Mechanical Engineering Exam > Mechanical Engineering Questions > Consider the following statements:In a turboj...
Start Learning for Free
Consider the following statements:
In a turbojet engine, thrust may be increased by
1. Increasing the jet velocity
2. Increasing the mass flow a rate of air
3. After burning of the fuel.
Of these statements
In a turbojet engine, thrust may be increased by
1. Increasing the jet velocity
2. Increasing the mass flow a rate of air
3. After burning of the fuel.
Of these statements
- a)1 and 2 are correct
- b)2 and 3 are correct
- c)1 and 3 are correct
- d)1, 2 and 3 are correct
Correct answer is option 'D'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
Consider the following statements:In a turbojet engine, thrust may be ...
Ans. (d)
Most Upvoted Answer
Consider the following statements:In a turbojet engine, thrust may be ...
Thrust in a Turbojet Engine
A turbojet engine is a type of air-breathing jet engine that operates on the principle of Newton's third law of motion. It works by expelling high-speed exhaust gases in the opposite direction to generate thrust. The amount of thrust produced by a turbojet engine depends on various factors, including jet velocity, mass flow rate of air, and afterburning of the fuel.
1. Increasing the jet velocity
The jet velocity is directly related to the speed at which the exhaust gases are expelled from the engine. By increasing the jet velocity, the engine can generate more thrust. This can be achieved by:
- Increasing the exhaust nozzle area ratio: This allows for a greater expansion of the exhaust gases, resulting in higher jet velocity.
- Optimizing the engine design: By improving the overall efficiency of the engine, including the compression and combustion processes, the jet velocity can be increased.
2. Increasing the mass flow rate of air
The mass flow rate of air through the engine is another important factor that affects the thrust. By increasing the mass flow rate, more air is available for combustion, resulting in higher thrust. This can be achieved by:
- Increasing the engine's overall pressure ratio: This allows for a higher mass flow rate of air into the engine.
- Optimizing the engine's intake and compressor design: By improving the efficiency of the intake and compressor stages, the mass flow rate of air can be increased.
3. Afterburning of the fuel
Afterburning, also known as reheat, is a process in which additional fuel is injected into the exhaust gases downstream of the combustion chamber and burned. This increases the temperature and velocity of the exhaust gases, resulting in a significant increase in thrust. Afterburning is typically used during takeoff, supersonic flight, and combat situations where maximum thrust is required. However, afterburning also consumes a large amount of fuel and reduces the engine's overall fuel efficiency.
Conclusion
In summary, all three statements are correct. Thrust in a turbojet engine can be increased by increasing the jet velocity, increasing the mass flow rate of air, and through afterburning of the fuel. These factors can be optimized through various engine design and operational techniques to achieve maximum thrust output. However, it is important to note that increasing thrust often comes at the expense of increased fuel consumption and reduced fuel efficiency.
Attention Mechanical Engineering Students!
To make sure you are not studying endlessly, EduRev has designed Mechanical Engineering study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in Mechanical Engineering.
|
Explore Courses for Mechanical Engineering exam
|
|
Similar Mechanical Engineering Doubts
Top Courses for Mechanical EngineeringView all
Consider the following statements:In a turbojet engine, thrust may be increased by1. Increasing the jet velocity2. Increasing the mass flow a rate of air3. After burning of the fuel.Of these statementsa)1 and 2 are correctb)2 and 3 are correctc)1 and 3 are correctd)1, 2 and 3 are correctCorrect answer is option 'D'. Can you explain this answer?
