Aircraft Engines & Propulsion

Put the four main stages of engine operation in order:

• intake

• compression

• power

• exhaust

Which component of a jet engine is responsible for compressing the incoming air before it enters the combustion chamber?

• Turbine

• Compressor

• Nozzle

• Fan

In a turboprop engine, what is the primary function of the propeller?

• To increase the engine's thrust by accelerating air

• To cool the engine components

• To reduce noise levels

• To stabilize the aircraft

What is the main difference between a turbojet and a turbofan engine?

• Turbojets are more fuel-efficient than turbofans

• Turbofans have a bypass air stream, while turbojets do not

• Turbojets are quieter than turbofans

• Turbofans are used only in military aircraft

What is the role of the turbine in a jet engine?

• To compress the air entering the engine

• To extract energy from the exhaust gases

• To ignite the fuel-air mixture

• To direct the exhaust flow

In a turboprop engine, what component connects the turbine to the propeller?

• Gearbox

• Shaft

• Nozzle

• Combustion chamber

What is a key advantage of turbofan engines over turbojet engines?

• Higher speed capability

• Greater fuel efficiency

• Simpler design

• Lower maintenance cost

Which of the following is a measure of an engine's efficiency in converting fuel into thrust?

• Specific fuel consumption

• Thrust-to-weight ratio

• Power output

• Thermal efficiency

What is the primary purpose of the combustion chamber in a jet engine?

• To cool the air before it enters the turbine

• To mix fuel with air and ignite the mixture

• To increase the pressure of the air

• To direct the exhaust gases

In a turboprop engine, what is the main advantage of using a propeller?

• Higher speed at high altitudes

• Better fuel efficiency at lower speeds

• Reduced noise levels

• Increased engine lifespan