Exam Bank Flashcards
Why couldn’t gas turbines be made before 1930s
Materials hear resistant enough
How is fire extiextinguisher bottle discharged
Nozzle head
Newton’s second law
Force = mass x acceleration
What isobaric heating
Heating at constant pressure
Where is titanium alloy used
First stage of HPC
For axial turbine what increases pressure
Stator on its own
Ideal safety distance from engine intake
10 metres
Soap analysis
Spectrometric oil analysis program
How is apu compartment protected
Firewalls
Why are oil coolers built into hp pump
Reduce need for lots of pipeline
Advantage of tip clearance
Fuel efficiency
What reduces vibrations in turbine
Tip shrouds on top of blades
What’s turbo shaft operation
GTE that delivers power through a shaft to operate anything but a propeller
What does combustion chamber housing do
Supports fuel nozzle
How is fuel flow transmitter driven
By Newton’s second law
Overpressure relief valve opens when
Pressure reaches 1250psi
How many apu mounts
3
Where do you use starter motor valve manually
Underside of the engine
What does starter motor use to start the engine
Accessory gearbox
Flashpoint JetA & JetA1
38 degrees C
Freezing point Jet A
-40
Freezing point JetA1
-47 Degrees C
Correlation between EGT and TIT
Positive
What does EPR indicate
Thrust
What is pour point
Lowest tempt oil moves in 31.75mm test tube
What do you do before an engine run
Contact air traffic controller
Axial flow pressure ratio
1:3:1
Axial flow advantage
At optimum compressor speed more efficient & cause less drag
What are the two parts of twin control
Power level and conditioning lever
What displays oil quantity in the cockpit
Engine Interface Unit
Why does combustion case contract quicker then blades
Thinner material
What happens if you over fill oil
Oil can be pumped through vent line into forward bearing compartment or de-oiler
What fire extinguisher agents are used
Halon 1301
What does thrust reverse interlock system do
Makes sure engine power can only be increased after the reverser is fully deployed
What is a dual loop system
A&B independent and identical continuous loop systems
