Fact Sheet 1 Flashcards
thrust is felt on both static and _________ components
thrust is felt on both static and ROTATING components
if pressure increases, temperature _________ (charles law)
if pressure increases, temperature INCREASES (charles law)
temperature reduction would increase density and therefore increase ______
temperature reduction would increase density and therefore increase THRUST
in a divergent duct, pressure __________ when velocity decreases
in a divergent duct, pressure INCREASES when velocity decreases
a power plant is a _________ engine with everything connected on the aircraft
a power plant is a COMPLETE engine with everything connected on the aircraft
gas turbine engines are stopped by closing the HP ____
gas turbine engines are stopped by closing the HP COCK
free turbines have no mechanical connection to the ___________
free turbines have no mechanical connection to the COMPRESSORS
during the off, the fan speed would be ____ than the HP compressor speed
during the off, the fan speed would be LESS than the HP compressor speed
rapid movement of throttle can induce compressor _____
rapid movement of throttle can induce compressor SURGE
increase in relative humidity would ________ density and thrust
increase in relative humidity would DECREASE density and thrust
increase in intake density would ________ shaft horse power on a turbo prop
increase in intake density would INCREASE shaft horse power on a turbo prop
a large jet pipe area would ______ exhaust velocity and thrust
a large jet pipe area would LOWER exhaust velocity and thrust
to maintain thrust in a climb, EPR constant and so ___ must increase
to maintain thrust in a climb, EPR constant and so RPM must increase
subsonic engine intakes are designed to give ____ ram ratio at high speed
subsonic engine intakes are designed to give HIGH ram ratio at high speed
with an increase in altitude, a low bypass would have a ________ in thrust with an ________ in RPM
with an increase in altitude, a low bypass would have a DECREASE in thrust with an INCREASE in RPM
a bypass ratio of 5:1 would indicate that the cold stream is _ times greater than the hot stream
a bypass ratio of 5:1 would indicate that the cold stream is 5 times greater than the hot stream
pitot type intakes are divergent so maximum amount of ___ compression
pitot type intakes are divergent so maximum amount of RAM compression
ram effect will ________ pressure and thrust
ram effect will INCREASE pressure and thrust
hot air anti-icing ________ engine power output
hot air anti-icing DECREASES engine power output
compressor blade twisting is to give correct ___ from root to tip
compressor blade twisting is to give correct AOA from root to tip
airflow scheduling on axial flow altered for both __________ and ________ changes
airflow scheduling on axial flow altered for both TEMPERATURE and PRESSURE changes
VIGVs reduce possibility of compressor _____ below design RPM
VIGVs reduce possibility of compressor STALL below design RPM
ram ratio is _______ pressure compared to _____ pressure
ram ratio is AMBIENT pressure compared to INLET pressure
as engine speed increases, compressor pressure ratio _________
as engine speed increases, compressor pressure ratio INCREASES
combustion chamber swirl vanes anchor and _________ flame
combustion chamber swirl vanes anchor and STABILISE flame
can-annular combustion chambers consist of a number of flame tubes in an ________ casing
can-annular combustion chambers consist of a number of flame tubes in an ANNULAR casing
combustion in gas turbine engines ideally done at constant _________
combustion in gas turbine engines ideally done at constant PRESSURE
impulse/reaction turbines pressure _________ from root to tip with velocity ___________ from leading edge to trailing edge
impulse/reaction turbines pressure INCREASES from root to tip with velocity INCREASING from leading edge to trailing edge
fir tree roots allow blade torque and tensile load to be transmitted through to ____
fir tree roots allow blade torque and tensile load to be transmitted through to DISC
HP NGV’s are subjected to temperatures _____ their melting points and cooled by __ compressor air only
HP NGV’s are subjected to temperatures ABOVE their melting points and cooled by HP compressor air only
exhaust struts support the ____ and _________ the gas flow
exhaust struts support the CONE and STRAIGHTEN the gas flow
nozzles are chocked when gas flow is ______
nozzles are chocked when gas flow is SONIC
turbo-jet engines require noise ___________
turbo-jet engines require noise SUPPRESSION
thrust reverse deflects exhaust gas through ___ degrees
thrust reverse deflects exhaust gas through 135 degrees
full thrust reverse is approximately ____ of forward thrust
full thrust reverse is approximately HALF of forward thrust
thrust reverse on fan engines reverses ____ stream only
thrust reverse on fan engines reverses COLD stream only
bearing chamber pressure ________ pressure jet delivery
bearing chamber pressure OPPOSES pressure jet delivery
typical carbon seal located by _______ and fitted to _____ mounted collar
typical carbon seal located by SPRINGS and fitted to SHAFT mounted collar
straight roller bearing normally used for carrying ______ loads in gas turbine engines
straight roller bearing normally used for carrying RADIAL loads in gas turbine engines
high oil temperature can lead to ___________
high oil temperature can lead to OXIDATION
a gallon of fuel with an SG of 0.8 would weight _lbs
a gallon of fuel with an SG of 0.8 would weight 8lbs
FSII prevents the ______ in fuel freezing
FSII prevents the WATER in fuel freezing
oil flow in ________ ______ system controlled by limiting pressure in feed line
oil flow in PRESSURE RELIEF system controlled by limiting pressure in feed line
full flow oil system has no ______ valve or filter __ ____
full flow oil system has no RELIEF valve or filter BY PASS
