Book 3 - Engine Air Systems Flashcards
HP __________ air is used to cool other engine components
HP COMPRESSOR air is used to cool other engine components
a cooling air temperature monitoring warning indicator will be provided to indicate engine trouble. the signal is obtained from the LP _______ air outlet duct
a cooling air temperature monitoring warning indicator will be provided to indicate engine trouble. the signal is obtained from the LP COOLING air outlet duct
an important function of the cooling air is to ______ any flammable vapours from the engine compartment
an important function of the cooling air is to PURGE any flammable vapours from the engine compartment
a fireproof _________ is provided to separate the cool area or zone of the engine which contains fuel, oil, hydraulic and electrical systems, from the hot areas surrounding the turbine, combustion chamber and exhaust. differential ________ can be created in the two zones by calibration of the inlet and outlet ducts to prevent the spread of fire from the hot zone
a fireproof BULKHEAD is provided to separate the cool area or zone of the engine which contains fuel, oil, hydraulic and electrical systems, from the hot areas surrounding the turbine, combustion chamber and exhaust. differential PRESSURES can be created in the two zones by calibration of the inlet and outlet ducts to prevent the spread of fire from the hot zone
the engine compartment is normally divided into three ones.
zone 1 is the forward zone and surrounds the hydraulic pumps, engine rubricating oil reservoir, fuel control unit and gearbox etc. this zone is the most ______ area for a fire to start and is fitted with fire ________ and remotely operated fire __________. to reduce the chance of a fire spreading, this zone is kept at a lower _________ than the other zones
zone 2 is where the compressor blades may touch the engine casing and create a ______ fire, indicated via the engine vibration/health trend monitoring system. this zone is hotter than zone 1
zone 3 is the ________ zone as it surrounds the engine and jet behind the combustion chambers. a fireproof bulkhead separates it from zone 1
all zones are ventilated in flight using ram air through inlets on the cowlings. on the ground with the engines running, ventilation of engine zones is achieved by inducers linked to the engine air system which draws air into the zones using a ________-type induction
the engine compartment is normally divided into three ones.
zone 1 is the forward zone and surrounds the hydraulic pumps, engine rubricating oil reservoir, fuel control unit and gearbox etc. this zone is the most LIKELY area for a fire to start and is fitted with fire DETECTION and remotely operated fire EXTINGUISHERS. to reduce the chance of a fire spreading, this zone is kept at a lower PRESSURE than the other zones
zone 2 is where the compressor blades may touch the engine casing and create a METAL fire, indicated via the engine vibration/health trend monitoring system. this zone is hotter than zone 1
zone 3 is the HOTTEST zone as it surrounds the engine and jet behind the combustion chambers. a fireproof bulkhead separates it from zone 1
all zones are ventilated in flight using ram air through inlets on the cowlings. on the ground with the engines running, ventilation of engine zones is achieved by inducers linked to the engine air system which draws air into the zones using a VENTURI-type induction
engine drains either direct fluids _________ or into a drain _____ to ensure they cannot re-enter the engine and create a fire hazard
the drain tank, which has its own vent pipe is then emptied by an ejector nozzle or outlet tube adjacent to the exhaust system final ________
___ drains can be used for fault diagnosis
engine drains either direct fluids OVERBOARD or into a drain TANK to ensure they cannot re-enter the engine and create a fire hazard
the drain tank, which has its own vent pipe is then emptied by an ejector nozzle or outlet tube adjacent to the exhaust system final NOZZLE
DRY drains can be used for fault diagnosis
