To generate thrust for forward motion

To provide lift for takeoff and landing

To control the aircraft's attitude and stability

To generate electrical power for onboard systems

Jet engines and propellers

Rockets and propellers

Jet engines and rockets

Propellers and rockets

By expelling high-velocity exhaust gases

By creating a pressure difference between the front and rear of the engine

By rotating a turbine to drive a propeller

By generating lift through the wings

Turbofans have a fan at the front of the engine to increase airflow

Turbojets have a fan at the front of the engine to increase airflow

Turbofans have a compressor at the front of the engine to increase airflow

Turbojets have a compressor at the front of the engine to increase airflow

To generate thrust by pushing air backwards

To generate lift by creating a pressure difference between the upper and lower surfaces of the wing

To control the aircraft's attitude and stability

To generate electrical power for onboard systems

Fixed-pitch propellers have blades that can be adjusted during flight to optimize performance

Variable-pitch propellers have blades that can be adjusted during flight to optimize performance

Fixed-pitch propellers have blades that cannot be adjusted during flight

Variable-pitch propellers have blades that cannot be adjusted during flight

To generate thrust for space travel

To generate lift for takeoff and landing

To control the spacecraft's attitude and stability

To generate electrical power for onboard systems

Solid rocket motors use solid propellant, while liquid rocket engines use liquid propellant

Solid rocket motors use liquid propellant, while liquid rocket engines use solid propellant

Solid rocket motors are more powerful than liquid rocket engines

Liquid rocket engines are more powerful than solid rocket motors

To increase the velocity of the exhaust gases and generate thrust

To reduce the velocity of the exhaust gases and generate thrust

To control the direction of the exhaust gases

To generate electrical power for onboard systems

Single-stage rockets have one stage that burns all the propellant at once

Multi-stage rockets have multiple stages that burn the propellant in sequence

Single-stage rockets are more efficient than multi-stage rockets

Multi-stage rockets are more efficient than single-stage rockets

To regulate the flow of fuel and air into the engine

To monitor and adjust the engine's operating parameters

To control the aircraft's attitude and stability

To generate electrical power for onboard systems

To increase the thrust of the engine by injecting additional fuel into the exhaust

To reduce the noise of the engine by suppressing the exhaust gases

To control the direction of the exhaust gases

To generate electrical power for onboard systems

Turboprop engines drive a propeller, while turboshaft engines drive a rotor

Turboprop engines drive a rotor, while turboshaft engines drive a propeller

Turboprop engines are more powerful than turboshaft engines

Turboshaft engines are more powerful than turboprop engines

To reverse the direction of the thrust to slow down the aircraft

To increase the thrust of the engine by directing the exhaust gases forward

To control the direction of the exhaust gases

To generate electrical power for onboard systems

Ramjets operate at supersonic speeds, while scramjets operate at hypersonic speeds

Ramjets operate at hypersonic speeds, while scramjets operate at supersonic speeds

Ramjets use a compressor to increase the pressure of the incoming air, while scramjets do not

Scramjets use a compressor to increase the pressure of the incoming air, while ramjets do not