Mechanical Engineering Exam > Mechanical Engineering Questions > Assertion ( A): In equilibrium position, the ...
Start Learning for Free
Assertion ( A): In equilibrium position, the journal inside a journal bearing remains floating on the oil film.
Reason (R): In a journal bearing, the load on the bearing is perpendicular to the axis of the journal.
- 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 equilibrium position, the journal inside a journal ...
Both A and R are true but R is not correct explanation for A.
Most Upvoted Answer
Assertion ( A): In equilibrium position, the journal inside a journal ...
Assertion (A): In equilibrium position, the journal inside a journal bearing remains floating on the oil film.
Reason (R): In a journal bearing, the load on the bearing is perpendicular to the axis of the journal.
Explanation:
The given assertion and reason are related to the behavior of a journal bearing in equilibrium. Let's analyze each statement separately to understand why option B is the correct answer.
Assertion (A): In equilibrium position, the journal inside a journal bearing remains floating on the oil film.
- The journal bearing is a type of plain bearing where a shaft (journal) rotates inside a bushing (bearing).
- The bearing is typically filled with a lubricating oil, which forms a film between the journal and the bearing surface.
- In the equilibrium position, the journal remains centered within the bearing due to the hydrodynamic pressure generated by the oil film.
- This hydrodynamic pressure lifts the journal and prevents direct metal-to-metal contact between the journal and the bearing.
- Therefore, the journal "floats" on the oil film, ensuring smooth rotation with minimal friction and wear.
Reason (R): In a journal bearing, the load on the bearing is perpendicular to the axis of the journal.
- When a load is applied to a journal bearing, it is transmitted through the shaft to the bearing.
- The load is typically applied in a direction perpendicular to the axis of the journal.
- This means that the load acts radially on the bearing, causing the journal to exert pressure on the oil film in a radial direction.
- The pressure generated by the load and the hydrodynamic action of the oil film create a lifting force that counters the applied load.
- As a result, the journal remains centered within the bearing, floating on the oil film.
Explanation of Option B:
Option B states that both the assertion and the reason are individually true, but the reason is not the correct explanation of the assertion.
- The assertion (A) is true because in the equilibrium position, the journal does indeed float on the oil film in a journal bearing.
- The reason (R) is also true because the load on the bearing is indeed perpendicular to the axis of the journal.
- However, the reason does not explain why the journal floats on the oil film. It only explains the direction of the load on the bearing.
- The floating behavior of the journal is primarily due to the hydrodynamic pressure generated by the oil film, which counters the applied load and keeps the journal centered within the bearing.
- Therefore, option B is the correct answer.
In summary, the journal in a journal bearing remains floating on the oil film in the equilibrium position due to the hydrodynamic pressure generated by the oil film, which counteracts the applied load. The load on the bearing is indeed perpendicular to the axis of the journal, but this reason alone does not explain the floating behavior of the journal.
Reason (R): In a journal bearing, the load on the bearing is perpendicular to the axis of the journal.
Explanation:
The given assertion and reason are related to the behavior of a journal bearing in equilibrium. Let's analyze each statement separately to understand why option B is the correct answer.
Assertion (A): In equilibrium position, the journal inside a journal bearing remains floating on the oil film.
- The journal bearing is a type of plain bearing where a shaft (journal) rotates inside a bushing (bearing).
- The bearing is typically filled with a lubricating oil, which forms a film between the journal and the bearing surface.
- In the equilibrium position, the journal remains centered within the bearing due to the hydrodynamic pressure generated by the oil film.
- This hydrodynamic pressure lifts the journal and prevents direct metal-to-metal contact between the journal and the bearing.
- Therefore, the journal "floats" on the oil film, ensuring smooth rotation with minimal friction and wear.
Reason (R): In a journal bearing, the load on the bearing is perpendicular to the axis of the journal.
- When a load is applied to a journal bearing, it is transmitted through the shaft to the bearing.
- The load is typically applied in a direction perpendicular to the axis of the journal.
- This means that the load acts radially on the bearing, causing the journal to exert pressure on the oil film in a radial direction.
- The pressure generated by the load and the hydrodynamic action of the oil film create a lifting force that counters the applied load.
- As a result, the journal remains centered within the bearing, floating on the oil film.
Explanation of Option B:
Option B states that both the assertion and the reason are individually true, but the reason is not the correct explanation of the assertion.
- The assertion (A) is true because in the equilibrium position, the journal does indeed float on the oil film in a journal bearing.
- The reason (R) is also true because the load on the bearing is indeed perpendicular to the axis of the journal.
- However, the reason does not explain why the journal floats on the oil film. It only explains the direction of the load on the bearing.
- The floating behavior of the journal is primarily due to the hydrodynamic pressure generated by the oil film, which counters the applied load and keeps the journal centered within the bearing.
- Therefore, option B is the correct answer.
In summary, the journal in a journal bearing remains floating on the oil film in the equilibrium position due to the hydrodynamic pressure generated by the oil film, which counteracts the applied load. The load on the bearing is indeed perpendicular to the axis of the journal, but this reason alone does not explain the floating behavior of the journal.
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 equilibrium position, the journal inside a journal bearing remains floating on the oil film. Reason (R): In a journal bearing, the load on the bearing is perpendicular to the axis of the journal.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 A c)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 equilibrium position, the journal inside a journal bearing remains floating on the oil film. Reason (R): In a journal bearing, the load on the bearing is perpendicular to the axis of the journal.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 A c)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 equilibrium position, the journal inside a journal bearing remains floating on the oil film. Reason (R): In a journal bearing, the load on the bearing is perpendicular to the axis of the journal.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 A c)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 equilibrium position, the journal inside a journal bearing remains floating on the oil film. Reason (R): In a journal bearing, the load on the bearing is perpendicular to the axis of the journal.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 A c)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 equilibrium position, the journal inside a journal bearing remains floating on the oil film. Reason (R): In a journal bearing, the load on the bearing is perpendicular to the axis of the journal.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 A c)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 equilibrium position, the journal inside a journal bearing remains floating on the oil film. Reason (R): In a journal bearing, the load on the bearing is perpendicular to the axis of the journal.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 A c)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 equilibrium position, the journal inside a journal bearing remains floating on the oil film. Reason (R): In a journal bearing, the load on the bearing is perpendicular to the axis of the journal.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 A c)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 equilibrium position, the journal inside a journal bearing remains floating on the oil film. Reason (R): In a journal bearing, the load on the bearing is perpendicular to the axis of the journal.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 A c)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 equilibrium position, the journal inside a journal bearing remains floating on the oil film. Reason (R): In a journal bearing, the load on the bearing is perpendicular to the axis of the journal.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 A c)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 equilibrium position, the journal inside a journal bearing remains floating on the oil film. Reason (R): In a journal bearing, the load on the bearing is perpendicular to the axis of the journal.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 A c)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 equilibrium position, the journal inside a journal bearing remains floating on the oil film. Reason (R): In a journal bearing, the load on the bearing is perpendicular to the axis of the journal.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 A c)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 equilibrium position, the journal inside a journal bearing remains floating on the oil film. Reason (R): In a journal bearing, the load on the bearing is perpendicular to the axis of the journal.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 A c)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 equilibrium position, the journal inside a journal bearing remains floating on the oil film. Reason (R): In a journal bearing, the load on the bearing is perpendicular to the axis of the journal.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 A c)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