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WorksheetsPropulsion - Turbine Engine Fundamentals
Total questions: 46
Worksheet time: 45mins
A body will retain at rest or continue it uniform motion in a straight line until acted upon by an external force.
Newton's first law of motion
Newton's second law of motion
Newton's third law of motion
The acceleration of a body is directly proportional to the force applied to it and is inversely proportional to the mass of the body.
Newton's first law of motion
Newton's second law of motion
Newton's third law of motion
Force developed by a gas turbine engine is proportional to?
Mass of air flowing and acceleration given to that mass of air
Weight of air flowing and speed given to that mass of air
Flow of air injected and acceleration of the mass of air
For every action, there is an equal and opposite reaction.
Newton's first law of motion
Newton's second law of motion
Newton's third law of motion
Exhaust gases leaving a turbojet engine producing a reaction force called?
Lift
Drag
Thrust
What is unique to the definition of work?
Does not mention time as being a factor
Does not mention force as being a factor
Does not mention distance as being a factor
One horsepower equals how much through one vertical foot in one minute?
33,000 lbs
550 lbs
3,000 lbs
What is the main difference between speed and velocity?
Speed does not have direction
Velocity does not have direction
Acceleration is only involved in speed
An object in free fall with no drag is how many feet per second?
32.2
1
9.98
A charged capacitor is an example of which type of energy?
Kinetic
Potential
Static
Total kinetic energy of a body or system is equal to?
The sum of the kinetic energies resulting from each type of motion.
One quarter of the mass of the body times the square of its speed.
mph
The velocity and pressure of a fluid going through a compressed area at a constant flow rate will?
V=Increase P=Decrease
V=Decrease P=Increase
V=Increase P=Increase
The air passages between individual blades of a compressor or turbine in a gas turbine engine is the application of?
Bernoulli
Otto
Brayton
What is the four cycles of the otto cycle in order from start to finish?
Intake, compression, combustion, exhaust
Exhaust, combustion, compression, intake
Intake, combustion, compression, exhaust
The constant pressure cycleis also known as?
Otto
Brayton
Bernoulli
The ratio of the turbine discharge pressure to the engine inlet air pressure is called?
Engine pressure ratio
Aircraft pressure ratio
Work pressure ratio
What are EPR readings dependant on?
Pressure altitude and OAT
Temperature and OAT
Altitude and OAT
Two classifications of thrust producing turbine engines are?
Turbojet and Turbofan
Turboprop and Turboshaft
Turbofan and Turboshaft
Two classifications of torque producing trubine engines are?
Turboprop and Turboshaft
Turbojet and Turbofan
Turbofan and Turboshaft
Which type of engine is this?
Turbojet
Turboshaft
Turbofan
Which type of engine is this?
Turbojet
Turbofan
Turboprop
Which type of engine is this?
Turbojet
Turboshaft
Turbofan
Three basic components of a turbojet engine are?
Compressor, combustor and turbine
Compressor, combustor and exhaust
Propeller, compressor and combustion chamber
Why are turbojets less efficient than turbo fans?
Losses from noise and incomplete combustion
Increase air resistance and amount of fuel required to operate
Theory of operation and weight difference
What is the pressure ratio in a turbofan?
2:1
4:1
8:1
In the otto cycle, what is true about the volume during combustion?
Constant
Increase to decrease
Decrease to increase
How many fixed blades are in a turbofan engine?
20 to 40
40 to 80
10 to 20
Why are turbofans used in almost all airliners?
Fuel efficient and cruise speed capability
Increase thrust and and weight reduction
Short field take off and easier maintenance
How is the propulsive efficiency measured in a turbofan?
Fan bypass ratio
Engine pressure ratio
Engine bypass ratio
The ratio of mass airflow which flows through the fan duct, divided by the mass airflow which flows through the core portion of the engine is called?
Fan bypass ratio
Engine pressure ratio
Engine bypass ratio
A high fan bypass ratio is?
4:1
3:1
1:1
The main types of turboprop engines are?
Fixed and free
One spool and two spool
Jet and fan
What type of engines are used to power helicopters and APU fitted to large commercial aircraft?
Turbofan
Turbojet
Turboshaft
Which two parts are considered the "cold section' of an engine?
Air inlet and compressor
Combustors and compressor
Turbines and exhaust
Fixed turbine turboprop engines are directly connect to?
Compressor, gearbox, propeller
Gear box and propeller shaft
Exhaust outlet and compressor
If a turbine is not directly connected to a compressor in a turboprop engine it is said to be?
Free
Fixed
Moving
Which part of an engine recovers as much of the total pressure of the free airstream as possible and provide a uniform supply of air to allow a efficient operation?
Compressor
Air inlet
Exhaust
The total pressure of the free airstream delivered to the compressor is known as what?
Ram recovery
De-pressure recovery
Stam recovery
What is the primary function of a compressor?
Force air into the engine for combustion and provide the air necessary to produce thrust.
Efficiently eliminate any unwanted air entering the engine
Cause a mechanical compression to the engine allowing more airflow into the engine.
How do you measure a compressor's effectiveness?
Compare static pressure of the of the compressor discharge with the static air pressure at the inlet.
Carrying out frequent periodic inspections.
Install gauges/indicators which affectively will demonstrate the data.
What part of the engine is used for cabin pressurization, air conditioning, fuel system de-icing or pneumatic engne starting?
Compressor bleed air
Air inlet
Exhaust air
What parts do a centrifugal flow compressor consist of?
Impeller, diffuser, manifold
Rotor and stator
Gearbox and propeller shaft
What determines the number of stages in axial flow compressors?
Amount of air and total pressure rise required.
Temperature of the air.
The amount of pressure from the bleed air.
Which part of the axial flow compressor slows the speed of the air inlet and increases the pressure?
Rotor
Shroud
Diffuser
Which section in an engine powers both engine accessorises such as generator, hydraulic pumps, fuel pumps and acting as an oil reservoir, sump or reduction gears?
Accessory
Exhaust
Turbine
Which part of an engine supports the engine weight and allow for transfer of stresses?
Mounts
Shafts
Screens
