Assignment 9
Auxiliary Machinery (continued)
Textbook Assignment: Engineman 1&C, NAVEDTRA 10543-E1, Pages 7-5 through 7-22
Learning Objective: Point out the
general practices, maintenance
requirements, and tests necessary
for proper operation of air compressor
components, and identify safety
precautions to be followed.
9-1.
What is the purpose of the quarterly
inspections given the surfaces of air
flasks?
1.
To detect external corrosion or damage
2.
To detect internal corrosion or damage
3.
To determine the effectiveness of zinc
chromate primer in protecting internal
surfaces
4.
To determine the effectiveness of zinc
chromate primer in protecting internal
and external surfaces
9-2.
Air system equipment must be drained of
excessive moisture and oil deposits at
frequent intervals in order to minimize
which of the following problems?
1.
Internal corrosion
2.
Fouling of moving parts
3.
The danger of an explosion resulting
from oil accumulation
4.
Each of the above
9-3.
What situation would justify having air
flasks inspected prior to the elapse of
the normal operating interval between
inspections?
1.
Major overhaul of the compressor
2.
Excess oil being carried into the
flask
3.
Suspicion of serious corrosion of the
air flask
4.
Compressor unable to maintain the
designed pressure on the flask
9-4.
Air flasks should be thoroughly cleaned,
inspected, and painted internally with a
protective coating of zinc chromate prior
to applying a hydrostatic test.
9-5.
How often should an idle motor-driven
compressor be routinely started and
operated?
1.
Weekly
2.
Monthly
3.
Quarterly
4.
Semiannually
9-6.
Which of the following air compressor
tests is normally carried out annually?
1.
Capacity test
2.
Full pressure test
3.
Regulating devices test
4.
Starting and operating power test
9-7.
Which of the following air compressor
tests is normally carried out during a
shipyard overhaul period?
1.
Capacity test
2.
Full pressure test
3.
Hydrostatic pressure test
4.
Relief valve pressure test
9-8.
How often must the air compressor
intercooler and aftercooler tube bundles
be removed for cleaning?
1.
During each shipyard overhaul
2.
Quarterly
3.
Semiannually
4.
Annually
THIS SPACE LEFT BLANK INTENTIONALLY
Question 9-4 is to be judged True or
False.
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