6-21.
If the pressure gauge on a 500
psi low-pressure system indicates
125 psi, what fractional part of
the oxygen is left?
1.
One-fourth
2.
One-half
3.
Two-thirds
4.
Three-fourths
6-22.
High-pressure gaseous oxygen
system pressure gauges mounted at
each flight statiom are
calibrated to indicate pressure
ranging from 0 to what maximum
pressure?
1.
500 psi
2.
1,500 psi
3.
1,800 psi
4.
2,000 psi
Learning Objective:
Identify safety
precausions, components,
installation and testing
of components, and
operating procedures for
liquid oxygen (LOX)
systems.
1. -320°F
2. -297°F
3. -220°F
4. -182°F
6-23.
What type of oxygen system
usually uses pressure reducers in
1.
2.
3.
4.
the distribution lines?
Law-pressure system
High-pressure system
Reduced high-pressure system
Reduced low-pressure system
1.
962-1
2.
862-1
3.
782-1
4.
692-1
6-24.
In the reduced high-pressure
oxygen system, a malfunctioning
pressure reducer will be
indicated by which of the
following actions?
1.
Rapid decline of quantity on
the quantity gauge
2.
Illumination of the low
quantity light
3.
Both 1 and 2 above
4.
Rupture of the green disc in
the discharge indicator
6-25.
What items or devices should be
used as a handle to carry the
portable oxygen walkaround unit?
1.
Regulator
2.
Straps
3.
Breathing tube
4.
Copper tubing
6-26.
An AME can intelligently locate a
malfunctioning component in a
gaseous oxygen system without
being familiar with the system or
knowing the function of each
component within the system.
40
6-27. Liquid oxygen will remain a
liquid under normal atmospheric
pressure at what temperature?
6-28. What is the expansion ratio of
liquid oxygen to gaseous oxygen?
6-29. Personnel that could be exposed
to accidental spillage of LOX
must wear which of the following
equipment?
1.
Face shield
2.
Gloves and oxygen safety
shoes
3.
Coveralls
4.
Each of the above
6-30. The combustion supporting
potential of oxygen is a greater
danger than freezing.
1.
True
2.
False
6-31. When transferring LOX from one
container to another, which of
the following precautions should
be taken?
1. Pour slowly to avoid
splashing the liquid out of
the container
2. Four slowly to allow the
receiving receptacle to cool
sufficiently without thermal
breakage
3. Both 1 and 2 above
4. Minimize LOX from venting
into the atmosphere by
pouring as rapidly as
possible
1. True
2. False
