Engine Maintenance and Operation
Exam Graded A+
The major purpose of an engine overhaul is to
A. extend the life of the cylinders and pistons.
B. inspect, repair, and replace worn engine parts.
C. evaluate the airworthiness of the crankshaft and bearings. - Answer- B
The receiving inspection for an engine needing to be overhauled
A. includes checking the airworthiness directives, service bulletins and type certificate
compliance.
B. includes an ultra-sound or eddy current inspection of the unassembled engine.
C. is performed in conjunction with tear-down of the engine. - Answer- A
Indentations on bearing races caused by high static loads are known as
A. fretting.
B. brinelling.
C. galling. - Answer- B
A severe condition of chafing or fretting in which a transfer of metal from one part to
another occurs is called
A. scoring.
B. burning.
C. galling. - Answer- C
The breaking loose of small pieces of metal from coated surfaces, usually caused by
defective plating or excessive loads is called
A. flaking.
B. chafing.
C. brinelling. - Answer- A
During visual inspection while overhauling an engine, the piston heads were depressed.
This is a sign that
A. the engine was running normally.
B. pre-ignition had occurred.
C. detonation had occurred. - Answer- C
When cleaning aluminum and magnesium engine parts, it is inadvisable to soak them in
solutions containing soap because
A. some of the soap will become impregnated in the surface of the material and
subsequently cause engine oil contamination and foaming.
B. the soap can chemically alter the metals causing them to become more susceptible
to corrosion.
, C. the parts can be destroyed by dissimilar metal electrolytic action if they are placed
together in the solution for more than a few minutes. - Answer- A
Where are sludge chambers when used in aircraft engine lubrication systems usually
located?
A. in the crankshaft throws
B. adjacent to the scavenger pumps
C. in the oil storage tank - Answer- A
Which of the following are true concerning structural inspection of engine parts during
an engine overhaul?
1. Dye penetrant can be used on aluminum, stainless, and titanium.
2. Eddy current inspection requires bare metal surfaces to be effective.
3. Resonance ultra-sound inspection is primarily used for thickness measurement.
4. Magnetic particle inspection requires fluorescent developer to see the results.
5. X-rays can be used to check the structural integrity of an engine component.
A. 1, 2, and 4
B. 1, 3, and 4
C. 1, 3, and 5 - Answer- C
On which part of the cylinder walls of a normally operating engine will the greatest
amount of wear occur?
A. Near the center of the cylinder where the piston velocity is greatest
B. Near the top of the cylinder
C. Wear is normally evenly distributed - Answer- B
During overhaul, reciprocating engine exhaust valves are checked for stretch (Figure
10-8)
A. with a suitable inside spring caliper.
B. using a manufacturer's contour or radius gauge or by the stem diameter just behind
the head.
C. by placing the valve on a surface plate and measuring its length with a vertical height
gauge. - Answer- B
Straightening nitride crankshafts is
A. recommended.
B. not recommended.
C. approved by the manufacturer. - Answer- B
In general, welding of engine parts is
A. not acceptable.
B. only allowed when approved by the manufacturer.
C. can be accomplished if listed in 14 CFR, Part 43. - Answer- B
When overhauling a certified reciprocating aircraft engine
A. only steel valve seats can be used.
Exam Graded A+
The major purpose of an engine overhaul is to
A. extend the life of the cylinders and pistons.
B. inspect, repair, and replace worn engine parts.
C. evaluate the airworthiness of the crankshaft and bearings. - Answer- B
The receiving inspection for an engine needing to be overhauled
A. includes checking the airworthiness directives, service bulletins and type certificate
compliance.
B. includes an ultra-sound or eddy current inspection of the unassembled engine.
C. is performed in conjunction with tear-down of the engine. - Answer- A
Indentations on bearing races caused by high static loads are known as
A. fretting.
B. brinelling.
C. galling. - Answer- B
A severe condition of chafing or fretting in which a transfer of metal from one part to
another occurs is called
A. scoring.
B. burning.
C. galling. - Answer- C
The breaking loose of small pieces of metal from coated surfaces, usually caused by
defective plating or excessive loads is called
A. flaking.
B. chafing.
C. brinelling. - Answer- A
During visual inspection while overhauling an engine, the piston heads were depressed.
This is a sign that
A. the engine was running normally.
B. pre-ignition had occurred.
C. detonation had occurred. - Answer- C
When cleaning aluminum and magnesium engine parts, it is inadvisable to soak them in
solutions containing soap because
A. some of the soap will become impregnated in the surface of the material and
subsequently cause engine oil contamination and foaming.
B. the soap can chemically alter the metals causing them to become more susceptible
to corrosion.
, C. the parts can be destroyed by dissimilar metal electrolytic action if they are placed
together in the solution for more than a few minutes. - Answer- A
Where are sludge chambers when used in aircraft engine lubrication systems usually
located?
A. in the crankshaft throws
B. adjacent to the scavenger pumps
C. in the oil storage tank - Answer- A
Which of the following are true concerning structural inspection of engine parts during
an engine overhaul?
1. Dye penetrant can be used on aluminum, stainless, and titanium.
2. Eddy current inspection requires bare metal surfaces to be effective.
3. Resonance ultra-sound inspection is primarily used for thickness measurement.
4. Magnetic particle inspection requires fluorescent developer to see the results.
5. X-rays can be used to check the structural integrity of an engine component.
A. 1, 2, and 4
B. 1, 3, and 4
C. 1, 3, and 5 - Answer- C
On which part of the cylinder walls of a normally operating engine will the greatest
amount of wear occur?
A. Near the center of the cylinder where the piston velocity is greatest
B. Near the top of the cylinder
C. Wear is normally evenly distributed - Answer- B
During overhaul, reciprocating engine exhaust valves are checked for stretch (Figure
10-8)
A. with a suitable inside spring caliper.
B. using a manufacturer's contour or radius gauge or by the stem diameter just behind
the head.
C. by placing the valve on a surface plate and measuring its length with a vertical height
gauge. - Answer- B
Straightening nitride crankshafts is
A. recommended.
B. not recommended.
C. approved by the manufacturer. - Answer- B
In general, welding of engine parts is
A. not acceptable.
B. only allowed when approved by the manufacturer.
C. can be accomplished if listed in 14 CFR, Part 43. - Answer- B
When overhauling a certified reciprocating aircraft engine
A. only steel valve seats can be used.
