ratcheting style closing mechanism designed to limit the possibility of accidentally closing once open. To close the hand wheel needs to be pushed in as the user closes the valve
30
Standard cylinder used
Scott 5.5 Snap-Change by Luxfer
31
Cylinder specs
- 5500 psig
- 11% reduction in weight and 8% reduction in diameter
- Service life of 15 years
- Hydrostatic testing every 5 years
32
Two cylinders used
- Model 5.5 45 min
- Model 5.5 60 min
33
45 min cylinder capacity
66 cu/ft (1841 L)
34
45 min cylinder weight
13 lb 9 oz
35
60 min cylinder capacity
87 cu/fit (3464 L)
36
60 min cylinder weight
17 lb 6 oz
37
Cylinder pressure
5500 psig
38
Do not pick up or carry SCBA cylinders by the ___
Valve handle
39
Us the ___ to pick up, carry, and set down the cylinders
Body of the valve assembly
40
The threaded connection on the cylinder valve assembly is used for ___
Filling
41
The cylinder fill incorporates a ___
One-way valve that allows air to enter the cylinder, but not escape
42
Why to not open the hand wheel during filling
Will cause air to discharge through the Snap-Change nipple
43
The E-Z Flo+ Facepiece Mounted Regulator is a ___
Pressure-demand regulator, which keeps a positive pressure in the facepiece at all times
44
The E-Z Flo+ Facepiece Mounted Regulator features ___
1. One gloved hand operation
2. Redundant locking system
3. Easy inhalation/exhalation
4. Vibralert primary End of Service Time Indicator
5. Heads-Up DIsplay secondary End of Service Time Indicator
6. Chemical, biological, radiological, and nuclear approved
7. Easy cleaning
45
HUD
Heads up display
46
EOSTI
End of Service Time Indicator
47
The Facepiece mounted regulator separates the air ___
Being inhaled from the exhaled air
48
Upon inhalation, the air enters the facepiece through ___
9 small holes on top of the facepiece mounted regulator, called the spray bar
49
The air flows across the facepiece lens, ___
Cooling and removing any condensation that is built up
50
The air flows through the ___ and into the user's respiratory tract
Red inhalation valves in the nose cup
51
When the user exhales, the air is directed through the ___
Hole in the facepiece and corresponding exhalation port on the regulator
52
The exhaled air is vented through the ___ into the atmosphere
Regulator cover
53
The regulator does not need to be ___ between users
Cleaned or disinfected
54
Facepiece sizes
Small, medium, and large
55
The materials of the lens and bezel meet the requirements of ___
NFPA 1981, 2013 edition
56
The Kevlar harness of the facepiece has a reduced profile to eliminate ___
Bunching and discomfort under helmets
57
Mechanical voice amplification system that increases the clarity of communication between users
Voicemitters
58
Where is the voicemitter located?
One on each side of the facepiece
59
The voicemitter on the right side of the facepiece incorporates a ___
Mounting bracket for the SCOTT Epic 3 voice amplifier
60
Battery-powered voice amplification
Epic 3 voice amplifier
61
Most effective technique for communicating into a radio
Place the microphone directly over either of the voicemitters
62
The issued Scott Facepiece meets ___ for impact resistance and splash/droplet
ANSI 287 + D3
63
Integrated PASS device
Pak-Alert SE7
64
The PASS device is mounted ___
On the back frame
65
The PASS device incorporates ___
All of NFPA 1982, 2013 edition requirements, universal PASS sound, more consistent alarms sounds on the fire ground, and 33% End of Service Time Indicator (EOSTI)
66
Two components of the Pak-Alert
1. Remote Pressure Gauge assembly
2. Back frame Mounted Sensor module
67
The Remote Pressure Gauge is located on ___
The user's right side
68
The remote pressure gauge has ___
1. Two function buttons
2. LED backlit analog pressure gauge
3. LED indicator lights
4. Photo sensing diode for HUD's intensity
69
The sensor module assembly contains ___
1. Motion sensor
2. Two speakers
3. Battery power source for the PASS and HUD
4. Built in LEDs for alarms
5. 1/3-cylinder EOSTI
6. External HUD module
70
The Pak-Alert is powered by ___
6 AA batteries
71
How often are the batteries in the Pak-Alert changed?
Twice a year
72
Before changing the batteries, ensure that ___
The cylinder valve is off and the PASS alarm is completely inactive
73
What could happen if you change the batteries while the system is pressurized?
Damage may occur to electronic components
74
How to change the batteries
1. Use a Phillips screwdriver to remove the battery housing cover, and carefully remove and set aside
2. Slide out the batteries and replace with new ones
3. Ensure there is no debris or damage to the cover or gasket
4. Align the three grooves and hand-tighten
75
The Pak-Alert system is activated by ___
A pressure switch when the cylinder valve is opened
76
How will the Pak-Alert system indicate activation?
