Questions Flashcards
What can an impeller either be?
Single or double entry
What must the combustion chamber be able to do?
Permit safe ignition of the fuel air mixture on ground and in flight
What type of engines are bleed air used on?
Ones with high mass airflow
What are the three types of turbine blades?
Impulse, impulse-reaction, reaction
What is the first main component of a turbine?
Stationary vanes called nozzle guide vanes
What are the blades on stators?
Stator vanes that guide and slow the airflow causing an increase in pressure
How is the fuel air mixture ignited?
Electrically by an igniter plug
How can fan air be discharged in fan reversers?
Through cascade vanes
Why were additives added to type 1 oils?
Increase resistance to oxidation and thermal degradation, important for long term engine cleanliness
What is the exhaust system used for in turboprop engines?
Safely guide the exhaust gases overboard
Three different types of combustion chambers?
Can, can annular, annular
What does any stress crack or deformation on the leading edge of the first stage of the compressor usually mean?
Over-temperature conditions
What does SOAP stand for?
Spectrometric Oil Analysis Program
How much does the high pressure fuel pump increase fuel pressure to?
900 psi
What is the order of oil movement from the oil tank to the oil coolers?
From the oil tank to the oil pump. Then to the pressure filter housing. Then the oil filter. Then to the air oil heat exchanger, then to the fuel cooled oil cooler
What is pour point?
The lowest temperature oil will visbly move in a 31.75mm test tube held horizontally for 5 seconds
What is flash point?
The lowest temperature that oil will give enough vapour to flash when a flame is applied
What does FADEC stand for?
Full Authority Digital Electric Control
What is the primary component of FADEC?
The EEC (Electronic Engine control) controls the operation of the engine
What is used for sealing the engine bearing chambers?
Low pressure bleed air
What is zone 2 cooled by?
Fan air from the upper part of the fan duct and is exhausted at the lower back end into the fan air stream
When is continuous ignition used?
When there is a possibility of flame out
How is the generator turned?
By the engine through the accessory gearbox
What is one of the reasons for automatic APU shutdown?
Low oil pressure
What is the drain collector assembly?
Also known as the manifold module, it keeps fluid leaks in small tanks
What is used for large commercial aircraft for fire protection?
Continuous Loop Detector System
Where is a low pressure filter installed?
Between the supply tanks and engine fuel system to protect the engine fuel pumps
What is the level of gas engine vibration?
Extremely low vibration levels so any change in level as response to an impeding failure may go unnoticed
Is it important to monitor the oil consumption of the engine?
Yes, so it should be recorded in the aircrafts technical logbook
What are the two fire detection loops?
Loop 1 and 2 (continuous loop system)
What is the APU?
Auxiliary Power Unit, small gas turbine engine (free turbine) turboshaft that provides pneumatic bleed air and electrical power for aircraft systems
What is the most common extinguishing agent?
Halon 1301
What should be used if the wash of an engine is in low temperature conditions?
Only isopropyl alcohol as anti freeze, as methanol is damaging to titanium
