Fact Sheet 2 Flashcards
internal operating principle of GTE’s is newtons _____ law of motion
internal operating principle of GTE’s is newtons THIRD law of motion
principle of air passing through engine operates on newtons _____ law of motion
principle of air passing through engine operates on newtons FIRST law of motion
brayton cycle plots ________ against _______
brayton cycle plots PRESSURE against VOLUME
GTE’s operate on the _______ cycle
GTE’s operate on the BRAYTON cycle
gas flow in exhaust will accelerate until nozzle becomes _______
gas flow in exhaust will accelerate until nozzle becomes CHOKED
the speed of gas in a choked propelling nozzle is ______
the speed of gas in a choked propelling nozzle is SONIC
a choked nozzle produces thrust which is a proportion of ______ thrust
a choked nozzle produces thrust which is a proportion of GROSS thrust
power is the rate of ____ in regards to time
power is the rate of WORK in regards to time
in a reverse flow engine, air is reversed before the turbine to reduce engine ____
in a reverse flow engine, air is reversed before the turbine to reduce engine SIZE
centrifugal compressor diffuser converts _______ energy into pressure
centrifugal compressor diffuser converts KINETIC energy into pressure
compressor stall can be recognised by _________ along with rapid rise in ___
compressor stall can be recognised by VIBRATION along with rapid rise in EGT
a diffuser is _________
a diffuser is DIVERGENT
the largest change in pressure occurs in the ___________ of a turbo jet
the largest change in pressure occurs in the COMPRESSOR of a turbo jet
engine compressor stall may be induced during rapid movement of aircraft with engines mounted close to the _________
engine compressor stall may be induced during rapid movement of aircraft with engines mounted close to the FUSELAGE
banging in the intake and a rapid rise in EGT can identify a compressor _____
banging in the intake and a rapid rise in EGT can identify a compressor SURGE
combustion chamber inlet pressure _____ with increases RPM
combustion chamber inlet pressure RISES with increases RPM
a combustion chamber is usually cooled by HP core air on the _______ and outside surfaces
a combustion chamber is usually cooled by HP core air on the INSIDE and outside surfaces
approximately only __% of air in the combustion chamber is used for combustion
approximately only 40% of air in the combustion chamber is used for combustion
airflow in the combustion chamber split between 40% ___________ and 60% _______
airflow in the combustion chamber split between 40% COMBUSTION and 60% COOLING
HP core air is used to ____ the combustion chamber
HP core air is used to COOL the combustion chamber
impulse/reaction turbines are designed with impulse section at ____ and _______ edges
impulse/reaction turbines are designed with impulse section at ROOT and LEADING edges
NGV’s are cooled by HP compressor ________ air at comp delivery temperature
NGV’s are cooled by HP compressor DELIVERY air at comp delivery temperature
the exhaust cone forms a _________ duct which decreases gas velocity
the exhaust cone forms a DIVERGENT duct which decreases gas velocity
the duct made by the exhaust cone and outer skin _________ gas pressure and _________ gas velocity
the duct made by the exhaust cone and outer skin INCREASES gas pressure and DECREASES gas velocity
jet noise is influenced most by the ___________ of the exit gases
jet noise is influenced most by the TEMPERATURE of the exit gases
the noise emitted by a propelling nozzle is influenced by the __________ of exit gases with the nozzle ______
the noise emitted by a propelling nozzle is influenced by the TEMPERATURE of exit gases with the nozzle CHOKED
thrust ________ may be selected at landing speeds, WOW and idle engine power settings
thrust REVERSE may be selected at landing speeds, WOW and idle engine power settings
hot stream thrust reverser of the clamshell door type uses HP ___ to deploy and stow the doors
hot stream thrust reverser of the clamshell door type uses HP AIR to deploy and stow the doors
on high bypass engines with common exhaust, only ____ stream is reversed
on high bypass engines with common exhaust, only COLD stream is reversed
on high bypass engines thrust reverse used ____ stream only
on high bypass engines thrust reverse used COLD stream only
thrust reverse system empty safety devices to make an inadvertent _________ unlikely
thrust reverse system empty safety devices to make an inadvertent _________ unlikely
thrust reverse on a turbo prop is achieved by moving propeller to a ________ angle
thrust reverse on a turbo prop is achieved by moving propeller to a NEGATIVE angle
a high bypass nose cowl will have ____-icing equipment, _______ lining and ______ intake turbulence
a high bypass nose cowl will have ANTI-icing equipment, ACOUSTIC lining and REDUCE intake turbulence
a pitot-type intake is ____ affected by changes in aircraft attitude
a pitot-type intake is LESS affected by changes in aircraft attitude
