Turbine Engines
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Shrouded turbine blades have what advantages over traditional blades? | show 🗑
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| What design feature do some turbine blades have to reduce vibration and improve airflow? | show 🗑
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| In a Dual-Spool Compressor, at what speed does the Low-Speed compressor operate? | show 🗑
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| What variables affect the inlet air density on a turbine engine? | show 🗑
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| Aircraft speed, Altitude, and ambient temperature will all affect the Inlet Air _ of a turbine engine. | show 🗑
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| What does a Dump Valve do, and why? | show 🗑
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| show | Procedure for removing accumulated dirt/deposits on compressor blades.
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| The procedure for removing accumulated dirt deposits on compressor blades is called? | show 🗑
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| What are 3 Types of Turbine Blades (not how they're mounted). | show 🗑
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| What is the purpose of an Automatic Bleed Valve? | show 🗑
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| show | It directs/deflects the gases to a specific angle in the direction of turbine rotation.
-Gases will hit the turbine blades @ desired angle.
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| Main advantage of an Axial-Flow compressor vs. Centrifugal. | show 🗑
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| Should, and how would you blend a Turbine blade? | show 🗑
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| show | Directs (Guides*) air into 1st Stage rotor at the proper angle.
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| show | Stator Vanes
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| show | Do Not move (Think "Stationary"
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| Continued/Excessive heat, and Centrifugal Force on rotor blades will likely cause what? | show 🗑
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| What is Blade Creep? What causes it? | show 🗑
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| Hot Section inspections are normally required when? | show 🗑
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| What factors affect a Turbine engine's Thermal Efficiency? | show 🗑
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| show | Thermal Efficiency
-*Think: Temp that goes in, how much it compresses (heat generated), and how efficiently it does so.
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| show | Axial, with better efficiency.
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| show | Pressure Rise (The pressure rises higher per stage).
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| show | Turns the Compressor
-Ignited gases spin the turbine, which drives the compressor up front, making the engine self-sustaining.
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| show | 15 deg. C
59 deg. F
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| show | 29.92 in/mercury
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| show | Calculating the power of an engine.
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| When an engine with multiple-stage compressors is operated @ high altitudes, the low pressure rotor will (Increase/Decrease) in speed as the compressor load (increases/decreases) | show 🗑
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| show | Increases
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| Stator Vanes serve what purpose in an Axial-flow compressor section? | show 🗑
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| show | Pressure (Think: Rotors speed it up, Stators raise the pressure)
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| show | Split-Spool, Axial-flow
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| The Fan on a Dual-Axial Compressor, Forward-Fan engine is connected to ? | show 🗑
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| If the fuel/air mixture on a turbine is too weak (assuming normal airflow), the result may be_? | show 🗑
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| show | Labyrinth and/or Carbon Rubbing
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| Labyrinth or Carbon Rubbing seals are usually used where in a Turbine Engine? | show 🗑
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| If a turbine engine can't reach T/O EPR before the EGT limit is reached, this could indicate _? | show 🗑
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| What is the proper starting sequence for a turbojet engine? | show 🗑
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| What areas of a turbine engine are susceptible to dirt? | show 🗑
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| Engine driven propellers impart a (large/small) amount of acceleration to a (large/.small) mass of air. | show 🗑
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| show | The transfer of metal from one surface to another.
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| Severe rubbing of turbine engine compressor blades will usually cause what? | show 🗑
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| Who establishes mandatory replacement times for critical engine components? | show 🗑
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| show | Can-Type (Outer case/housing with perforated stainless combustion chamber/liner inside)
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| When subsonic air flows through a Convergent Nozzle, the velocity _? | show 🗑
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| When subsonic air flows through a Divergent Nozzle, the velocity _? | show 🗑
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| show | Increases
(Opposite of subsonic air, where Increasing area increases pressure/decreases velocity.)
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| Possible cause of Turbine Engine High oil temp, with no change in power setting parameters? | show 🗑
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| Two basic parts of a Centrifugal Compressor? | show 🗑
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| The majority of the air passing through the combustion chamber of a turbine engine is used for what? | show 🗑
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| A Turbine Hot Section is most susceptible to what kind of damage? | show 🗑
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| During low-thrust ops, what can help stabilize compressor airflow? | show 🗑
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| show | Compressor stalls @ low thrust.
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| Explain Variable Guide Vanes purpose/operation. | show 🗑
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| Explain how Automatic Compressor Bleed valves prevent compressor stalls. | show 🗑
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| At what stage in a turbine engine are gas pressures the greatest? | show 🗑
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| show | Number of compressor stages.
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| show | Higher compression ratios
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| What is the primary function of a Turbine Engine Exhaust cone? | show 🗑
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| The "Brayton cycle" is also known as the constant _ cycle. | show 🗑
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| Explain the Brayton Cycle principle. | show 🗑
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| In a turbine engine, combustion occurs at a constant (volume/pressure/density) | show 🗑
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| show | They contain carbon, which when exposed to high temperatures, will cause granular embrittlement and lead to cracking.
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| In turbine hot sections, what are safe ways to mark components? | show 🗑
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| What does Newton's Second "Law of Momentum" State? | show 🗑
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| show | They must be degaussed before using them again.
(They would attract ferrous particles and be damaged)
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| What are two methods of removing dirt deposits on a turbine engine? | show 🗑
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| show | Compressor, Combustor and Turbine
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| A compressor stall is caused by a (low/high) angle of attack through the first compressor stages. | show 🗑
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| What two factors affect the AOA of an axial-flow compressor blade? | show 🗑
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| show | In a Centrifugal-flow engine, the diffuser acts like the Stators.
-The Impeller accelerates the air (velocity)
-Diffuser converts velocity to pressure.
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| After a Fuel Control Unit has been replaced on an engine, what must be done? | show 🗑
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| show | Exposure to high operating temperatures
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| show | Multiple Can, Annular, Can-Annular
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| show | Compressor Section
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| First-Stage turbine blades are found to have stress rupture cracks on the leading edges. This is a sign of a _ condition. | show 🗑
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| What is the most | show 🗑
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Created by:
avandermey
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