engine oil pumps are normally ____ gear types
engine oil pumps are normally SPUR gear types
squeezed film oil bearings used in engines to reduce __________
squeezed film oil bearings used in engines to reduce VIBRATION
FADEC receives ___ data since thrust varies with mass flow, which varies with altitude and speed
FADEC receives AIR data since thrust varies with mass flow, which varies with altitude and speed
on large aircraft, both FADEC are operating; one in control, the other receiving data but with command drivers _________
on large aircraft, both FADEC are operating; one in control, the other receiving data but with command drivers DISABLED
on turbo-jet, as forward speed increases, SFC _________
on turbo-jet, as forward speed increases, SFC INCREASES
in a barometric pressure control; a decrease in P1 will ________ servo pressure and pump stroke
in a barometric pressure control; a decrease in P1 will DECREASE servo pressure and pump stroke
control of fuel supply during rapid acceleration prevents high ___ ____ temperature and possible _____
control of fuel supply during rapid acceleration prevents high JET PIPE temperature and possible SURGE
FADEC has speed inputs from fan and turbine to detect fan shaft _______
FADEC has speed inputs from fan and turbine to detect fan shaft FAILURE
ice formation in fuel reduced by using an ____
ice formation in fuel reduced by using an FCOC
air starter motors have an _______ turbine
air starter motors have an IMPULSE turbine
during ground operation, generators would be cooled by an _______ flow of atmospheric air
during ground operation, generators would be cooled by an INDUCED flow of atmospheric air
LP cooling air outlet ___________ switch indicates engine overheat
LP cooling air outlet THERMOSTATIC switch indicates engine overheat
fire prevented from spreading to cool zone by __________ pressure
fire prevented from spreading to cool zone by DIFFERENTIAL pressure
air is bled by bleed valve to prevent _______ rear stages of the compressor
air is bled by bleed valve to prevent CHOKING rear stages of the compressor
air starter ducts are normally _____ bore aluminium
air starter ducts are normally LARGE bore aluminium
discharge resistors allow capacitors to discharge when HEIU is switched ___
discharge resistors allow capacitors to discharge when HEIU is switched OFF
ballast resistors in engine temp system are fitted in _______ to give same reading for all engines
ballast resistors in engine temp system are fitted in PARALLEL to give same reading for all engines
flight deck indicator for TGT indication uses _____________ which need an electrical supply
flight deck indicator for TGT indication uses THERMOCOUPLES which need an electrical supply
EGT indicator is used to monitor the _________ of the turbine and engine in general
EGT indicator is used to monitor the INTEGRITY of the turbine and engine in general
______ wheels operate on the principal of inductive reactance
PHONIC wheels operate on the principal of inductive reactance
torque is the __________ to rotation
torque is the RESISTANCE to rotation
_________ is used in water injection systems to increase the engine RPM/power
METHANOL is used in water injection systems to increase the engine RPM/power
nozzle will increase in size when reheat selected to reduce ____ ________ in the exhaust and so preventing surge
nozzle will increase in size when reheat selected to reduce BACK PRESSURE in the exhaust and so preventing surge
engine output will ________ on a turbo prop as aircraft increases
engine output will INCREASE on a turbo prop as aircraft increases
jet thrust in a turboprop engine is approximately __%
jet thrust in a turboprop engine is approximately 10%
_________ devices on turboprop prevent propeller failure
OVERSPEED devices on turboprop prevent propeller failure
___________ power in turbo shaft engines is shaft power plus thrust
EQUIVALENT power in turbo shaft engines is shaft power plus thrust
a free turbine will rotate ______ than the gas generator
a free turbine will rotate SLOWER than the gas generator
APU fuel supply is taken from the ____ aircraft fuel tanks
APU fuel supply is taken from the MAIN aircraft fuel tanks
APU switches operate at 3, 9 and 11_%
APU switches operate at 35, 95 and 110%
engine mountings allow for radial and axial __________
engine mountings allow for radial and axial EXPANSION
engine pods are _______ in order to stop the building up of flammable vapours and for engine cooling
engine pods are VENTED in order to stop the building up of flammable vapours and for engine cooling
primary fuel stop fitted to engine ___
primary fuel stop fitted to engine FCU
short circuits in __________ type fire wire do not five a false warning
short circuits in CAPACITANCE type fire wire do not five a false warning
main fire extinguishers operated manually from ______ ____ only
main fire extinguishers operated manually from FLIGHT DECK only
halogenic fire extinguishers are severely corrosive to __________
halogenic fire extinguishers are severely corrosive to TITANIUM
before starting an engine, instruments should show indications _________ with existing conditions
before starting an engine, instruments should show indications EXISTING with existing conditions
____ will alert engineers of an impending failure
AIDS will alert engineers of an impending failure
a _____ vibration sensor could cause a spurious vibration indication
a LOOSE vibration sensor could cause a spurious vibration indication
turbine rotor blades suffer ______ rupture
turbine rotor blades suffer STRESS rupture
humidity indicator in MVP bag is ____ if still satisfactory
humidity indicator in MVP bag is BLUE if still satisfactory
sponginess in MVP bag material by fuel or oil contamination may be limited by washing with ______
sponginess in MVP bag material by fuel or oil contamination may be limited by washing with WATER
