FAA Powerplant Oral & Practical
Question
A equipment-type pump is classified in what class? - ANS-Constant displacement
Are thrust reversers generally capable of produce a maximum reverse thrust approximately
equal to an engines full ahead thrust? - ANS-No. An engines full reverse thrust is normally
significantly less than its full forward thrust.
Are turbine engine spark igniters typically
vulnerable to carbon fouling? Explain. - ANS-No, due to the fact the high-power sparks they
produce easy off any deposits that form on the firing end.
At what pace does a fuel turbine APU function? - ANS-An APU operates at or close to its
rated speed irrespective of the electric or pneumatic loads imposed.
Bellmouth inlet ducts are used usually on what kind aircraft? - ANS-Helicopters.
Between area and armature windings in starter-
mills, which usually acquire modern for
operation in the begin mode? - ANS-Generally, each the sphere and the armature
get hold of modern-day for operation in the start
mode.
Depending on the unique engine, trimming is
achieved in line with considered one of two styles of
(engine) indication; what are they? - ANS-(1) EPR; (2) RPM
Describe the precept of operation of a Kidde
continuous loop hearth safety machine? - ANS-Two wires are imbedded in a special ceramic
center inside an Inconel tube. One wire is a
floor and the second twine is a warm lead that
affords a cutting-edge while the ceramic core
cloth adjustments its resistance because of temperature.
From where does an externally driven
supercharger derive its strength? - ANS-From the electricity of engine exhaust gases
directed against some shape of turbine.
How and at what point does an internally pushed
supercharger increase air strain? - ANS-An impeller compresses the fuel/air aggregate
after it leaves the carburetor.
,How are exhaust device internal baffles or diffusers inspected? - ANS-The exhaust device is
disassembled as necessary for visual inspection.
How are high temperature noxious gases eliminated
and disposed of in an working reciprocating engine? - ANS-By the engine exhaust machine.
How are piston ring gaps installed relative to every different on a piston, and why? -
ANS-Compression ring gaps have to be installed in staggered positions (not aligned) across
the piston on the way to save you immoderate blow-through.
How are turbine engine rotor blades connected to rotor disks? (Name at least strategies.) -
ANS-By a: (1) bulb-type root, (2) fir tree-kind root, or (3) dovetail-kind root.
How can a turbine engine EGT device be checked
with out going for walks the engine? - ANS-By checking the resistance of thermocouples
and circuits.
How can failure of exhaust machine internal baffles or diffusers purpose a loss of engine
energy? - ANS-By proscribing the waft of exhaust gases.
How do you determine the reparability of a
broken propeller blade? - ANS-By connection with the producer's
preservation guide.
How does a divergent formed jet engine inlet have an effect on the air flowing to the engine
when an plane is in subsonic flight? - ANS-It causes the air speed to decrease and the
air stress to increase.
How does a voltage regulator control the voltage
of an alternator? - ANS-By regulating the voltage output of the d.C.
Exciter.
How does an oil evaluation application help to
compare the internal circumstance of an engine ? - ANS-By figuring out each wear metal
and the
quantity gift inside the oil.
How is a cylinder barrel inspected for out of roundness? - ANS-A cylinder bore guage ( or a
telescopic gauge and micrometer, or an inside micrometer ) can be used to degree on the
pinnacle of the cylinder and additionally at the skirt . Two readings have to be taken , ninety°
to every different.
How is a closely loaded APU, drawing near its
most exhaust gas temperature (EGT),
prevented from overheating? - ANS-By the usage of a load control valve that
modulates the pneumatic load to hold a
safe working temperature.
, How is an APUs working pace maintained
regardless of variations inside the hundreds imposed? - ANS-By the APUs gas manipulate
automatically
adjusting the gas go with the flow.
How is an HRD fireplace extinguisher agent allotted? - ANS-Open stop tubes.
How is compressor bleed air used to efficaciously
allow better fuel temperatures inside the turbine
phase of a few engines? - ANS-Bleed air from the compressor is ducted
thru hole turbine segment inlet guide
vanes and hole first level rotor blades,
maintaining them cool enough to prevent heat damage.
How is feathering achieved on a consistent
velocity propeller? - ANS-Releasing the governor oil stress allows
the counterweights and feathering spring to
feather the propeller.
How is the cool-down for plenty APUs
achieved previous to shutdown? - ANS-By going for walks the APU for a detailed minimal
period of time after last the bleed air valve (unloaded).
How is turbine engine EGT acquired? - ANS-Usually by means of several thermocouples
spaced at
periods around the exhaust duct perimeter
close to the turbine go out.
How long does it take to discharge an HRD agent? - ANS-One to 2 seconds.
How long is an average APU cool-down period? - ANS-Three minutes.
How many levels are used in most aircraft a.C.
Alternator systems? - ANS-Three.
How may additionally an engine be visually diagnosed ? - ANS-By the engine records plate.
How ought to aluminum propeller blades and
hubs be wiped clean? - ANS-The propeller ought to be cleaned in
accordance with the manufacturer's pointers.
In a reciprocating engine, what problem is prompted
by way of a very wealthy aggregate at idle? - ANS-Spark plug fouling.
In terms of the engine crankshaft function, whilst
does the ignition event occur? - ANS-A targeted wide variety of crankshaft degrees
earlier than pinnacle lifeless center on the compression stroke.
