AMS 274 TURBINES FINAL EXAM WITH
CORRECT QUESTIONS AND ANSWERS
2025
If the anti-ice air valve is open what happens to EGT? - CORRECT-ANSWERSEGT
increases (tachometer and EPR also shift)
How do you calculate EPR? - CORRECT-ANSWERSTurbine discharge/Compressor inlet
pressure
What are the most common type of thermocouples used? - CORRECT-
ANSWERSChromel/Alumel (CA)
What do the older style APUs have in them? - CORRECT-ANSWERSGovernors
What is the typical gear down ratio for pneumatic starters? - CORRECT-ANSWERS25:1
What is the starting sequence for turbine engines? - CORRECT-ANSWERSStarter -->
Ignition --> Fuel
, you hear a clicking noise from the pneumatic starter it indicates: - CORRECT-
ANSWERSThe pawls re-engaging (normal)
Typical air flow in a pneumatic starter: - CORRECT-ANSWERSAir flows into the starter --
> Stator vanes (designed to choke in order to prevent overspeed) --> Turbine
What was Whittle famous for? - CORRECT-ANSWERSInvented the jet engine
What are the 4 types of gas turbines and typical aircraft they are found on: - CORRECT-
ANSWERS1. Turbojet (supersonic)
2. Turbofan (large commercial)
3. Turboprop (larger GA)
4. Turboshaft (helicopters)
What is the Brayton Cyle? - CORRECT-ANSWERSthermodynamic cycle that explains how
gas turbine engines run
Bernoulli's principle: - CORRECT-ANSWERSAs the velocity of a fluid increases, the
pressure exerted by the fluid decreases (convergent ducts: velocity increases and
pressure decreases/divergent ducts: velocity decreases and pressure increases)
CORRECT QUESTIONS AND ANSWERS
2025
If the anti-ice air valve is open what happens to EGT? - CORRECT-ANSWERSEGT
increases (tachometer and EPR also shift)
How do you calculate EPR? - CORRECT-ANSWERSTurbine discharge/Compressor inlet
pressure
What are the most common type of thermocouples used? - CORRECT-
ANSWERSChromel/Alumel (CA)
What do the older style APUs have in them? - CORRECT-ANSWERSGovernors
What is the typical gear down ratio for pneumatic starters? - CORRECT-ANSWERS25:1
What is the starting sequence for turbine engines? - CORRECT-ANSWERSStarter -->
Ignition --> Fuel
, you hear a clicking noise from the pneumatic starter it indicates: - CORRECT-
ANSWERSThe pawls re-engaging (normal)
Typical air flow in a pneumatic starter: - CORRECT-ANSWERSAir flows into the starter --
> Stator vanes (designed to choke in order to prevent overspeed) --> Turbine
What was Whittle famous for? - CORRECT-ANSWERSInvented the jet engine
What are the 4 types of gas turbines and typical aircraft they are found on: - CORRECT-
ANSWERS1. Turbojet (supersonic)
2. Turbofan (large commercial)
3. Turboprop (larger GA)
4. Turboshaft (helicopters)
What is the Brayton Cyle? - CORRECT-ANSWERSthermodynamic cycle that explains how
gas turbine engines run
Bernoulli's principle: - CORRECT-ANSWERSAs the velocity of a fluid increases, the
pressure exerted by the fluid decreases (convergent ducts: velocity increases and
pressure decreases/divergent ducts: velocity decreases and pressure increases)
