Mechanical Engineering Exam > Mechanical Engineering Questions > Assertion (A): In the subsonic range the prop...
Start Learning for Free
Assertion (A): In the subsonic range the propulsive efficiency of a rocket is less thanthat of a turbojet.
Reason (R): The jet velocity of rocket is independent of forward motion.
Reason (R): The jet velocity of rocket is independent of forward motion.
- a)Both A and R are individually true and R is the correct explanation of A
- b)Both A and R are individually true but R is not the correct explanation of A
- c)A is true but R is false
- d)A is false but R is true
Correct answer is option 'B'. Can you explain this answer?
| FREE This question is part of | Download PDF Attempt this Test |
Verified Answer
Assertion (A): In the subsonic range the propulsive efficiency of a ro...
Ans. (b) Both A and R are true but R is not correct explanation of A.
Most Upvoted Answer
Assertion (A): In the subsonic range the propulsive efficiency of a ro...
Understanding Propulsive Efficiency of Rockets vs. Turbojets
In the context of propulsion systems, it is essential to understand the differences between rockets and turbojets, particularly in subsonic flight.
Assertion (A): Propulsive Efficiency Comparison
- In the subsonic range, the propulsive efficiency of a rocket is indeed less than that of a turbojet.
- Turbojets utilize atmospheric air for combustion, leading to higher efficiency at subsonic speeds.
- Rockets, which carry both fuel and oxidizer, tend to have lower propulsive efficiency due to the higher mass flow of propellant required to achieve thrust.
Reason (R): Jet Velocity Independence
- The jet velocity of a rocket is independent of its forward motion.
- While the thrust generated by a rocket does not rely on the surrounding atmosphere, it also means that the effective exhaust velocity is fixed and does not gain additional kinetic energy from forward motion.
- In contrast, turbojets benefit from the forward motion of the aircraft to increase overall jet velocity, enhancing their efficiency.
Conclusion: Individual Truths
- Both the assertion (A) and the reason (R) are true.
- However, R does not provide a correct explanation for A. The efficiency difference arises from the fundamental operational principles of each propulsion system rather than just the independence of jet velocity in rockets.
Thus, the correct answer is option 'B': Both A and R are individually true but R is not the correct explanation of A.
In the context of propulsion systems, it is essential to understand the differences between rockets and turbojets, particularly in subsonic flight.
Assertion (A): Propulsive Efficiency Comparison
- In the subsonic range, the propulsive efficiency of a rocket is indeed less than that of a turbojet.
- Turbojets utilize atmospheric air for combustion, leading to higher efficiency at subsonic speeds.
- Rockets, which carry both fuel and oxidizer, tend to have lower propulsive efficiency due to the higher mass flow of propellant required to achieve thrust.
Reason (R): Jet Velocity Independence
- The jet velocity of a rocket is independent of its forward motion.
- While the thrust generated by a rocket does not rely on the surrounding atmosphere, it also means that the effective exhaust velocity is fixed and does not gain additional kinetic energy from forward motion.
- In contrast, turbojets benefit from the forward motion of the aircraft to increase overall jet velocity, enhancing their efficiency.
Conclusion: Individual Truths
- Both the assertion (A) and the reason (R) are true.
- However, R does not provide a correct explanation for A. The efficiency difference arises from the fundamental operational principles of each propulsion system rather than just the independence of jet velocity in rockets.
Thus, the correct answer is option 'B': Both A and R are individually true but R is not the correct explanation of A.
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
Assertion (A): In the subsonic range the propulsive efficiency of a rocket is less thanthat of a turbojet.Reason (R): The jet velocity of rocket is independent of forward motion.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'B'. Can you explain this answer?
Question Description
Assertion (A): In the subsonic range the propulsive efficiency of a rocket is less thanthat of a turbojet.Reason (R): The jet velocity of rocket is independent of forward motion.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'B'. 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 Assertion (A): In the subsonic range the propulsive efficiency of a rocket is less thanthat of a turbojet.Reason (R): The jet velocity of rocket is independent of forward motion.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'B'. 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 Assertion (A): In the subsonic range the propulsive efficiency of a rocket is less thanthat of a turbojet.Reason (R): The jet velocity of rocket is independent of forward motion.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'B'. Can you explain this answer?.
Assertion (A): In the subsonic range the propulsive efficiency of a rocket is less thanthat of a turbojet.Reason (R): The jet velocity of rocket is independent of forward motion.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'B'. 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 Assertion (A): In the subsonic range the propulsive efficiency of a rocket is less thanthat of a turbojet.Reason (R): The jet velocity of rocket is independent of forward motion.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'B'. 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 Assertion (A): In the subsonic range the propulsive efficiency of a rocket is less thanthat of a turbojet.Reason (R): The jet velocity of rocket is independent of forward motion.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'B'. Can you explain this answer?.
Solutions for Assertion (A): In the subsonic range the propulsive efficiency of a rocket is less thanthat of a turbojet.Reason (R): The jet velocity of rocket is independent of forward motion.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'B'. 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 Assertion (A): In the subsonic range the propulsive efficiency of a rocket is less thanthat of a turbojet.Reason (R): The jet velocity of rocket is independent of forward motion.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'B'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
Assertion (A): In the subsonic range the propulsive efficiency of a rocket is less thanthat of a turbojet.Reason (R): The jet velocity of rocket is independent of forward motion.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for Assertion (A): In the subsonic range the propulsive efficiency of a rocket is less thanthat of a turbojet.Reason (R): The jet velocity of rocket is independent of forward motion.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of Assertion (A): In the subsonic range the propulsive efficiency of a rocket is less thanthat of a turbojet.Reason (R): The jet velocity of rocket is independent of forward motion.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Assertion (A): In the subsonic range the propulsive efficiency of a rocket is less thanthat of a turbojet.Reason (R): The jet velocity of rocket is independent of forward motion.a)Both A and R are individually true and R is the correct explanation of Ab)Both A and R are individually true but R is not the correct explanation of Ac)A is true but R is falsed)A is false but R is trueCorrect answer is option 'B'. 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