401f- Aircraft Gas Turbine Engine System Exam With
Complete Solutions!!
What is Newton's third law of motion? - ANSWER>>For every action there is an equal
and opposite reaction.
What 4 environmental factors effect thrust? - ANSWER>>Density, Pressure,
Temperature, Humidity
What are the 4 sections of a gas turbine engine? - ANSWER>>Compressor,
Combustion Chamber, Turbine, Nozzle
What does a Compressor do? - ANSWER>>Sucks in and pressurizes (compresses) the
air
What does a Combustion Chamber do? - ANSWER>>Mixes fuel and compressed air,
which ignites.
What does a Turbine do? - ANSWER>>Spun by the exhaust of the combustion
chamber, drives the compressor and accessories.
What does a Nozzle do? - ANSWER>>Controls velocity of exhaust gases, directs
exhaust.
Where is the extra fuel added in an augmented engine? (Think afterburners) -
ANSWER>>The nozzle.
What are the 4 types of gas turbine engines? - ANSWER>>Turbo Jet, Turbo Prop,
Turbo Shaft, Turbo Fan
, 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? - ANSWER>>Subsonic/High
efficiency
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? - ANSWER>>Flow bypass
concept. Primary flow drives the turbine and secondary flow around the engine core.
What is the difference between high and low bypass turbofans? - ANSWER>>High
bypass: Fan area much larger than primary core area.
Low bypass: Fan area slight larger than primary core area are similar.
A high bypass fan is used in what aircraft? - ANSWER>>Cargo and tanker aircraft
(Larger)
A low bypass fan is used in what aircraft? - ANSWER>>Fighter (Smaller)
Subsonic aircraft have what type of intake housing? - ANSWER>>Short, minimizes
pressure loss at compressor inlet.
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.
Complete Solutions!!
What is Newton's third law of motion? - ANSWER>>For every action there is an equal
and opposite reaction.
What 4 environmental factors effect thrust? - ANSWER>>Density, Pressure,
Temperature, Humidity
What are the 4 sections of a gas turbine engine? - ANSWER>>Compressor,
Combustion Chamber, Turbine, Nozzle
What does a Compressor do? - ANSWER>>Sucks in and pressurizes (compresses) the
air
What does a Combustion Chamber do? - ANSWER>>Mixes fuel and compressed air,
which ignites.
What does a Turbine do? - ANSWER>>Spun by the exhaust of the combustion
chamber, drives the compressor and accessories.
What does a Nozzle do? - ANSWER>>Controls velocity of exhaust gases, directs
exhaust.
Where is the extra fuel added in an augmented engine? (Think afterburners) -
ANSWER>>The nozzle.
What are the 4 types of gas turbine engines? - ANSWER>>Turbo Jet, Turbo Prop,
Turbo Shaft, Turbo Fan
, 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? - ANSWER>>Subsonic/High
efficiency
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? - ANSWER>>Flow bypass
concept. Primary flow drives the turbine and secondary flow around the engine core.
What is the difference between high and low bypass turbofans? - ANSWER>>High
bypass: Fan area much larger than primary core area.
Low bypass: Fan area slight larger than primary core area are similar.
A high bypass fan is used in what aircraft? - ANSWER>>Cargo and tanker aircraft
(Larger)
A low bypass fan is used in what aircraft? - ANSWER>>Fighter (Smaller)
Subsonic aircraft have what type of intake housing? - ANSWER>>Short, minimizes
pressure loss at compressor inlet.
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.