Chirp 3 times
77
Pak-Alert motion sensor characteristics
If no motion is detected in 20 seconds, a pre-alarm consisting of ascending/descending tones is heard from the sensor module on the back frame. The console assembly and back frame LEDs will flash red. Full alarm is reached 12 seconds after pre-alarm. The Pak-Alert will sound a continuous, 3-tone chirp. The console and back frame LEDs will continue to flash red
78
Remote Pressure Gauge button characteristics
1. Red and yellow
2. Big enough to activate with gloved hand, but slightly recessed to prevent accidental activation
79
Pressing the red button will ___
Place the PASS into full alarm mode
80
Manually placing the PASS into full alarms mode can be done ___
With or without air in the system
81
The yellow button is used to ___
Reset the PASS in pre-alarm by clicking the button once. If the PASS is in full alarm, press the yellow button twice to reset the system. Also used to shut off the integrated PASS after doffing and bleeding all air from the system. Two clicks will deactivate the integrated PASS
82
How will the PASS confirm deactivation?
2-tone beep from the sensor module and not flashing LEDs
83
If you attempt to deactivate the PASS with a pressurized system ___
You will hear single chirps every second for about 15 seconds. The chirps will stop, but the PASS is still activated and will continue to sense motion
84
The Pak-Alert distress alarm includes ___
On-board electronics which maintain a running log of event data including start-up, shut-down, and PASS activation
85
The remote pressure gauge assembly incorporates an analog display built at ___
An angle for easier viewing and backlit by an LED
86
Sensor module lights:
Bright light, then flashes green
Startup Pak-Alert (open cylinder)
87
Sensor module lights:
Flashes green
Normal operation
88
Sensor module lights:
Flashes orange alternately
Low air (1/3 cylinder)
89
Sensor module lights:
Flashes orange once every 2 seconds
Low battery while on
90
Sensor module lights:
Lights off
Shut down
91
Sensor module lights:
Bright light, then flashes green if good/flashes red if low
Press reset w/unit off (battery test)
92
Sensor module lights:
Flashes green, then flashes red
Press manual alarm with unit off
93
Sensor module lights:
Returns to flashing green
Press reset from manual alarm
94
Sensor module lights:
flashes red (alternately)
PASS pre-alarm
95
Sensor module lights:
Flashes red (simultaneously)
PASS full alarm
96
Sensor module lights:
Startup Pak-Alert (open cylinder)
Bright light, then flashes green
97
Sensor module lights:
Normal operation
Flashes green
98
Sensor module lights:
Low air (1/3 cylinder)
Flashes orange (alternately)
99
Sensor module lights:
Low battery while on
Flashes orange once every 2 seconds
100
Sensor module lights:
Shut down
Lights off
101
Sensor module lights:
Press reset w/unit off (battery test)
Bright light, then flashes green if good / flashes red if low
102
Sensor module lights:
Press manual alarm with unit off
Flashes green, then flashes red
103
Sensor module lights:
Press reset from manual alarm
Returns to flashing green
104
Sensor module lights:
PASS pre-alarm
Flashes red (alternately)
105
Sensor module lights:
PASS full alarm
Flashes red (simultaneously)
106
The orange light is ___
A combination of the red, green, and white lights that appears orange from a distance
107
Provides a visual monitor of the air supply in the cylinder and valve assembly
HUD
108
The HUD is fitted to the ___
Facepiece Mounted Regulator and appears across the bottom of the user's FOV through the lens
109
The HUD consists of ___
Four rectangular LEDs to represent the cylinder pressure at full, 3/4, 1/2, and 1/3. A fifth red round light indicates low battery
110
HUD initialization
When the air cylinder valve is open, the HUD will initialize and illuminate all five lights for twenty seconds
111
Operation of all 5 HUD lights must be verified ___
Every time the respirator is used and during the daily function check
112
After initialization, the rectangular indicator lights in the HUD will show ___
The level of the air supply in the cylinder
113
If the lights in the HUD do not operate properly ___
Remove from service, form 15, and send in for repair
114
When in pre-alarm the Pak-Alert will cause the HUD lights to ___
Flash in an alternating pattern
115
The color of the remote pressure gauge light will be the same as the ___
Current cylinder level light showing on the HUD
116
The HUD has an automatic ___
Brightness control
117
When the batteries require changing the, the round low battery indicator will ___
Stay illuminated for 20 seconds. After 20 seconds it will flash slowly (once per second)
118
When the low battery indicator activates, there is still sufficient power to ___
Operate the HUD for the duration of the cylinder
119
HUD light indicators:
(R)(Y)(G)(G) (r)
HUD in initialization mode
120
HUD light indicators:
(*)(*)(G)(G) (x)
Cylinder above 3/4 full
121
HUD light indicators:
(*)(*)(G)(*) (x)
Cylinder 1/2 to 3/4 full
122
HUD light indicators:
(*)(Y)(*)(*) (x)
Cylinder 1/3 to 1/2 full
123
HUD light indicators:
(R)(*)(*)(*) (x)
Cylinder less than 1/3 full
124
HUD light indicators:
(R)(*)(G)(*) / (*)(Y)(*)(G)
Pak-Alert in Pre-alarm (alternating pattern)
125
HUD light indicators:
HUD in initialization mode
(R)(Y)(G)(G) (r)
126
HUD light indicators:
Cylinder above 3/4 full
(*)(*)(G)(G) (x)
127
HUD light indicators:
Cylinder 1/2 to 3/4 full
(*)(*)(G)(*) (x)
128
HUD light indicators:
Cylinder 1/3 to 1/2 full
(*)(Y)(*)(*) (x)
129
HUD light indicators:
Cylinder less than 1/3 full
(R)(*)(*)(*) (x)
130
HUD light indicators:
Pak-Alert in pre-alarm
(R)(*)(G)(*) / (*)(Y)(*)(G) alternating
131
Dual emergency breathing accessory hose connections
1. LP side of the SCBA's PRA
2. Fitted with both male and female quick disconnect couplings
132
Where is the Dual Emergency Breathing Support System stored?
