7-8.
When making a functional check of
an oxygen regulator, holding the
emergency pressure control lever
in the TEST MASK position
produces which of the following
results on the oxygen regulator
panel?
1.
The lamp will light
2.
An increase in pressure on
the pressure gauge
3.
The flOW indicator will go to
the white position
4.
Each of the above
7-9.
What are the LOX converter’s
three sequences of operation?
1.
Service, supply, and
reservice
2.
Fill, buildup, and supply
3.
Reservice, supply, and
buildup
4.
Buildup, supply, and standby
IN ITEMS 7-10 THROUGH 7-14, SELECT FROM
COLUMN B THE SEQUENCE OF LOX SYSTEM
OPERATION THAT IS AUTOMATICALLY STARTED
BY EACH ACTION/VALVE OPERATION LISTED IN
COLUMN A. SEQUENCES OF OPERATION IN
COLUMN B B MAY BE USED MORE THAN ONCE.
7-10.
7-11.
7-12.
7-13.
7-14.
A. Actions/
B. Sequence of
Valves
Operations
Operations
The differen-
1.
Fill
tial check
valve opens
2.
Buildup
The trailer
3.
Demand mode
hose nozzle
is removed
4.
Supply-
from the
economy
converter
mode
The pressure opening valve
unseats
The trailer hose nozzle is
connected to the filler port
When oxygen becomes available at
the supply outlet
46
7-15.
When installing a section of
tubing in an aircraft’s oxygen
system, which of the following
items is permitted for use on the
threads of the tubing connectioms
prior to tightening?
1.
Locktite
2.
Waterproof grease
3.
Antiseize tape
4.
Thread compound
Learning Objective:
Identify the system compo-
nents and operation of the
onboard oxygen generating
system (OBOGS).
7-16.
Which of the following is an
advantage of the OBOGS as
compared to the LOX system?
1.
An OBOGS requires no exten-
sive depot-level maintenance
2.
An OBOGS eliminates the need
for daily servicing
3.
An OBOGS requires no special
transportation and storage
equipment
4.
Each of the above
7-17.
Scheduled preventive maintenance
occurs at what number of hours on
the OBOGS?
1.
1,000 hours
2.
2,000 hours
3.
3,000 hours
4.
4,000 hours
7–18.
Through which of the following
components does the OB0GS receive
engine bleed air?
1.
Engine turbine
2.
Heat exchanger
3.
Cooling turbine
4.
Ram air outlet
7-19.
Which, if any, of the following
elements is retained in the
molecular sleeve beds as the
airflow passes through them?
1.
Oxygen
2.
Nitrogen
3.
Argon
4.
None of the above
