SCBA Flashcards
T/F SCBA will protect u from CBRN agents?
False
SCBA in conjuction with PPC (level A entry suit)+ proper Haz Mat training
Can airborne contaminants enter respiratory track through a punctured or ruptured ear drum?
Yes they can
Actual work and exit time with scba will depend upon what?
ps it is individuals responsibility to know there work/exit time.
physical conditioning
type of work load
physical characteristics
training and another of other factors
There are 3 things that make the definition of confined space?
PS a windowless building can be considered confined space
not designed for human occupancy
large enough so a person can enter/work
has limited means for entry and escape
Scba cylinders are pressurized to what psi?
4500
all size cylinders are pressurized to this
How many years is the service life of a scba cylinder?
PS extra cylinder stored on its sides
15 years
Scba hydrostatic test is done, How often?
every 5 years. This info is found on the top of cylinder.
PS a round sticker on side means it was retested at some point
When does the vibralert and hud actuate?
App. 25% of a full cylinder.
they are independently of each other and may not go off at the same time
When do spare scba cylinders get inspected?
Mondays
T/F When depleting a cylinder of air it is ok to leave valve in open position.
False
moisture and contaminants will build up inside
How do u identify a training cylinder?
Blue top or a polymer protective sleeve, not to be used for
firefighting
Can u use a wrench to tighten down on a scba coupling?
Never
What tools do u use to change out an O-Ring on the scba?
1/8 allen wrench
7/16 open end wrench
T/F UAC is for emergency use only?
True
when FF is incapacitated it is used also has a relief valve so not to over pressurize the cylinder
A scba with a missing dust cover, What happens next?
Put it out of service.
PRA is located on the left side of the back frame it reduces the air pressure to ______ psi before entering the regulators low pressure hose.
100
the regulator controls the pressure to slightly above atmospheric in face piece
Scba malfunction in the primary will automatically direct into the secondary, operating pressure is now reduced to ___ psi
150
vibralert will activate
Failure of primary and secondary in open position will activate relief valve in PRA which will discharge all pressure in excess of ____ psi
185
Partially close cylinder.
PS low press hose 100, facepiece slightly above atmospheric,operating press in secondary 150
PRA reduces air to ____ psi.
Primary malfunction to secondary is reduced ___ psi.
Failure of both discharges pressure in excess to ____ psi.
100 150 185 (partial closure of cylinder) Regulator in facepiece to slightly above atmospheric Know this card*
If the scba manual shut off switch is not pressed it will deplete a 45 min cylinder in _____ min?
App 4 minutes
When donning the facepiece and the manual release fails to release, What is the next step?
turn red purge valve (on left) downward 180 degrees to start the flow of air.
Ps if downed member turn purge halfway
Purge valve emergencies. Failure of regulator in closed position ( no air in face). What is next step?
Know this card*
Turn purge counter-clockwise. Now if too much air u keep purge full open and partially close cylinder.
This can be done when severe damage to facepiece also
manual shut off switch fails to release.
Where is the vibralert alarm located?
Within the regulator assembly it gives both audible and vibratory action. Regulator gets 1/4 turn on face piece
Snap lock is on what side of regulator?
right side (D-ring also on right) purge up then rotate clockwise until it snaps into place