Basic CF6


Fuel system.


1.How is thrust output measured?-By N1-Fan speed


2.Can N1 be directly controlled by pilot?-Can't N2 only and N2 is coupled to N1 by aerodynamic couple.


3.How is N2 controlled?-By power lever


4.What does the power lever varies to control fuel flow?-Tension of speeder spring


5.When temperature is increase what will happen to N1?-N1 will increase because N1 is varies with temperature


6.Fuel system is controlled from cockpit by what?-Power lever(throttle)


7.What are the 3 levels of idle?-Ground idle, Flight idle and Min idle


8.What is ground idle?-sufficient thrust for taxiing


9.What is flight idle?-Engine accelaration from idle to take off within 8 sec (FAA)


10.What will happen to Ground idle and FLight idle during hot day?-Increase


11.Throttle lever must be moved forward extra on cold or hot day?-hot day


12.What is the purpose of throtlle interlock?-to allow thrust reverser time move to 90% deploy


13.How to varify faulty Mec or CIT sensor?-both G.I and F.I failed if one fail mec fault


14.What is emergency fuel limitations?-at 20000ft, 24 degrees centigrade 3 hours continue and 4 hours cumulative


15.What are the types of fuel nozzles?-Dual/secondary flow special and secondary nozzle


16.Identification of fuel nozzle?-White aluminium(primary), green(secondary), blue(special)


17.odd no ports for what nozzle?-primary/dual flow nozzle


18.even no ports for what nozzle?-secondary nozzle


19.port no 12 is for what nozzle?-special nozzle


20.What air is used to cool nozzle tip?-CDP air


21.What are the inputs for MEC?-PLA, CIT, CDP, N2


22.What are the adjustments available on MEC?-G.I F.I specific gravity VSV and VBV


23.What are the pilot's input into MEC?PLA and HPC


24.What is the GI/FI schedule for-to know aircraft on ground or not and to....


25.When squat switch is energized, it indicates ground or flight idle?-Ground idle


26.Acceleration limit schedule is for-


27.What are the inputs for accel decel limits?-CDP, CIT and N2


28.What are the functions of the MFP?-


29.MFP is attached to?-to AGB by QAD ring


30.Why must the boost pump be 'on' during dry motoring?-to provide lubrication / positive fuel pressure


31.How many stages of MFP?-2 stages


32.What types of pump?-impeller/centrifugal/boost pumps and gear type displacement


33.Where is fuel pressure tapped?-Pump interstage


34.Is there a bypass indication on debris screen?-No


35.Eductors are only effective on wing or tail engine?-Only on wing


36.Location of heat exchanger with reference to MFP?-to the left of MFP


37.Does the fuel line in heat exchanger have a bypass?-No only oil


38.Location of fuel filter with regards to MFP?-to the right of MFP


39.Is the filter element reusable?-yes


40.What switch is tapped across the filter?-differential pressure switch


41.What is the switch for?-


42.What must be done before servicing the filter?-shutt off LP cock


43.Location of P&D valve w.r.t to MEC?-on MEC outlet


44.Functions of P&D valve?-Drain fuel manifold at shutdown


45.Ports on P&D valve?-


46.Fuel manifold is shrouded to prevent what?-


47.Identification band is provided at which connectors?-


48.Where are CIT sensor mounted?-on fan frame at 5&6 o clock


49.What gas is used in CIT?-Helium


50.CIT sensor moves 3D cam in what direction?-Aerial


51.What is the malfunctions on CIT?-Hot shift and Cold shift.


52.CIT is cooled by what?-Air


53.What happens if cam is moved too extreme?-MEC used standard day temperature.


1 comments:

Anonymous said...

could you give the answers

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