Belt mounted carrying pouch with a snap opening on the right side of the waist pad
133
The Emergency breathing support system is not a ___
Transfill system
134
Move air from one cylinder to another on the high-pressure side of the PRA
Transfill system
135
The emergency breathing support system allows users to share air on the ___
LP side of the PRA
136
When used for emergency escape, the emergency breathing support system must ___
Remain connected and used to supply breathing support to only one other user
137
Two ways to share air using the buddy breathing system
1. Emergency breathing support system connection to emergency breathing support connection
2. Emergency breathing support system connection to facepiece mounted regulator quick disconnect
138
Two SCBA users share the remaining air capacity of both cylinders as long as they stay connected
Buddy breathing hoses connected together
139
The air from only one SCBA cylinder is used to support two users
Buddy breathing hose connected to the receivers facepiece mounted regulator quick disconnect coupling
140
How to attach buddy breathing to the facepiece mounted regulator quick disconnect
Detach the facepiece mounted regulator by separating the quick disconnect coupling and attach the buddy breathing hose to the receiver's facepiece mounted regulator quick disconnect coupling
141
Point to follow when buddy breathing is being used
1. Declare a Mayday and plan escape route
2. Donor should have enough air to support two people to make it to an area of refuge
3. Donor's Vibralert should not be activated
4. Each users remote pressure gauge will continue to display their individual pressure
5. Maintain a secure face to facepiece seal
6. Donating user must ensure receiver's facepiece and regulator are properly donned, connected, and secure, prior to connecting buddy breathing
7. Exit the IDLH immediately
142
The male side of the emergency breathing support system manifold can release air at up to ___ when the ___
1. 150 psig
2. Check valve sleeve is pulled back
143
If damage to the buddy breathing hose occurs when connected and in use by two persons, the air loss will ___
Be from both cylinders
144
When using buddy breathing, one user always ___
Maintains control of the connected manifolds
145
Procedures to connect buddy breathing
1. Declare a mayday and plan escape route
2. Determine if there is sufficient air in the donating member's cylinder to support two users
3. Open the snaps on the pouch and extend the Emergency Breathing Support system hose
4. Remove the dust cap from the manifold
5. Determine most appropriate connection method
6. Test for positive connection by tugging on the couplings
7. When operating with mutual aid companies, they must have a compatible system
146
How to determine proper buddy breathing connection
1. If they connection does not match or is not accessible, they must hold their breath and separate the QD on the regulator hose and connect it to the female side of the manifold. Push until a sharp click is felt
2. If the hose on the person requiring support is accessible, the two manifolds may be joined
147
The buddy breathing system, facepiece mounted regulator, and remote pressure gauge are all located on the ___ of the PRA
Low pressure
148
When cylinder pressure drops to ___, the PRA switches air flow to a secondary pathway
~1833 psig (1/3 capacity)
149
Air exiting an alarming baddy breathing connection does so at a pressure ___
25 psig higher than air leaving an SCBA that is not in alarm
150
If cylinders are shared, the air will deplete ___
At the same rate if they are at the same pressure, but will consume from the alarming cylinder first because of the higher pressure
151
When an SCBA that is not in alarm is connected to one that is, both Vibralerts will sound due to ___
The higher pressure from the low SCBA overcoming the lower pressure from the full SCBA
152
When removing the buddy breathing, remove the facepiece and regulator from the user ___
Requiring support first. Separate the regulator or manifolds from each other, and repack
