5-12.
A spongy response during a
hydraulic system operation would
normally be caused by what type of
contamination?
1. Air
2.
Water
3.
Inorganic
4.
Particulate
5-13.
Chlorinated solvents will hydrolyze
to form hydrochloric acids when
allowed to combine with minute
amounts of which of the following
substances?
1.
Oil
2.
Fuel
3.
Water
4.
Oxygen
5-14.
A hydraulic oil cooler leak would
cause which of the following types
of contamination?
1. Air
2.
Particulate
3.
Foreign fluid
4.
Nonmetallic solid
5-15.
You can minimize the introduction
of external or self-generated
contaminants before collecting a
hydraulic fluid sample by taking
which of the following precautions?
1.
Cleaning the internal parts of
the fitting
2.
Cleaning the external parts of
the valve or fitting only
3.
Dumping a small amount of the
initial fluid flow only
4.
Cleaning the external parts of
the valve or fitting and
dumping a small amount of the
initial fluid flow
5-16.
You should take a fluid sample from
what point in a hydraulic system?
1.
Downstream of any return line
filters
2.
Downstream of any suction line
filters
3.
From the system reservoir if it
is the makeup type
4.
Upstream of any return or
suction line filters
5-17.
The internal porting of a sampling
point should not impede the passage
of hard particulate matter up to
what maximum diameter?
5-18.
What is the primary hydraulic fluid
contamination measurement method
used at all levels of maintenance?
1. Visual
2.
Patch testing
3.
Halogen testing
4.
Electronic particle count
analysis
5-19.
When you perform a hydraulic fluid
patch test, the appearance of
droplets or a stain on the test
filter is an indication of what
condition?
5-20.
Before you sample SE hydraulic
systems, the fluid must be
recirculated at the full flow rate
a minimum of how many minutes?
1. 5 min
2.
10 min
3.
15 min
4.
20 min
5-21.
Aircraft filter assemblies are
sampled by removing the filter bowl
and transferring the fluid contents
of both the bowl and the element to
a clean sample bottle.
1. True
2.
False
5-22.
When processing a hydraulic fluid
sample, you must use what type of
filter?
1. Single 20-mm test filter
2.
Single 47-mm test filter
3.
Double 21-mm test filter
4.
Double 47-mm test filter
5-23.
You are processing a fluid sample
and you have poured the hydraulic
fluid from the graduate into the
funnel.
What total amount of
solvent should you pour into the
graduate?
1. 15 mL
2.
50 mL
3.
100 mL
4.
120 mL
1.
250 microns
2.
500 microns
3.
750 microns
4.
900 microns
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