a variable ______ intake is required to accommodate changing volumes of air at changing speed
a variable THROAT intake is required to accommodate changing volumes of air at changing speed
freezing temperature of jet A1 is -__ celsius
freezing temperature of jet A1 is -47 celsius
the additive FSII is added to fuel as an ___ inhibitor
the additive FSII is added to fuel as an ICE inhibitor
FSII is used to prevent _____
FSII is used to prevent ICING
specific fuel consumption is an indication of overall engine _________
specific fuel consumption is an indication of overall engine EFFICIENCY
SG of jet A1 is approximately 0.__
SG of jet A1 is approximately 0.81
the SG of a fuel is _______ with temperature
the SG of a fuel is VARIABLE with temperature
spur gear scavenge pumps have greater _______ than pressure pumps due to longer teeth
spur gear scavenge pumps have greater CAPACITY than pressure pumps due to longer teeth
last chance filters are fitted between pressure ______ and oil ____
last chance filters are fitted between pressure FILTERS and oil JETS
the engine oil reservoir is vented through the gearbox and _________ breather
the engine oil reservoir is vented through the gearbox and CENTRIFUGAL breather
MCD’s are fitted in the _______ side of oil system
MCD’s are fitted in the SCAVENGE side of oil system
capacity of scavenge pump is ______ than pressure pump
capacity of scavenge pump is HIGHER than pressure pump
in a gas coupled turbo prop, the propeller is driven from the ______ turbine
in a gas coupled turbo prop, the propeller is driven from the POWER turbine
free turbine of turbo-prop drives _________
free turbine of turbo-prop drives PROPELLER
overspeed devices on a turbo prop prevent propeller ________
overspeed devices on a turbo prop prevent propeller FAILURE
the throttle via the FCU controls the ______ of the gas generator in a turbo shaft engine
the throttle via the FCU controls the SPEED of the gas generator in a turbo shaft engine
the energy left in the exhaust of a turbo prop engine is ____ than a turbo jet but is still used to produce thrust
the energy left in the exhaust of a turbo prop engine is LESS than a turbo jet but is still used to produce thrust
exhaust of a turbo prop is directed to produce extra ______
exhaust of a turbo prop is directed to produce extra THRUST
free turbine engine turbo props are normally started with the propeller in the _______ position
free turbine engine turbo props are normally started with the propeller in the FEATHER position
in a turbo shaft engine, only the ___ stream connects the free turbine to the rest of the engine
in a turbo shaft engine, only the gas stream connects the free turbine to the rest of the engine
________ power if turbo shaft = SHP + net jet thrust
EQUIVALENT power if turbo shaft = SHP + net jet thrust
in a free power turbine, the power turbine rotates _______ than the gas generator
in a free power turbine, the power turbine rotates SLOWER than the gas generator
free turbine overspeed system on turbo shaft engine will _______ auto shut down of a surviving engine
free turbine overspeed system on turbo shaft engine will INHIBIT auto shut down of a surviving engine
_______ ratio of fan engine is the ratio between fan and core engine
BYPASS ratio of fan engine is the ratio between fan and core engine
operation of an engine at fixed take off RPM would mean _____ thrust when humidity is high
operation of an engine at fixed take off RPM would mean LOWER thrust when humidity is high
on a hot day, airflow scheduling on an axial flow compressor will automatically adjust to a ______ RPM range
on a hot day, airflow scheduling on an axial flow compressor will automatically adjust to a HIGHER RPM range
in take-off, EPR is maintained to altitude, N1 would be _____ but thrust would be ____
in take-off, EPR is maintained to altitude, N1 would be HIGHER but thrust would be LESS
cooling of accessory equipment in the air is by ducted _________ air
cooling of accessory equipment in the air is by ducted ATMOSPHERIC air
engine LP cooling air outlet _________ gives indication of mechanical failure within an engine
engine LP cooling air outlet TEMPERATURE gives indication of mechanical failure within an engine
engine anti-icing is selected ________ from the cockpit and _______ engine thrust
engine anti-icing is selected MANUALLY from the cockpit and REDUCES engine thrust
anti-icing on take-off will ________ available thrust
anti-icing on take-off will REDUCE available thrust
accessory units such as generators are cooled on the ground by _______ atmospheric air
accessory units such as generators are cooled on the ground by INDUCED atmospheric air
engine air off takes are controlled by _________ operated ______ gate valves
engine air off takes are controlled by ELECTRICALLY operated CARBON gate valves
air gap igniters use a _______ voltage than surface discharge plugs
air gap igniters use a HIGHER voltage than surface discharge plugs
start circuit cancelled after reached self-_________ speed
start circuit cancelled after reached self-SUSTAINING speed
