Gas Turbine Pre/Post-PT Flashcards
Match the statements and answers
When starting an engine in flight
Select one:
1.It may be possible to windmill start if the airspeed is low enough
2.It may be possible to windmill start the engine if the airspeed is high enough
3.The engine starter motor is always required
4.The starter motor is never used
2.It may be possible to windmill start the engine if the airspeed is high enough
During the cruise, the autothrottle is set to maintain airspeed. Which of the following would cause the EGT, N2 and FF to rise but N1 to remain constant.
Select one:
1.Selecting a higher cabin altitude from 5000 to 8000 feet
2.Flying into colder air
3.Selecting a lower airspeed.
4.Opening the Main Bleed valve for Air Conditioning.
4.Opening the Main Bleed valve for Air Conditioning.
In a piston engine the 4 stroke cycle is called the Otto Cycle. What is the induction, compression, combustion and exhaust process in the gas turbine engine called?
Select one:
1.Brayton
2.Raygun
3.Sorgum
4.Numbum
1.Brayton
If the total air inflow into a Turbo fan engine was 1500kg/s and the HP compressor was receiving 300kg/s what would the Bypass Ratio be?
Select one:
1)5:1
2)12:1
3)2:1
4)4:1
4)4:1
Under what conditions would you select continuous ignition
Select one or more:
1.Turbulence
2.Cold air
3.Contaminated Runways
4.Wing Icing
5.Heavy precipitation
6.Crosswind take-offs
1.Turbulence
3.Contaminated Runways
5.Heavy precipitation
6.Crosswind take-offs
During starting the FADEC uses the aircraft power supply. Where does it get its power from when the aircraft engine is running at idle.
Select one:
1.From the aircraft battery
2.From the Emergency Cricetinae
3.It has its own PMA or PMG
4.From the engine main generator
3.It has its own PMA or PMG
What is another name for the FAN in a turbofan engine
Select one:
1.The Roadie
2.LP Compressor
3.Initial Compressor
4.HP Compressor
2.LP Compressor
If the oil contents were rising and oil pressure was dropping, which component is most likely to be at fault?
Select one:
1.FCOC
2.FCU
3.MFI
4.FADEC
1.FCOC
Which statement is true regarding Free Turbines
Select one:
1.They are never used in turbo prop engines and they are never used to drive a compressor.
2.They drive all the loads and compressors in the engine.
3.They drive all the compressors in the engine.
4.Free turbines don’t drive a compressor and can run at a constant speed
4.Free turbines don’t drive a compressor and can run at a constant speed
How is the Accessory Gearbox at the bottom of the engine casing normally driven
Select one:
1.Mechanically from the HP spool
2.Electrically
3.Mechanically by the Fan Spool
4.Hydraulically
1.Mechanically from the HP spool
Before attempting to relight a Gas Turbine engine it may be required to
Select one:
1.Descend to a lower altitude and/or increase Airspeed
2.Decrease altitude and speed
3.Increase Altitude and Speed
4.Increase Altitude and slow down
1.Descend to a lower altitude and/or increase Airspeed
What is a spool in a Gas Turbine Engine
Select one:
1.The Fan and HP compressor
2.The Compressor
3.The Turbine
4.It is a compressor and it’s associated turbine.
4.It is a compressor and it’s associated turbine.
Which of the following are used to help prevent stall and surge Select 4 answers
Select one or more:
1.Interstage Bleed Valves
2.Multi Turbine stages
3.Multiple Spools
4.VNGVs
5.VSVs
6.N1 fans
7.VIGVs
1.Interstage Bleed Valves
3.Multiple Spools
5.VSVs
7.VIGVs
Which of the following is the correct start sequence for a gas turbine engine?
Select one:
1.Starter, Rotation, Ignition On, Fuel On, Light Up, Starter Off, Self Sustaining Speed, Acceleration to Idle.
2.Starter, Fuel On, Ignition On, Light Up, Self Sustaining Speed, Starter Off, Acceleration to Idle.
3.Starter, Rotation, Fuel On, Light Up, Self Sustaining Speed, Ignition On, Starter Off, Acceleration to Idle.
4.Starter, Rotation, Ignition On, Fuel On, Light Up, Self Sustaining Speed, Starter Off, Acceleration to Idle.
4.Starter, Rotation, Ignition On, Fuel On, Light Up, Self Sustaining Speed, Starter Off, Acceleration to Idle.
