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40 1f- Aircraft Gas T Comurplbiete Sone Englutiinone Systes!! m Exam With
What is Newton's third law of motion? -and opposite reaction. ANSWER>>For every action there is an equal
What 4 environmental factors effect thrust? -Temperature, Humidity ANSWER>>Density, Pressure,
What are the 4 sections of a gas turbine engine? -Combustion Chamber, Turbine, Nozzle ANSWER>>Compressor,
What does a Compressor do? -air ANSWER>>Sucks in and pressurizes (compresses) the
What does a Combustion Chamber do? -which ignites. ANSWER>>Mixes fuel and compressed air,
What does a Turbine do? -chamber, drives the compressor and accessories. ANSWER>>Spun by the exhaust of the combustion
What does a Nozzle do? -exhaust. ANSWER>>Controls velocity of exhaust gases, directs
Where is the extra fuel added in an augmented engine? (Think afterburners) -ANSWER>>The nozzle.
What are the 4 types of gas turbine engines? -Turbo Shaft, Turbo Fan ANSWER>>Turbo Jet, Turbo Prop,
How does a turbo jet make thrust? - ANSWER>>From exhaust, directed by nozzle. How does a turbo prop create thrust? - ANSWER>>Propeller driven by turbine engine. What flight speeds/efficiency do turbo props exhibit? -efficiency ANSWER>>Subsonic/High
Does a turbo shaft produce thrust? What kind of vehicle does it get installed in?ANSWER>>No thrust-to turbo shaft; instead, engine turns a shaft. Installation in helicopters, ships, and tanks. What is the difference between a turbo fan and a turbo jet? -concept. Primary flow drives the turbine and secondary flow around the engine core. ANSWER>>Flow bypass
What is the difference between high and low bypass turbofans? -bypass: Fan area much larger than primary core area. ANSWER>>High Low bypass: Fan area slight larger than primary core area are similar. A high bypass fan is used in what aircraft? -(Larger) ANSWER>>Cargo and tanker aircraft
A low bypass fan is used in what aircraft? - ANSWER>>Fighter (Smaller) Subsonic aircraft have what type of intake housing? -pressure loss at compressor inlet. ANSWER>>Short, minimizes
Supersonic aircraft have what kind of intake housing? -ANSWER>>Convergent/Divergent inlet, slows supersonic airflow to subsonic. Supersonic air going into the engine would damage it, and not allow the aircraft to fly.
Engine start system does what? -RPM. ANSWER>>Rotates the engine to self sustaining
What two types of starters are there? - ANSWER>>Pneumatic (APU, -60 cart) What are the benefits of the lubrication system? -bearings and gearbox. ANSWER>>Lubricates, cools, cleans
What does a chip detector do? -avoid catastrophic failure. ANSWER>>Detects metal shavings in the engine, to
What does the electrical system provide? -sensors, control system etc. ANSWER>>Electrical power for ignition,
What does the fuel system do? - ANSWER>>Provides fuel to the combustion chamber. What does fuel volume depend on? - ANSWER>>Throttle position. Sensors of what are considered as critical engine data? - -pressure, RPM, light off detector ANSWER>>Temperature,
Name two types of engine control systems. -Control DEEC and Full Authority Digital Electronic Control FADEC ANSWER>>Digital Electronic Engine
What does the engine control system do to control thrust? -engine operation for proper fuel delivery, controls air flow and nozzles. ANSWER>>Controls
Does the engine control system produce fault codes? - ANSWER>>Yes How does the Air Force track engine stock quantities and components? -
ANSWER>>Central Engine Management System (CEMS) In CEMS, what does centralized management allows for- -economical logistics ANSWER>>Responsive and
In CEMS, distribution of assets allows for- -they need ANSWER>>Each wing to have the spares
In CEMS, inventory control requires- - ANSWER>>Items kept at lowest possible level In CEMS, computation of spares allows for- - ANSWER>>Minimal risk to assets What is the Headquarters Air Force's role in engine management? -general policy and guidance. ANSWER>>Create
What is the MAJCOMs' role in engine management? -directives to fit their needs. ANSWER>>Supplement the AF
What is Air Force Materiel Command's role in engine management? -ANSWER>>Maintain centralized control, assigns a program manager for each type of engine. What are the Base Engine Manager's role in engine management? -base engine account. ANSWER>>Accept
Parts life cycle tracking includes Operating Time and- -other operation parameters. ANSWER>>Temperatures and
CEMS takes input from and gives information to what 4 organizations? -ANSWER>>Depot, Flight Line, Base Engine Manager, Propulsion Flight
