A & P – POWERPLANT ORAL (JEPPESEN)
NEWEST EXAM 2025 WITH MULTIPLE
CHOICE OF QUESTIONS AND DETAILED
SOLVED SOLUTIONS ALREADY GRADED A+
AND 100% GUARANTEE PASS ( BRAND
NEW!!!!!!)
Where should piston ring gaps be installed relative to each
other, and why? - CORRECT ANSWER-Compression ring gaps should
be staggered so that they do not align. This prevents excessive
blow-by.
What could result from incorrectly installed piston rings? -
CORRECT ANSWER-Excessive oil consumption.
What purpose do oil control rings serve? - CORRECT ANSWER-They
regulate the thickness of the oil film on the cylinder walls.
What is used to help prevent valve surge or floating in an
aircraft engine? - CORRECT ANSWER-Two or more springs are used
on each valve.
On engines equipped with hydraulic valve lifters, what should
the running valve clearance be? - CORRECT ANSWER-Zero.
,What is the purpose of valve overlap? - CORRECT ANSWER-It allows
better volumetric efficiency and lowers cylinder operating
temperatures
What indications are given in the event of a leaking or open
primer while the engine is running? - CORRECT ANSWER-The engine
will not idle properly.
A cold cylinder is found when troubleshooting a running
engine. What does this indicate? - CORRECT ANSWER-No
combustion in that cylinder.
When pulling a propeller through, a hissing sound is heard,
indicating valve blow-by. What procedure should be performed
next? - CORRECT ANSWER-A compression check should be
performed to identify the faulty cylinder.
What is the purpose of performing a compression test? - CORRECT
ANSWER-To determine if the valves, pistons, and rings are sealing
properly
When an engine is overhauled, how is the total time affected?
When an engine is rebuilt, how is its operating history affected?
- CORRECT ANSWER-The total time on the engine must be continued
and the time since major overhaul is entered into the engine
log. It the manufacturer rebuilds the engine, it is granted a
zero-time status and is considered to have no previous
operating history.
,What inspections should be performed after a propeller strike
without sudden stoppage? - CORRECT ANSWER-1.Inspect engine
mounts, the crankcase, and the nose section for damage.
2.Inspect the oil and oil filters/screens for metal particles.
3.Inspect the crankshaft or driveshaft for cracks and
misalignment.
Name some of the precautions that should be performed prior
to engine removal. - CORRECT ANSWER-Disconnect the battery, turn
off the fuel valves, chock the wheels, and if necessary, install a
tail stand.
When inspecting a piston, where are cracks most likely to be
found? - CORRECT ANSWER-In those areas that are highly stressed;
usually the base of the piston bosses, inside at the junction of
the bore and the walls, and the ring lands.
What does it mean if an engine part is within "serviceable
limits"? - CORRECT ANSWER-It means that the part is within the
manufacturer's limits and can be used in an engine (does not
require replacement).
What tools or instruments are used to inspect a cylinder barrel
for out-of-roundness? - CORRECT ANSWER-A dial indicator or an
inside micrometer is usually used to measure the top of the
cylinder and at the skirt. A telescopic gauge and micrometer can
also be used. Two readings should be taken 90# to each other.
How can a loose stud in an engine crankcase be repaired? -
CORRECT ANSWER-Remove the loose stud and inspect the hole for
, size and thread condition. It may be necessary to use an
oversize stud or Heli-Coil.
What publication is used to check an engine for normal
operation? - CORRECT ANSWER-Manufacturer's maintenance
manual.
A weak cylinder is found during a compression check. What
must be inspected? - CORRECT ANSWER-The inside of the cylinder.
What purpose does an oil analysis serve? - CORRECT ANSWER-Metal
particles in the oil show normal and abnormal wear of the
engine. This helps in evaluating the engine's internal condition.
What inspections should be performed on an engine that has
been in storage? - CORRECT ANSWER-Perform an inspection to
determine if there is any corrosion damage.
Where would a carburetor air temperature bulb be located? -
CORRECT ANSWER-In the ram air intake duct.
What is the fuel pressure range on float-type carburetors? -
CORRECT ANSWER-3 to 5 psi.
Where is the fuel flow indicating system generally connected
within a carbureted reciprocating engine? - CORRECT ANSWER-
Between the engine fuel pump and the indicator.
