Save
P
o
w
e
r
p
l
a
n
t
o
r (Powerplant oral (2026 Edition)
a
l
Students
also
studied
3/30/2026, 5:30:11 PM 3/30/2026, 5:30:09 PM
Terms in this set (322)
what procedure should be followed when valve Perform a cylinder compression test to identify the faulty cylinder
blow-by is indicated by a hissing sound on a
reciprocating engine when pulling the propeller
through?
What is the running valve clearance on engines Zero
equipped with hydraulic valve lifters
When troubleshooting a running engine Lack of combustion in that cylinder
malfunction. what does a cold cylinder indicate?
, What factors about the condition of an engine can The results of a compression test determine if the valves, piston rings,
be learned by studying the results of a compression and pistons are adequately sealing
test?
What should be done to repair a loose stud in an Remove the loose stud, and inspect the hole for size and the condition of
engine crankcase? the threads. It may be neccessary to use a suitable oversize stud
How is a cylinder barrel inspected for it of A Dial indicator can be used to measure at the top of the cylinder and
roundness? also at the skirt. 2 readings should be taken, 90° to each other
What types of connecting rods are commonly found Master and articulated rod assemblies
in radial engines?
What are the different types of piston rings? Compression, oil control and oil scrapper
What are the purpose of oil control rings? Oil control rings regulate the thickness of the oil film on the cylinder wall
(Powerplant oral (2026 Edition)
What types of bearings are in general use in Plain, ball and roller
reciprocating engines?
Where are cracks most likely to be found in a Highly stressed areas, the base of the pin bosses, inside at the junction
piston? of the head and walls. and the ring lands
How are piston gaps installed relative to each other Compression ring gaps should be installed in staggered positions around
on a piston, and why? the piston in order to prevent excessive blow-by
What is the purpose of valve overlap? It permits better volumetric efficiency and lowers the cylinder operating
temperature
What is the purpose of crankshaft dynamic To reduce engine vibration
dampers?
3/30/2026, 5:30:11 PM 3/30/2026, 5:30:09 PM
What is meant when it is said that an engine part is It will not likely wear to a point of causing engine failure within the next
within "serviceable limits"? time between overhaul interval
Name at least one part of an inspection that should inspect the engine mounts, crankcase, and nose section for damage
be made after a propeller strike (not sudden stop)
inspect the oil and oil screens/filters for metal particles
inspect the propeller drive shaft or crankshaft for misalignment
What are some of the precautions to be observed Disconnect the battery, chock the wheels, install a tail stand (if needed),
when preparing an aircraft for engine removal? and turn off the fuel valves
What is an indication that a primer is leaking or is The engine will not idle properly
open during engine operation?
What may be the result of incorrect installation of Excessive oil consumption
piston rings?
, What are some indications of induction system Low power and uneven running
leakage?
When an engine is rebuilt by the manufacturer, how A rebuilt engine is considered to have no previous operating history and
is its operating history affected? can therefore be issued a zero-time record
What is used in an aircraft engine to help prevent 2 or more springs on each valve
valve surge or float from occurring?
What are the major components of a typical gas An air inlet, compressor section, combustion section, turbine section,
turbine engine? exhaust section and accessory section
What determines the amount of air passing through Compressor speed, forward soeed of the aircraft and air density
a turbine engine?
What are the 2 principal types of compressors Centrifugal and axial flow
currently used in turbine engines?
(Powerplant oral (2026 Edition)
How are turbine enginenrotor blades attached to Bulb-type root, fir tree-type root, or dovetail-type root
rotor disks?
Name at least 3 types of combustion chamber Can, annular, Can-annular and reverse flow annular
sections?
What is the purpose of the interconnect tubes Flame propagation during starting
attached between can-type combustion chambers?
What prevents burning of combustion chambers? Cooling air along the inside of the liner
What is a unique feature of a split (dual) 2 rotor shafts. one inside the other
compressor system?
3/30/2026, 5:30:11 PM 3/30/2026, 5:30:09 PM
What are carbon sralsbused for in turbine engines? As oil seals for the rotor shaft bearings
What are the desired effects of turbine engine Removal of contaminant deposits from interior engine surfaces, and
compressor field cleaning? improved engine performance
What is the main operating difference between The air that flows through the fan section of a turbofan engine bypasses,
turbofan and turbojet engines? or flows around the outside of the core engine instead of through it
What methods are commonly used to accomplish Fluid wash and abrasive grit blast
turbine engine compressor field cleaning?
