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63 Cards in this Set
- Front
- Back
Oil itself is the source of which of
the following types of contamination? |
Carbon
|
|
Which of the following conditions
causes fuel to flow into an oil system? |
A ruptured fuel–oil cooler
|
|
Synthetic oils have a shelf life for
which of the following reasons? |
Old oil will cloud or form
contaminants |
|
What is the NATO number for the
primary oil used in jet engines? |
0-156
|
|
In the wet–sump lubrication system,
oil is stored in an oil tank BEFORE being cooled. |
False
|
|
Which of the following lubrication
systems are you most likely to encounter in the fleet? |
Dry–sump
|
|
Which of the following components is
found on dry–sump lubrication systems but usually not on wet-sump systems? |
Oil cooler
|
|
Which of the following statements is
NOT true concerning the advantages of the dry–sump lubrication system? |
No external oil cooler is
required |
|
What is the capacity of the dry–sump
oil tank? |
3.25 gallons
|
|
Oil tank flapper valves are most
likely to be closed under which of the following flight conditions? |
When decreasing aircraft speed
|
|
Which of the following statements is
correct concerning components used for handling foaming oil? |
All oil tanks provide an
expansion space for foaming |
|
Scavenge elements of all types of
oil pumps used in the system have greater pumping capacity than the pressure elements for what reason? |
To prevent oil from collecting
in the bearing pumps |
|
What are the three most common types
of oil pumps? |
Gear, gerotor, and piston
|
|
Under which of the following
circumstances does oil flow through the relief valve of the gear-type oil pump? |
pressure pump output is too high
|
|
What factor determines the output
pressure of the gerotor–type oil pump? |
Engine rpm
|
|
Check valves are used to prevent
hazardous accumulations of oil due to which of the following actions? |
Gravitational force after the
engine is shut down |
|
The main oil filters strain the oil
at what point in the system? |
Just as it leaves the pressure
pump |
|
What component receives the oil
after it flows through the lastchance filter and onto bearing surfaces? |
Spray nozzles
|
|
All magnetic chip detectors
illuminate a warning light in the cockpit, indicating a possible engine failure. |
False
|
|
Some engines use an oil cooler made
of rectangular-sectioned aluminum tubing spirally wound between two flanges. This type of cooler acts as what other component? |
Inlet air duct
|
|
What governs the ability of an oil
cooler to cool the oil that passes through it? |
The amount of air passing
through it |
|
In an engine using a fuel–oil heat
exchanger. oil temperature is governed by a thermostatic valve that regulates the flow of |
oil through the heat exchanger
only |
|
What is the best method of oil jet
delivery for the lubrication system? |
Solid oil spray
|
|
What component is usually included
on the scavenge oil line? |
Temperature gauge
|
|
What unit prevents pressure within
the oil tank from rising above or falling below the outside pressure? |
The oil tank vent
|
|
What is the purpose of the oil tank vent system pressure relief valves?
|
To assure a positive flow to the
oil pump |
|
Which of the following are examples
of the three main types of seals used in jet engines oil systems? |
Synthetic, carbon, and labyrinth
|
|
Synthetic seals come in many shapes
and are reusable. |
False
|
|
Which of the following oil seals is
usually spring–loaded? |
Carbon
|
|
Which of the following types of oil
seals used in the jet engine bearing support housing can be pressurized to minimize oil leakage? |
labyrith
|
|
In aircraft equipped with an
electrical metal chip detector, what indication alerts the pilot to metal contamination in the oil? |
A warning light
|
|
Why is the immediate location of any
leak important? |
Part failure or loss of an
engine may result |
|
Which of the following publications
will give you additional information about packing shelf life? |
NAVSUP Pub 4105
|
|
It is important to keep seals and
packings in their original unopened packages for which of the following reasons? 1. Seals and packings deteriorate when exposed to light and moisture when opened 2. Flattening or creases of seals and packings occur after opening 3. Both 1 and 2 above 4. It is important for identification purposes only |
3. Both 1 and 2 above
|
|
What is the greatest difficulty
encountered when a gasket, packing, or seal is replaced? |
Installing it properly
|
|
During which, if any, of the
following maintenance actions should you use a direct pressure reading gauge? |
Before and after making any oil
pressure adjustments |
|
Which of the following actions is
required for screens removed from a screen and spacer type oil filter? |
3. Route old screens to AIMD for
ultrasonic cleaning |
|
What is the most probable cause of
high oil pressure in the internal oil system? |
Low oil temperature
|
|
Which of the following corrective
actions is required for a turboprop engine reduction gearbox with a fixed orifice oil system and with high oil pressure? |
Replace engine
|
|
Metal particles found in mag plugs
are always cause for engine removal. |
False
|
|
A silver particle dropped in nitric
acid produces what reaction? |
A whitish fog
|
|
Which of the following acids is used
to detect if chromium is present in particles found in engine oil strainers? |
Hydrochloric acid
|
|
Which of the following items is used
to determine if aluminum is present in particles found in oil strainers? |
Hydrochloric acid
|
|
What two methods are used for early
detection of oil contamination? |
Magnetic chip detector and the
Navy Oil Analysis Program |
|
What activity provides information
concerning sampling points, techniques, and intervals for the NOAP program? |
CFA
|
|
During which, if any, of the
following maintenance actions should you use a direct pressure reading gauge? |
m
|
|
Wear metals are generated by the
relative motion between metallic parts in moving contact in an unlubricated mechanical system. |
False
|
|
For normally operating equipment,
wear is produced at what rate? |
Constant rate
|
|
During initial break–in, new or
newly overhauled engine assemblies tend to produce which of the following concentrations of wear metals? |
High
|
|
What is the total number of methods
of spectrometric oil analysis? |
Two
|
|
When using the atomic emission
method of spectrometric analysis, which of the following heat sources is used to energize the atomic structure of metal elements suspended in oil? |
High–voltage spark
|
|
When using the atomic emission
method of spectrometric analysis, which of the following heat sources is used to energize the atomic structure of metal elements suspended in oil? |
high voltage spark
|
|
When using the atomic absorption
method of spectrometric analysis to determine the concentration of wear metals in lubricating fluid, which of the following items is absorbed by the vaporized elements? |
light ebergy
|
|
Spectrometric fluid analysis is
effective only for those failures that are characterized by a normal increase in the wear metal content of the lubricating fluid. |
true
|
|
A sudden increase of wear metals in
one component and a decrease in another component should be considered a problem related to |
improper sampling of both
components |
|
Oil sampling intervals should NOT
vary from that specified for a given type/model/series of equipment by more than what prescribed amount? |
±10%
|
|
Which of the following is NOT
considered a routine sample under the oil analysis program? 1. Samples requested by the CFA 2. Samples taken following an accident 3. Samples taken before and after the replacement of a major oil lubricating component 4. Each of the above |
Each of the above
|
|
The two basic methods of taking a
fluid sample are the dip tube technique and what other technique? |
drain
|
|
Which of the following is a
necessary practice when performing the drain method to obtain a fluid sample? |
AllOW fluid to flow before
taking samples |
|
What form should you use when
requesting an oil analysis of an oil sample at a laboratory at a deployed site? |
DD Form 2026
|
|
Which of the following oil samples
require(s) a logbook entry? 1. Routine oil sample 2. Samples taken after a check flight for engine change 3. When changing monitoring laboratories 4. All of the above |
4. All of the above
|
|
An oil analysis request includes
which of the following information? |
4. All of the above
|
|
Which of the following publications
contains complete information concerning the Navy Oil Analysis Program (NOAP)? |
NAVMATINST 4731.1
|