Question Description
Consider the following statements:In a turbojet engine, thrust may be increased by1. Increasing the jet velocity2. Increasing the mass flow a rate of air3. After burning of the fuel.Of these statementsa)1 and 2 are correctb)2 and 3 are correctc)1 and 3 are correctd)1, 2 and 3 are correctCorrect answer is option 'D'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Consider the following statements:In a turbojet engine, thrust may be increased by1. Increasing the jet velocity2. Increasing the mass flow a rate of air3. After burning of the fuel.Of these statementsa)1 and 2 are correctb)2 and 3 are correctc)1 and 3 are correctd)1, 2 and 3 are correctCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements:In a turbojet engine, thrust may be increased by1. Increasing the jet velocity2. Increasing the mass flow a rate of air3. After burning of the fuel.Of these statementsa)1 and 2 are correctb)2 and 3 are correctc)1 and 3 are correctd)1, 2 and 3 are correctCorrect answer is option 'D'. Can you explain this answer?.
Consider the following statements:In a turbojet engine, thrust may be increased by1. Increasing the jet velocity2. Increasing the mass flow a rate of air3. After burning of the fuel.Of these statementsa)1 and 2 are correctb)2 and 3 are correctc)1 and 3 are correctd)1, 2 and 3 are correctCorrect answer is option 'D'. Can you explain this answer? for Mechanical Engineering 2024 is part of Mechanical Engineering preparation. The Question and answers have been prepared according to the Mechanical Engineering exam syllabus. Information about Consider the following statements:In a turbojet engine, thrust may be increased by1. Increasing the jet velocity2. Increasing the mass flow a rate of air3. After burning of the fuel.Of these statementsa)1 and 2 are correctb)2 and 3 are correctc)1 and 3 are correctd)1, 2 and 3 are correctCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Mechanical Engineering 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Consider the following statements:In a turbojet engine, thrust may be increased by1. Increasing the jet velocity2. Increasing the mass flow a rate of air3. After burning of the fuel.Of these statementsa)1 and 2 are correctb)2 and 3 are correctc)1 and 3 are correctd)1, 2 and 3 are correctCorrect answer is option 'D'. Can you explain this answer?.
Solutions for Consider the following statements:In a turbojet engine, thrust may be increased by1. Increasing the jet velocity2. Increasing the mass flow a rate of air3. After burning of the fuel.Of these statementsa)1 and 2 are correctb)2 and 3 are correctc)1 and 3 are correctd)1, 2 and 3 are correctCorrect answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering.
Download more important topics, notes, lectures and mock test series for Mechanical Engineering Exam by signing up for free.
Here you can find the meaning of Consider the following statements:In a turbojet engine, thrust may be increased by1. Increasing the jet velocity2. Increasing the mass flow a rate of air3. After burning of the fuel.Of these statementsa)1 and 2 are correctb)2 and 3 are correctc)1 and 3 are correctd)1, 2 and 3 are correctCorrect answer is option 'D'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Consider the following statements:In a turbojet engine, thrust may be increased by1. Increasing the jet velocity2. Increasing the mass flow a rate of air3. After burning of the fuel.Of these statementsa)1 and 2 are correctb)2 and 3 are correctc)1 and 3 are correctd)1, 2 and 3 are correctCorrect answer is option 'D'. Can you explain this answer?, a detailed solution for Consider the following statements:In a turbojet engine, thrust may be increased by1. Increasing the jet velocity2. Increasing the mass flow a rate of air3. After burning of the fuel.Of these statementsa)1 and 2 are correctb)2 and 3 are correctc)1 and 3 are correctd)1, 2 and 3 are correctCorrect answer is option 'D'. Can you explain this answer? has been provided alongside types of Consider the following statements:In a turbojet engine, thrust may be increased by1. Increasing the jet velocity2. Increasing the mass flow a rate of air3. After burning of the fuel.Of these statementsa)1 and 2 are correctb)2 and 3 are correctc)1 and 3 are correctd)1, 2 and 3 are correctCorrect answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Consider the following statements:In a turbojet engine, thrust may be increased by1. Increasing the jet velocity2. Increasing the mass flow a rate of air3. After burning of the fuel.Of these statementsa)1 and 2 are correctb)2 and 3 are correctc)1 and 3 are correctd)1, 2 and 3 are correctCorrect answer is option 'D'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
|
|
Explore Courses for Mechanical Engineering exam
|
|
Suggested Free Tests
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup