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Recruit School > SCBA (BSM) > Flashcards

SCBA (BSM) Flashcards

1
Q

SCBA

A

Self Contained Breathing Apparatus

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2
Q

What model SCBA is used?

A

SCOTT Air-Pak X3 Snap-Change SCBA

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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

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4
Q

Major sub-assemblies

A
  1. Back frame and harness assembly
  2. Dual path pressure reducing assembly
  3. Snap-change air cylinder and valve assembly
  4. E-Z Flo+ facepiece mounted regulator
  5. AV3000 HT facepiece
  6. Pak-Alert SE7
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5
Q

PRA

A

Pressure Reducing Assembly

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6
Q

FMR

A

Facepiece Mounted Regulator

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7
Q

Integrated PASS Device

A

Pak-Alert SE7

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8
Q

The back frame consists of a ___

A

Kevlar cylinder retention band and latch assembly, connected to an aluminum frame

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9
Q

___ are attached to the back frame

A

Snap-change pressure reducing assembly, integrated PASS device, and battery compartment

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10
Q

The harness consists of ___

A

Adjustable shoulder straps, facepiece clip, regulator cup, drag loop, waist pad, and Class 1 rated waist strap

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11
Q

The waist strap buckle can only be connected ___

A

One way

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12
Q

Care must be used when slinging the Air-Pak to avoid ___

A

Twists in the strap

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13
Q

Dual Emergency Breathing Support System is called ___

A

Buddy breathing

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14
Q

The Dual Emergency Breathing Support System hose is mounted ___

A

In a pouch on the user’s right waist pad

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15
Q

The standard SFD drop bag is located ___

A

On the user’s left side

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16
Q

The Dual Path Pressure Reducing Assembly was developed ___

A

With NASA in 1976 with no reported complete failures

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17
Q

The Dual Path PRA incorporates ___

A

Two inter-connected, redundant pressure reducers

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18
Q

The PRA converts ___

A

Cylinder pressure in the primary reducer to 125 psig

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19
Q

When the cylinder pressure drops to about ___, it triggers an automatic ___

A
  1. 33%
  2. Transfer to the second reducer, set at 150 psig
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20
Q

The change in pressure activates the ___

A

Vibralert in the Facepiece Mounted Regulator

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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

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22
Q

The PRA incorporates SCOTT’s ___ cylinder connection

A

Snap-Change

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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

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24
Q

Do not attempt to release a cylinder when ___

A

The system is still pressurized

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25
Q

The cylinder valve includes a ___

A

Valve body, Snap-Change nipple, threaded fill connection with dust cap, tri-lobe ratcheting hand wheel, safety disc (burst disc), and pressure gauge

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26
Q

The gauge is calibrated in ___

A

100 psig increments

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27
Q

A gauge reading of 20 is read as ___

A

20 x 100 or 2000 psig

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28
Q

A ___ is used to open and close the cylinder valve

A

Hand wheel

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29
Q

Opening and closing the cylinder valve

A

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

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30
Q

Standard cylinder used

A

Scott 5.5 Snap-Change by Luxfer

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31
Q

Cylinder specs

A
  • 5500 psig
  • 11% reduction in weight and 8% reduction in diameter
  • Service life of 15 years
  • Hydrostatic testing every 5 years
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32
Q

Two cylinders used

A
  • Model 5.5 45 min
  • Model 5.5 60 min
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33
Q

45 min cylinder capacity

A

66 cu/ft (1841 L)

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34
Q

45 min cylinder weight

A

13 lb 9 oz

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35
Q

60 min cylinder capacity

A

87 cu/fit (3464 L)

