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Questions and Answers
In turbo fan engine, the jet velocity as compared to turbojet engine is
In turbo fan engine, the jet velocity as compared to turbojet engine is
- May be less or more depending upon speed
- Same
- More
- Less (correct)
Turbofan engine employs
Turbofan engine employs
- Solid fuel firing
- No air stream
- Two or more air streams (correct)
- One air stream
Aeroplanes employ following type of compressor
Aeroplanes employ following type of compressor
- Radial flow
- Axial flow (correct)
- Centrifugal
- None of the above
Expansion in the turbine of Jet Propulsion is to
Expansion in the turbine of Jet Propulsion is to
Cycle used in turbojet engine is
Cycle used in turbojet engine is
Ram Jet engine uses
Ram Jet engine uses
The performance of Ram Jet engine is best at
The performance of Ram Jet engine is best at
A rocket engine uses
A rocket engine uses
The thrust developed in turbojet engine is the
The thrust developed in turbojet engine is the
Which of the following statement is true?
Which of the following statement is true?
The propulsive efficiency is given by
The propulsive efficiency is given by
The bypass ratio is the ratio of
The bypass ratio is the ratio of
Increasing the bypass ratio of turbofan engine _____ thrust.
Increasing the bypass ratio of turbofan engine _____ thrust.
In aircraft propulsion the most widely used engine is
In aircraft propulsion the most widely used engine is
In a jet propulsion, the propulsive matter is
In a jet propulsion, the propulsive matter is
In the aircraft propellers, the propulsive matter is
In the aircraft propellers, the propulsive matter is
The efficiency of a jet engine is higher at
The efficiency of a jet engine is higher at
Only rocket engines can be propelled to space because
Only rocket engines can be propelled to space because
In a jet propulsion unit, the products of combustion after passing through the gas turbine are discharged into
In a jet propulsion unit, the products of combustion after passing through the gas turbine are discharged into
The velocity of air entering in a rocket is _____ as compared to an aircraft.
The velocity of air entering in a rocket is _____ as compared to an aircraft.
A turbo-prop is preferred to turbo-jet because
A turbo-prop is preferred to turbo-jet because
Flashcards
Turbofan vs. Turbojet Velocity
Turbofan vs. Turbojet Velocity
Jet velocity is lower in turbofan engines compared to turbojet engines.
Turbofan Air Streams
Turbofan Air Streams
Turbofan engines use two or more air streams, bypassing some air around the core.
Compressor type in aeroplanes
Compressor type in aeroplanes
Axial flow compressors are used in aeroplanes for efficient compression.
Turbine Expansion Purpose
Turbine Expansion Purpose
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Cycle in Turbojet Engine
Cycle in Turbojet Engine
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Ramjet Optimal Speed
Ramjet Optimal Speed
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Rocket Propellants
Rocket Propellants
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Turbojet thrust
Turbojet thrust
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Engine Inlet/Exit Pressure
Engine Inlet/Exit Pressure
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Propulsive Efficiency Formula
Propulsive Efficiency Formula
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Study Notes
- Jet velocity in a turbofan engine is less compared to a turbojet engine.
- Turbofan engines employ two or more air streams.
- Aeroplanes employ axial flow compressors.
- Expansion in the turbine of Jet Propulsion runs the compressor and the accessories.
- The Brayton Cycle is used in turbojet engines.
- Ram Jet engines don't use compressors.
- Ram Jet engine performance is best at high speeds.
- Rocket engines use solid and liquid propellants.
- Thrust developed in a turbojet engine is an unbalanced force.
- The pressure at the inlet and exit of an engine is at ambient pressures.
- Propulsive efficiency is given by propulsive power / energy input rate.
- Bypass ratio is the mass flow rates of two streams.
- Increasing the bypass ratio of a turbofan engine increases thrust.
- The turbofan engine is the most widely used engine in aircraft propulsion.
- In jet propulsion, the propulsive matter is caused to flow around the propelled body.
- In aircraft propellers, the propulsive matter is ejected from within the propelled body.
- The efficiency of jet engines is higher at high altitudes.
- Rocket engines can be propelled into space because of not needing air.
- A jet propulsion unit discharges its products of combustion into a discharge nozzle.
- The velocity of air entering a rocket is zero compared to an aircraft.
- A turbo-prop is preferred to a turbo-jet for high power for take-off.
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