AMS 274 TURBINES LATEST
FINAL EXAM
What are the 2 sources oused to cool oil? - ANSWERS-Fuel and air
What are the 3 subsystems in the oil system? - ANSWERS-Scavenge,
pressure, and breather
When is the last-chance filter/system used? - ANSWERS-Only when the
main filter is completely clogged
What is the terminating point within the pressure subsystem in the oil
system? - ANSWERS-Oil jet
What determines a hot tank vs. a cold tank? - ANSWERS-Where the
cooler is located
Hot = cooler located in pressure subsys.
Cold =cooler located in scavenge subsys.
What is engine trimming and what direction is it done in? - ANSWERS-
The final adjustments on the engine and it is done in the INCREASING
direction
END OF
PAGE 1
, AMS 274 TURBINES LATEST
FINAL EXAM
What is the pressurizing and dump valve? - ANSWERS-Dumps fuel at
shutdown so it isn't trapped in the manifold
Why do we trim an engine? - ANSWERS-For idle and max flow
What is important about adjusting the fuel system? - ANSWERS-Fuels
have different specific gravities so the system must be adjusted to
accommodate it
If the anti-ice air valve is open what happens to EGT? - ANSWERS-
EGT increases (tachometer and EPR also shift)
How do you calculate EPR? - ANSWERS-Turbine
discharge/Compressor inlet pressure
What are the most common type of thermocouples used? - ANSWERS-
Chromel/Alumel (CA)
What do the older style APUs have in them? - ANSWERS-Governors
END OF
PAGE 2
FINAL EXAM
What are the 2 sources oused to cool oil? - ANSWERS-Fuel and air
What are the 3 subsystems in the oil system? - ANSWERS-Scavenge,
pressure, and breather
When is the last-chance filter/system used? - ANSWERS-Only when the
main filter is completely clogged
What is the terminating point within the pressure subsystem in the oil
system? - ANSWERS-Oil jet
What determines a hot tank vs. a cold tank? - ANSWERS-Where the
cooler is located
Hot = cooler located in pressure subsys.
Cold =cooler located in scavenge subsys.
What is engine trimming and what direction is it done in? - ANSWERS-
The final adjustments on the engine and it is done in the INCREASING
direction
END OF
PAGE 1
, AMS 274 TURBINES LATEST
FINAL EXAM
What is the pressurizing and dump valve? - ANSWERS-Dumps fuel at
shutdown so it isn't trapped in the manifold
Why do we trim an engine? - ANSWERS-For idle and max flow
What is important about adjusting the fuel system? - ANSWERS-Fuels
have different specific gravities so the system must be adjusted to
accommodate it
If the anti-ice air valve is open what happens to EGT? - ANSWERS-
EGT increases (tachometer and EPR also shift)
How do you calculate EPR? - ANSWERS-Turbine
discharge/Compressor inlet pressure
What are the most common type of thermocouples used? - ANSWERS-
Chromel/Alumel (CA)
What do the older style APUs have in them? - ANSWERS-Governors
END OF
PAGE 2