on a normal start, starter will shut down by closing ___ _____ valve, selected closed by switch within starter
on a normal start, starter will shut down by closing AIR START valve, selected closed by switch within starter
the term _____ start means the engine lights up but fails to accelerate
the term HUNG start means the engine lights up but fails to accelerate
on a hung start the engine ignites but fails to __________
on a hung start the engine ignites but fails to ACCELERATE
after a normal engine start, the air starter is disengaged from the engine by _____ clutch
after a normal engine start, the air starter is disengaged from the engine by SPRAG clutch
water injection injects water directly into the ________ chamber in the direction of flow
water injection injects water directly into the COMBUSTION chamber in the direction of flow
water methanol mixture injected into the engine acts as a ________ and fuel
water methanol mixture injected into the engine acts as a COOLANT and fuel
when reheat is selected mass flow through the engine stays the _____
when reheat is selected mass flow through the engine stays the SAME
an APU on the ground would supply ___ for engine starting
an APU on the ground would supply AIR for engine starting
a single shafted APU running at altitude will produce ________ power only
a single shafted APU running at altitude will produce ELECTRICAL power only
during speed on condition, the APU FCU will have only ___ spill valve open
during speed on condition, the APU FCU will have only ONE spill valve open
APU surge bleed valve, on the ground, will be de-energised ______ regardless of APU bleed valve position
APU surge bleed valve, on the ground, will be de-energised CLOSED regardless of APU bleed valve position
an APU is automatically shut down if the oil pressure in the supply line falls below __ psi
an APU is automatically shut down if the oil pressure in the supply line falls below 45 psi
in normal APU operations, the immersion thermocouple will cause the APU bleed valve to de-energise, closed, if an over-__________ occurs
in normal APU operations, the immersion thermocouple will cause the APU bleed valve to de-energise, closed, if an over-TEMPERATURE occurs
engine mountings allow axial and radial expansion due to __________
engine mountings allow axial and radial expansion due to TEMPERATURE
rolling elements in main shaft bearings are constructed from _____ alloys
rolling elements in main shaft bearings are constructed from STEEL alloys
bore testing of flexible hoses requires that the ball is __% of diameter
bore testing of flexible hoses requires that the ball is 90% of diameter
after manufacture, fuel lines are pressure tested to 1._ times working pressure
after manufacture, fuel lines are pressure tested to 1.5 times working pressure
_______ couplings used in air and vapour lines only
SLIDING couplings used in air and vapour lines only
engine _____ rates are given for stationary and running conditions
engine DRAIN rates are given for stationary and running conditions
fire extinguishers are operated ________ from the flight deck
fire extinguishers are operated MANUALLY from the flight deck
continuous loop fire wire produces an _____ return circuit when fire occurs
continuous loop fire wire produces an EARTH return circuit when fire occurs
firewall bulkheads are fitted between the hot and cold _____
firewall bulkheads are fitted between the hot and cold ZONES
alarm contacts in a pneumatic fire detector are ________ operated and normally ____
alarm contacts in a pneumatic fire detector are DIAPHRAGM operated and normally OPEN
engine mounting allow for axial and radial _________
engine mounting allow for axial and radial EXPANSION
engine fire extinguishers will discharge into more than one engine only if selected. fire extinguishers usually use halon ____
engine fire extinguishers will discharge into more than one engine only if selected. fire extinguishers usually use halon 1211
a bursting disc that is ________ sensitive protects a fire extinguisher
a bursting disc that is PRESSURE sensitive protects a fire extinguisher
pneumatic type detectors will give ____ fire and overheat warnings
pneumatic type detectors will give BOTH fire and overheat warnings
SOAP analysis produce a _____ showing the results of many samples
SOAP analysis produce a GRAPH showing the results of many samples
desalination washing of components done separately, _________ washed first
desalination washing of components done separately, COMPRESSOR washed first
shingling of fan blades with no other damage; blades can be un-_______ and engine continue in service back to base after company checks
shingling of fan blades with no other damage; blades can be un-SHINGLED and engine continue in service back to base after company checks
if humidity indicator found unsafe after short period, MVP bag needs ______, new _________ fitted and new indicator
if humidity indicator found unsafe after short period, MVP bag needs REPAIR, new DESICCANT fitted and new indicator
