SCBA Manual Appendix -A- - Sheet1 Flashcards
From SCBA:
When the Cylinder valve is opened, air will enter the pressure reducer through the high pressure hose inlet and into where?
Into both the primary and Secondary ports through the center of the primary and secondary pistons.
From SCBA:
Air passing through the Secondary pressure reducer piston is sent through the outlet port to the mask mounted regulator at a pressure of ?
A pressure of 145 to 165 psig.
From SCBA:
Air supplied from the Secondary pressure reducer is prevented from entering the Primary breathing port by ?
The low cylinder transfer valve and the automatic transfer valve.
From SCBA:
The pressure reducer operaing from the primary stage sends air pressure in the range of __ to __ to the Mask Mounted regulator?
85 to 110 psig.
From SCBA:
The action of the primary reducer is repeated for each inhalation/exhalation cycle until the cylindar pressure is reduced to approximately ?
20 to 25% of the rated service pressure of the cylinder and valve assembly.
From SCBA:
Secondary pressure of 145 to 165 psig. will activate ___ in the mask mounted regulator?
Viberalert
From SCBA:
In the unlikely event the primary pressure reducer fails in the closed position the ___ will automatically take over the reducer function and activate the viberalert alarm while the user continues to breath normally.
Secondary Reducer
From SCBA:
Primary pressure reducer function failure can be simulated how?
By pushing in and holding the “Press to Test” button located in the end of the top cover of the pressure reducer.
From SCBA:
The Purge Knob on the side of the Mask Mounted Regulator is a manual over ride allowing the user to create a constant flow of air into the facepiece at a flow of up to ___?
225 Liters per minute