NEWEST EXAM 2025 WITH MULTIPLE
CHOICE OF QUESTIONS AND DETAILED
SOLVED SOLUTIONS ALREADY GRADED A+
AND 100% GUARANTEE PASS ( BRAND
NEW!!!!!!)
Where should piston ring gaps be installed relative to each
other, and why? - CORRECT ANSWER-Compression ring gaps should
be staggered so that they do not align. This prevents excessive
blow-by.
What could result from incorrectly installed piston rings? -
CORRECT ANSWER-Excessive oil consumption.
What purpose do oil control rings serve? - CORRECT ANSWER-They
regulate the thickness of the oil film on the cylinder walls.
What is used to help prevent valve surge or floating in an
aircraft engine? - CORRECT ANSWER-Two or more springs are used
on each valve.
On engines equipped with hydraulic valve lifters, what should
the running valve clearance be? - CORRECT ANSWER-Zero.
,What is the purpose of valve overlap? - CORRECT ANSWER-It allows
better volumetric efficiency and lowers cylinder operating
temperatures
What indications are given in the event of a leaking or open
primer while the engine is running? - CORRECT ANSWER-The engine
will not idle properly.
A cold cylinder is found when troubleshooting a running
engine. What does this indicate? - CORRECT ANSWER-No
combustion in that cylinder.
When pulling a propeller through, a hissing sound is heard,
indicating valve blow-by. What procedure should be performed
next? - CORRECT ANSWER-A compression check should be
performed to identify the faulty cylinder.
What is the purpose of performing a compression test? - CORRECT
ANSWER-To determine if the valves, pistons, and rings are sealing
properly
When an engine is overhauled, how is the total time affected?
When an engine is rebuilt, how is its operating history affected?
- CORRECT ANSWER-The total time on the engine must be continued
and the time since major overhaul is entered into the engine
log. It the manufacturer rebuilds the engine, it is granted a
zero-time status and is considered to have no previous
operating history.
,What inspections should be performed after a propeller strike
without sudden stoppage? - CORRECT ANSWER-1.Inspect engine
mounts, the crankcase, and the nose section for damage.
2.Inspect the oil and oil filters/screens for metal particles.
3.Inspect the crankshaft or driveshaft for cracks and
misalignment.
Name some of the precautions that should be performed prior
to engine removal. - CORRECT ANSWER-Disconnect the battery, turn
off the fuel valves, chock the wheels, and if necessary, install a
tail stand.
When inspecting a piston, where are cracks most likely to be
found? - CORRECT ANSWER-In those areas that are highly stressed;
usually the base of the piston bosses, inside at the junction of
the bore and the walls, and the ring lands.
What does it mean if an engine part is within "serviceable
limits"? - CORRECT ANSWER-It means that the part is within the
manufacturer's limits and can be used in an engine (does not
require replacement).
What tools or instruments are used to inspect a cylinder barrel
for out-of-roundness? - CORRECT ANSWER-A dial indicator or an
inside micrometer is usually used to measure the top of the
cylinder and at the skirt. A telescopic gauge and micrometer can
also be used. Two readings should be taken 90# to each other.
How can a loose stud in an engine crankcase be repaired? -
CORRECT ANSWER-Remove the loose stud and inspect the hole for
, size and thread condition. It may be necessary to use an
oversize stud or Heli-Coil.
What publication is used to check an engine for normal
operation? - CORRECT ANSWER-Manufacturer's maintenance
manual.
A weak cylinder is found during a compression check. What
must be inspected? - CORRECT ANSWER-The inside of the cylinder.
What purpose does an oil analysis serve? - CORRECT ANSWER-Metal
particles in the oil show normal and abnormal wear of the
engine. This helps in evaluating the engine's internal condition.
What inspections should be performed on an engine that has
been in storage? - CORRECT ANSWER-Perform an inspection to
determine if there is any corrosion damage.
Where would a carburetor air temperature bulb be located? -
CORRECT ANSWER-In the ram air intake duct.
What is the fuel pressure range on float-type carburetors? -
CORRECT ANSWER-3 to 5 psi.
Where is the fuel flow indicating system generally connected
within a carbureted reciprocating engine? - CORRECT ANSWER-
Between the engine fuel pump and the indicator.