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36
Q

60 min cylinder weight

A

17 lb 6 oz

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37
Q

Cylinder pressure

A

5500 psig

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38
Q

Do not pick up or carry SCBA cylinders by the ___

A

Valve handle

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39
Q

Us the ___ to pick up, carry, and set down the cylinders

A

Body of the valve assembly

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40
Q

The threaded connection on the cylinder valve assembly is used for ___

A

Filling

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41
Q

The cylinder fill incorporates a ___

A

One-way valve that allows air to enter the cylinder, but not escape

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42
Q

Why to not open the hand wheel during filling

A

Will cause air to discharge through the Snap-Change nipple

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43
Q

The E-Z Flo+ Facepiece Mounted Regulator is a ___

A

Pressure-demand regulator, which keeps a positive pressure in the facepiece at all times

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44
Q

The E-Z Flo+ Facepiece Mounted Regulator features ___

A
  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
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45
Q

HUD

A

Heads up display

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46
Q

EOSTI

A

End of Service Time Indicator

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47
Q

The Facepiece mounted regulator separates the air ___

A

Being inhaled from the exhaled air

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48
Q

Upon inhalation, the air enters the facepiece through ___

A

9 small holes on top of the facepiece mounted regulator, called the spray bar

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49
Q

The air flows across the facepiece lens, ___

A

Cooling and removing any condensation that is built up

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50
Q

The air flows through the ___ and into the user’s respiratory tract

A

Red inhalation valves in the nose cup

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51
Q

When the user exhales, the air is directed through the ___

A

Hole in the facepiece and corresponding exhalation port on the regulator

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52
Q

The exhaled air is vented through the ___ into the atmosphere

A

Regulator cover

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53
Q

The regulator does not need to be ___ between users

A

Cleaned or disinfected

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54
Q

Facepiece sizes

A

Small, medium, and large

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55
Q

The materials of the lens and bezel meet the requirements of ___

A

NFPA 1981, 2013 edition

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56
Q

The Kevlar harness of the facepiece has a reduced profile to eliminate ___

A

Bunching and discomfort under helmets

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57
Q

Mechanical voice amplification system that increases the clarity of communication between users

A

Voicemitters

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58
Q

Where is the voicemitter located?

A

One on each side of the facepiece

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59
Q

The voicemitter on the right side of the facepiece incorporates a ___

A

Mounting bracket for the SCOTT Epic 3 voice amplifier

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60
Q

Battery-powered voice amplification

A

Epic 3 voice amplifier

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61
Q

Most effective technique for communicating into a radio

A

Place the microphone directly over either of the voicemitters

62
Q

The issued Scott Facepiece meets ___ for impact resistance and splash/droplet

A

ANSI 287 + D3

63
Q

Integrated PASS device

A

Pak-Alert SE7

64
Q

The PASS device is mounted ___

A

On the back frame

65
Q

The PASS device incorporates ___

A

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
Q

Two components of the Pak-Alert

A
  1. Remote Pressure Gauge assembly
  2. Back frame Mounted Sensor module
67
Q

The Remote Pressure Gauge is located on ___

A

The user’s right side

68
Q

The remote pressure gauge has ___

A
  1. Two function buttons
  2. LED backlit analog pressure gauge
  3. LED indicator lights
  4. Photo sensing diode for HUD’s intensity
69
Q

The sensor module assembly contains ___

A
  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
Q

The Pak-Alert is powered by ___

A

6 AA batteries

71
Q

How often are the batteries in the Pak-Alert changed?

A

Twice a year

72
Q

Before changing the batteries, ensure that ___

A

The cylinder valve is off and the PASS alarm is completely inactive

73
Q

What could happen if you change the batteries while the system is pressurized?

A

Damage may occur to electronic components

74
Q

How to change the batteries

A
  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
Q

The Pak-Alert system is activated by ___

A

A pressure switch when the cylinder valve is opened

76
Q

How will the Pak-Alert system indicate activation?

A

Chirp 3 times

77
Q

Pak-Alert motion sensor characteristics

A

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
Q

Remote Pressure Gauge button characteristics

A
  1. Red and yellow
  2. Big enough to activate with gloved hand, but slightly recessed to prevent accidental activation
79
Q

Pressing the red button will ___

A

Place the PASS into full alarm mode

80
Q

Manually placing the PASS into full alarms mode can be done ___

A

With or without air in the system

81
Q

The yellow button is used to ___

A

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
Q

How will the PASS confirm deactivation?

