Flashcards in SCBA Manual Chapter 2 pp 13-22 - Sheet1 Deck (76)
What side of the SCBA backframe is the pressure reducer assembly located?
The redundant dual path reducing system, automatic transfer valve and over pressure relief valve are all components of what?
Pressure Reducer Assembly
After air leaves the SCBA supply cylinder through the cylinder valve, it then travels into?
High pressure hose
Air from the SCBA travels through the high pressure hose and then enters?
Pressure Reducing Regulator
Air enters the pressure reducing regulator at what PSI?
Existing Cylinder Pressure
The primary reducing circuit reduces the air pressure to what PSI?
After the air pressure is reduced by the primary reducing circuit, air then travels into ___________ ____________ ____________ and then into ___________ __________ __________?
Low Pressure Hose and then into Mask Mounted Regulator
When cylinder air pressure falls between ______ and ______psi a transfer valve opens allowing the secondary pressure reducing circuit to function
1000 & 1200
When the primary pressure reducing circuit fails in the _________ position, a transfer valve opens allowing the secondary pressure reducing circuit to function.
The secondary pressure reducing circuit reduces cylinder air pressure going to mask-mounted regulator to _______psi.
The extra 50psi that's supplied by the secondary pressure reducing circuit is used to activate what?
The ________ _________ is an audible & tactile end of service life indicator.
The outlet manifold of the pressure reducer assembly is the attachment point for the _______ pressure hose.
The outlet manifold of pressure reducer assembly is the attachment point for the low pressure hose and contains a resettable over pressure relief valve set at ______psi.
The over pressure relief valve vents excess pressure to the ___________ to protect the low pressure hose and breathing regulator from pressure over 225psi should the primary reducing circuit fail in the open position.
When the relief valve on the outlet manifold opens, the air pressure supplied to the low pressure hose and breathing regulaotr will be between _______-_______psi.
The Vibralert alarm will activate when less than __________% of the full pressure remains in the air supply cylinder.
In the event the primary reducing valve fails in the ________ position and the secondary reducing circuit opens, air at over 225psi to enter the outlet manifold, the relief valve on the outlet manifold will open.
The air saver switch, spray bar and spring clip are a few of the compnents that make up the?
E-Z Flo Breathing Regulator
The _________ __________ ___________reduces the air pressure supplied by the pressure reducer assembly before air enters the face piece.
Mask-mounted Breathing Regulator
With proper seal, the Mask-mounted Breathing Regulator produces a pressure of approximately ______ to ______psi above atmospheric pressure inside the facepiece.
.036 to .054psi
When the user breathes out, the integral exhalation valve vents the exhaled air, while maintaining _________ __________ inside the properly fitted facepiece.
Inhaling sharply into your mask, with the cylinder valve on, will release the _________ _________ ___________ and allow air to flow.
Air Saver Switch
The component of the mask that helps keep the lens free of condensation is called the what?
The Spray Bar is comprised of _________ holes and is located in the upper part of the regulator assembly.
The ______ _________ is located on the right side of the regulator assembly and is used to secure the facepiece to the regulator.
When opening the purge valve, air is allowed to enter the facepiece through the _______ _________.
When the purge valve is in the off position, the indicator knob shall be pointed in what position?
Which component of the facepiece and mask-mounted breathing regulator may be used momentarily to de-fog the mask?