A&P - Powerplant Oral (Jeppesen) | questions
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Terms in this set (276)
What is the purpose of dynamic They reduce engine vibration.
dampers on crankshafts?
What types of bearings are generally Plain, ball and roller bearings.
found in reciprocating engines?
Are the connecting rods used in each No. Radial engines use master and articulating rod
cylinder of a radial engine the same? assemblies.
Explain.
Name the different types of piston Oil control, compression, and oil scraper.
rings.
Where should piston ring gaps be Compression ring gaps should be staggered so
installed relative to each other, and that they do not align. This prevents excessive
why? blow-by.
What could result from incorrectly Excessive oil consumption.
installed piston rings?
What purpose do oil control rings They regulate the thickness of the oil film on the
serve? cylinder walls.
, What is used to help prevent valve Two or more springs are used on each valve.
surge or floating in an aircraft
engine?
On engines equipped with hydraulic Zero.
valve lifters, what should the running
valve clearance be?
What is the purpose of valve It allows better volumetric efficiency and lowers
overlap? cylinder operating temperatures
What indications are given in the The engine will not idle properly.
event of a leaking or open primer
while the engine is running?
A cold cylinder is found when No combustion in that cylinder.
troubleshooting a running engine.
What does this indicate?
When pulling a propeller through, a A compression check should be performed to
hissing sound is heard, indicating identify the faulty cylinder.
valve blow-by. What procedure
should be performed next?
What is the purpose of performing a To determine if the valves, pistons, and rings are
compression test? sealing properly
When an engine is overhauled, how The total time on the engine must be continued and
is the total time affected? When an the time since major overhaul is entered into the
engine is rebuilt, how is its operating engine log. It the manufacturer rebuilds the engine,
history affected? it is granted a zero-time status and is considered to
have no previous operating history.
and answers | latest update
Save
Terms in this set (276)
What is the purpose of dynamic They reduce engine vibration.
dampers on crankshafts?
What types of bearings are generally Plain, ball and roller bearings.
found in reciprocating engines?
Are the connecting rods used in each No. Radial engines use master and articulating rod
cylinder of a radial engine the same? assemblies.
Explain.
Name the different types of piston Oil control, compression, and oil scraper.
rings.
Where should piston ring gaps be Compression ring gaps should be staggered so
installed relative to each other, and that they do not align. This prevents excessive
why? blow-by.
What could result from incorrectly Excessive oil consumption.
installed piston rings?
What purpose do oil control rings They regulate the thickness of the oil film on the
serve? cylinder walls.
, What is used to help prevent valve Two or more springs are used on each valve.
surge or floating in an aircraft
engine?
On engines equipped with hydraulic Zero.
valve lifters, what should the running
valve clearance be?
What is the purpose of valve It allows better volumetric efficiency and lowers
overlap? cylinder operating temperatures
What indications are given in the The engine will not idle properly.
event of a leaking or open primer
while the engine is running?
A cold cylinder is found when No combustion in that cylinder.
troubleshooting a running engine.
What does this indicate?
When pulling a propeller through, a A compression check should be performed to
hissing sound is heard, indicating identify the faulty cylinder.
valve blow-by. What procedure
should be performed next?
What is the purpose of performing a To determine if the valves, pistons, and rings are
compression test? sealing properly
When an engine is overhauled, how The total time on the engine must be continued and
is the total time affected? When an the time since major overhaul is entered into the
engine is rebuilt, how is its operating engine log. It the manufacturer rebuilds the engine,
history affected? it is granted a zero-time status and is considered to
have no previous operating history.