Name an advantage of a turbofan over a turbojet? Additional thrust without increasing fuel flow
P
o
w
e
r
p
l
a
n
t
o
r (Powerplant oral (2026 Edition)
a
l
Students
also
studied
3/30/2026, 5:30:11 PM 3/30/2026, 5:30:09 PM
Terms in this set (322)
what procedure should be followed when valve Perform a cylinder compression test to identify the faulty cylinder
blow-by is indicated by a hissing sound on a
reciprocating engine when pulling the propeller
through?
What is the running valve clearance on engines Zero
equipped with hydraulic valve lifters
When troubleshooting a running engine Lack of combustion in that cylinder
malfunction. what does a cold cylinder indicate?
, What factors about the condition of an engine can The results of a compression test determine if the valves, piston rings,
be learned by studying the results of a compression and pistons are adequately sealing
test?
What should be done to repair a loose stud in an Remove the loose stud, and inspect the hole for size and the condition of
engine crankcase? the threads. It may be neccessary to use a suitable oversize stud
How is a cylinder barrel inspected for it of A Dial indicator can be used to measure at the top of the cylinder and
roundness? also at the skirt. 2 readings should be taken, 90° to each other
What types of connecting rods are commonly found Master and articulated rod assemblies
in radial engines?
What are the different types of piston rings? Compression, oil control and oil scrapper
What are the purpose of oil control rings? Oil control rings regulate the thickness of the oil film on the cylinder wall
(Powerplant oral (2026 Edition)
What types of bearings are in general use in Plain, ball and roller
reciprocating engines?
Where are cracks most likely to be found in a Highly stressed areas, the base of the pin bosses, inside at the junction
piston? of the head and walls. and the ring lands
How are piston gaps installed relative to each other Compression ring gaps should be installed in staggered positions around
on a piston, and why? the piston in order to prevent excessive blow-by
What is the purpose of valve overlap? It permits better volumetric efficiency and lowers the cylinder operating
temperature
What is the purpose of crankshaft dynamic To reduce engine vibration
dampers?
3/30/2026, 5:30:11 PM 3/30/2026, 5:30:09 PM
What is meant when it is said that an engine part is It will not likely wear to a point of causing engine failure within the next
within "serviceable limits"? time between overhaul interval
Name at least one part of an inspection that should inspect the engine mounts, crankcase, and nose section for damage
be made after a propeller strike (not sudden stop)
inspect the oil and oil screens/filters for metal particles
inspect the propeller drive shaft or crankshaft for misalignment
What are some of the precautions to be observed Disconnect the battery, chock the wheels, install a tail stand (if needed),
when preparing an aircraft for engine removal? and turn off the fuel valves
What is an indication that a primer is leaking or is The engine will not idle properly
open during engine operation?
What may be the result of incorrect installation of Excessive oil consumption
piston rings?
, What are some indications of induction system Low power and uneven running
leakage?
When an engine is rebuilt by the manufacturer, how A rebuilt engine is considered to have no previous operating history and
is its operating history affected? can therefore be issued a zero-time record
What is used in an aircraft engine to help prevent 2 or more springs on each valve
valve surge or float from occurring?
What are the major components of a typical gas An air inlet, compressor section, combustion section, turbine section,
turbine engine? exhaust section and accessory section
What determines the amount of air passing through Compressor speed, forward soeed of the aircraft and air density
a turbine engine?
What are the 2 principal types of compressors Centrifugal and axial flow
currently used in turbine engines?
(Powerplant oral (2026 Edition)
How are turbine enginenrotor blades attached to Bulb-type root, fir tree-type root, or dovetail-type root
rotor disks?
Name at least 3 types of combustion chamber Can, annular, Can-annular and reverse flow annular
sections?
What is the purpose of the interconnect tubes Flame propagation during starting
attached between can-type combustion chambers?
What prevents burning of combustion chambers? Cooling air along the inside of the liner
What is a unique feature of a split (dual) 2 rotor shafts. one inside the other
compressor system?
3/30/2026, 5:30:11 PM 3/30/2026, 5:30:09 PM
What are carbon sralsbused for in turbine engines? As oil seals for the rotor shaft bearings
What are the desired effects of turbine engine Removal of contaminant deposits from interior engine surfaces, and
compressor field cleaning? improved engine performance
What is the main operating difference between The air that flows through the fan section of a turbofan engine bypasses,
turbofan and turbojet engines? or flows around the outside of the core engine instead of through it
What methods are commonly used to accomplish Fluid wash and abrasive grit blast
turbine engine compressor field cleaning?
Name an advantage of a turbofan over a turbojet? Additional thrust without increasing fuel flow