Question
A equipment-type pump is classified in what class? - ANS-Constant displacement
Are thrust reversers generally capable of produce a maximum reverse thrust approximately
equal to an engines full ahead thrust? - ANS-No. An engines full reverse thrust is normally
significantly less than its full forward thrust.
Are turbine engine spark igniters typically
vulnerable to carbon fouling? Explain. - ANS-No, due to the fact the high-power sparks they
produce easy off any deposits that form on the firing end.
At what pace does a fuel turbine APU function? - ANS-An APU operates at or close to its
rated speed irrespective of the electric or pneumatic loads imposed.
Bellmouth inlet ducts are used usually on what kind aircraft? - ANS-Helicopters.
Between area and armature windings in starter-
mills, which usually acquire modern for
operation in the begin mode? - ANS-Generally, each the sphere and the armature
get hold of modern-day for operation in the start
mode.
Depending on the unique engine, trimming is
achieved in line with considered one of two styles of
(engine) indication; what are they? - ANS-(1) EPR; (2) RPM
Describe the precept of operation of a Kidde
continuous loop hearth safety machine? - ANS-Two wires are imbedded in a special ceramic
center inside an Inconel tube. One wire is a
floor and the second twine is a warm lead that
affords a cutting-edge while the ceramic core
cloth adjustments its resistance because of temperature.
From where does an externally driven
supercharger derive its strength? - ANS-From the electricity of engine exhaust gases
directed against some shape of turbine.
How and at what point does an internally pushed
supercharger increase air strain? - ANS-An impeller compresses the fuel/air aggregate
after it leaves the carburetor.
,How are exhaust device internal baffles or diffusers inspected? - ANS-The exhaust device is
disassembled as necessary for visual inspection.
How are high temperature noxious gases eliminated
and disposed of in an working reciprocating engine? - ANS-By the engine exhaust machine.
How are piston ring gaps installed relative to every different on a piston, and why? -
ANS-Compression ring gaps have to be installed in staggered positions (not aligned) across
the piston on the way to save you immoderate blow-through.
How are turbine engine rotor blades connected to rotor disks? (Name at least strategies.) -
ANS-By a: (1) bulb-type root, (2) fir tree-kind root, or (3) dovetail-kind root.
How can a turbine engine EGT device be checked
with out going for walks the engine? - ANS-By checking the resistance of thermocouples
and circuits.
How can failure of exhaust machine internal baffles or diffusers purpose a loss of engine
energy? - ANS-By proscribing the waft of exhaust gases.
How do you determine the reparability of a
broken propeller blade? - ANS-By connection with the producer's
preservation guide.
How does a divergent formed jet engine inlet have an effect on the air flowing to the engine
when an plane is in subsonic flight? - ANS-It causes the air speed to decrease and the
air stress to increase.
How does a voltage regulator control the voltage
of an alternator? - ANS-By regulating the voltage output of the d.C.
Exciter.
How does an oil evaluation application help to
compare the internal circumstance of an engine ? - ANS-By figuring out each wear metal
and the
quantity gift inside the oil.
How is a cylinder barrel inspected for out of roundness? - ANS-A cylinder bore guage ( or a
telescopic gauge and micrometer, or an inside micrometer ) can be used to degree on the
pinnacle of the cylinder and additionally at the skirt . Two readings have to be taken , ninety°
to every different.
How is a closely loaded APU, drawing near its
most exhaust gas temperature (EGT),
prevented from overheating? - ANS-By the usage of a load control valve that
modulates the pneumatic load to hold a
safe working temperature.
, How is an APUs working pace maintained
regardless of variations inside the hundreds imposed? - ANS-By the APUs gas manipulate
automatically
adjusting the gas go with the flow.
How is an HRD fireplace extinguisher agent allotted? - ANS-Open stop tubes.
How is compressor bleed air used to efficaciously
allow better fuel temperatures inside the turbine
phase of a few engines? - ANS-Bleed air from the compressor is ducted
thru hole turbine segment inlet guide
vanes and hole first level rotor blades,
maintaining them cool enough to prevent heat damage.
How is feathering achieved on a consistent
velocity propeller? - ANS-Releasing the governor oil stress allows
the counterweights and feathering spring to
feather the propeller.
How is the cool-down for plenty APUs
achieved previous to shutdown? - ANS-By going for walks the APU for a detailed minimal
period of time after last the bleed air valve (unloaded).
How is turbine engine EGT acquired? - ANS-Usually by means of several thermocouples
spaced at
periods around the exhaust duct perimeter
close to the turbine go out.
How long does it take to discharge an HRD agent? - ANS-One to 2 seconds.
How long is an average APU cool-down period? - ANS-Three minutes.
How many levels are used in most aircraft a.C.
Alternator systems? - ANS-Three.
How may additionally an engine be visually diagnosed ? - ANS-By the engine records plate.
How ought to aluminum propeller blades and
hubs be wiped clean? - ANS-The propeller ought to be cleaned in
accordance with the manufacturer's pointers.
In a reciprocating engine, what problem is prompted
by way of a very wealthy aggregate at idle? - ANS-Spark plug fouling.
In terms of the engine crankshaft function, whilst
does the ignition event occur? - ANS-A targeted wide variety of crankshaft degrees
earlier than pinnacle lifeless center on the compression stroke.