A

2-tone beep from the sensor module and not flashing LEDs

83
Q

If you attempt to deactivate the PASS with a pressurized system ___

A

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
Q

The Pak-Alert distress alarm includes ___

A

On-board electronics which maintain a running log of event data including start-up, shut-down, and PASS activation

85
Q

The remote pressure gauge assembly incorporates an analog display built at ___

A

An angle for easier viewing and backlit by an LED

86
Q

Sensor module lights:
Bright light, then flashes green

A

Startup Pak-Alert (open cylinder)

87
Q

Sensor module lights:
Flashes green

A

Normal operation

88
Q

Sensor module lights:
Flashes orange alternately

A

Low air (1/3 cylinder)

89
Q

Sensor module lights:
Flashes orange once every 2 seconds

A

Low battery while on

90
Q

Sensor module lights:
Lights off

91
Q

Sensor module lights:
Bright light, then flashes green if good/flashes red if low

A

Press reset w/unit off (battery test)

92
Q

Sensor module lights:
Flashes green, then flashes red

A

Press manual alarm with unit off

93
Q

Sensor module lights:
Returns to flashing green

A

Press reset from manual alarm

94
Q

Sensor module lights:
flashes red (alternately)

A

PASS pre-alarm

95
Q

Sensor module lights:
Flashes red (simultaneously)

A

PASS full alarm

96
Q

Sensor module lights:
Startup Pak-Alert (open cylinder)

A

Bright light, then flashes green

97
Q

Sensor module lights:
Normal operation

A

Flashes green

98
Q

Sensor module lights:
Low air (1/3 cylinder)

A

Flashes orange (alternately)

99
Q

Sensor module lights:
Low battery while on

A

Flashes orange once every 2 seconds

100
Q

Sensor module lights:
Shut down

A

Lights off

101
Q

Sensor module lights:
Press reset w/unit off (battery test)

A

Bright light, then flashes green if good / flashes red if low

102
Q

Sensor module lights:
Press manual alarm with unit off

A

Flashes green, then flashes red

103
Q

Sensor module lights:
Press reset from manual alarm

A

Returns to flashing green

104
Q

Sensor module lights:
PASS pre-alarm

A

Flashes red (alternately)

105
Q

Sensor module lights:
PASS full alarm

A

Flashes red (simultaneously)

106
Q

The orange light is ___

A

A combination of the red, green, and white lights that appears orange from a distance

107
Q

Provides a visual monitor of the air supply in the cylinder and valve assembly

108
Q

The HUD is fitted to the ___

A

Facepiece Mounted Regulator and appears across the bottom of the user’s FOV through the lens

109
Q

The HUD consists of ___

A

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
Q

HUD initialization

A

When the air cylinder valve is open, the HUD will initialize and illuminate all five lights for twenty seconds

111
Q

Operation of all 5 HUD lights must be verified ___

A

Every time the respirator is used and during the daily function check

112
Q

After initialization, the rectangular indicator lights in the HUD will show ___

A

The level of the air supply in the cylinder

113
Q

If the lights in the HUD do not operate properly ___

A

Remove from service, form 15, and send in for repair

114
Q

When in pre-alarm the Pak-Alert will cause the HUD lights to ___

A

Flash in an alternating pattern

115
Q

The color of the remote pressure gauge light will be the same as the ___

A

Current cylinder level light showing on the HUD

116
Q

The HUD has an automatic ___

A

Brightness control

117
Q

When the batteries require changing the, the round low battery indicator will ___

A

Stay illuminated for 20 seconds. After 20 seconds it will flash slowly (once per second)

118
Q

When the low battery indicator activates, there is still sufficient power to ___

A

Operate the HUD for the duration of the cylinder

119
Q

HUD light indicators:
(R)(Y)(G)(G) (r)

A

HUD in initialization mode

120
Q

HUD light indicators:
()()(G)(G) (x)

A

Cylinder above 3/4 full

121
Q

HUD light indicators:
()()(G)(*) (x)

A

Cylinder 1/2 to 3/4 full

122
Q

HUD light indicators:
()(Y)()(*) (x)

A

Cylinder 1/3 to 1/2 full

123
Q

HUD light indicators:
(R)()()(*) (x)

A

Cylinder less than 1/3 full

124
Q

HUD light indicators:
(R)()(G)() / ()(Y)()(G)

A

Pak-Alert in Pre-alarm (alternating pattern)

125
Q

HUD light indicators:
HUD in initialization mode

A

(R)(Y)(G)(G) (r)

126
Q

HUD light indicators:
Cylinder above 3/4 full

A

()()(G)(G) (x)

127
Q

HUD light indicators:
Cylinder 1/2 to 3/4 full

A

()()(G)(*) (x)

128
Q

HUD light indicators:
Cylinder 1/3 to 1/2 full

A

()(Y)()(*) (x)

129
Q

HUD light indicators:
Cylinder less than 1/3 full

A

(R)()()(*) (x)

130
Q

HUD light indicators:
Pak-Alert in pre-alarm

A

(R)()(G)() / ()(Y)()(G) alternating

131
Q

Dual emergency breathing accessory hose connections

A
  1. LP side of the SCBA’s PRA
  2. Fitted with both male and female quick disconnect couplings
132
Q

Where is the Dual Emergency Breathing Support System stored?

A

Belt mounted carrying pouch with a snap opening on the right side of the waist pad

133
Q

The Emergency breathing support system is not a ___

A

Transfill system

134
Q

Move air from one cylinder to another on the high-pressure side of the PRA

A

Transfill system

135
Q

The emergency breathing support system allows users to share air on the ___

A

LP side of the PRA

136
Q

When used for emergency escape, the emergency breathing support system must ___

A

Remain connected and used to supply breathing support to only one other user

137
Q

Two ways to share air using the buddy breathing system

A
  1. Emergency breathing support system connection to emergency breathing support connection
  2. Emergency breathing support system connection to facepiece mounted regulator quick disconnect
138
Q

Two SCBA users share the remaining air capacity of both cylinders as long as they stay connected

A

Buddy breathing hoses connected together

139
Q

The air from only one SCBA cylinder is used to support two users

A

Buddy breathing hose connected to the receivers facepiece mounted regulator quick disconnect coupling

140
Q

How to attach buddy breathing to the facepiece mounted regulator quick disconnect

A

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
Q

Point to follow when buddy breathing is being used

A
  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
Q

The male side of the emergency breathing support system manifold can release air at up to ___ when the ___

A
  1. 150 psig
  2. Check valve sleeve is pulled back
143
Q

If damage to the buddy breathing hose occurs when connected and in use by two persons, the air loss will ___

A

Be from both cylinders

144
Q

When using buddy breathing, one user always ___

A

Maintains control of the connected manifolds

145
Q

Procedures to connect buddy breathing

A
  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
Q

How to determine proper buddy breathing connection

A
  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
Q

The buddy breathing system, facepiece mounted regulator, and remote pressure gauge are all located on the ___ of the PRA

A

Low pressure

148
Q

When cylinder pressure drops to ___, the PRA switches air flow to a secondary pathway

A

~1833 psig (1/3 capacity)

149
Q

Air exiting an alarming baddy breathing connection does so at a pressure ___

A

25 psig higher than air leaving an SCBA that is not in alarm

150
Q

If cylinders are shared, the air will deplete ___

A

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
Q

When an SCBA that is not in alarm is connected to one that is, both Vibralerts will sound due to ___

A

The higher pressure from the low SCBA overcoming the lower pressure from the full SCBA

152
Q

When removing the buddy breathing, remove the facepiece and regulator from the user ___

A

Requiring support first. Separate the regulator or manifolds from each other, and repack

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