Mechanical Engineering Exam > Mechanical Engineering Questions > Assertion (A): It is desirable to increase th...
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Assertion (A): It is desirable to increase the length of arc over which the oil film has to be maintained in a journal bearing.
Reason (R): The oil pressure becomes negative in the divergent part and the partial vacuum created will cause air to leak in from the ends of bearing.
- 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 'A'. Can you explain this answer?
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Assertion (A): It is desirable to increase the length of arc over whic...
Explanation:
Desirability of Increasing Arc Length:
- It is desirable to increase the length of the arc over which the oil film has to be maintained in a journal bearing because a longer arc length provides a larger contact area between the bearing and the journal.
- This larger contact area helps in distributing the load more evenly, reducing the pressure on any specific point and preventing local overheating.
Reason for Negative Oil Pressure:
- The reason for the negative oil pressure in the divergent part of the bearing is due to the oil film being pulled apart as the journal rotates.
- This partial vacuum created can cause air to leak in from the ends of the bearing, disrupting the lubrication process and leading to potential damage.
Explanation of Assertion and Reason:
- The assertion that increasing the arc length is desirable is true because it helps in improving the load distribution and reducing the possibility of local overheating.
- The reason provided for the negative oil pressure and air leakage further supports the importance of maintaining a continuous and stable oil film over a longer arc length to prevent such issues.
Therefore, both the assertion and reason are individually true, and the reason correctly explains why increasing the arc length in a journal bearing is desirable.
Desirability of Increasing Arc Length:
- It is desirable to increase the length of the arc over which the oil film has to be maintained in a journal bearing because a longer arc length provides a larger contact area between the bearing and the journal.
- This larger contact area helps in distributing the load more evenly, reducing the pressure on any specific point and preventing local overheating.
Reason for Negative Oil Pressure:
- The reason for the negative oil pressure in the divergent part of the bearing is due to the oil film being pulled apart as the journal rotates.
- This partial vacuum created can cause air to leak in from the ends of the bearing, disrupting the lubrication process and leading to potential damage.
Explanation of Assertion and Reason:
- The assertion that increasing the arc length is desirable is true because it helps in improving the load distribution and reducing the possibility of local overheating.
- The reason provided for the negative oil pressure and air leakage further supports the importance of maintaining a continuous and stable oil film over a longer arc length to prevent such issues.
Therefore, both the assertion and reason are individually true, and the reason correctly explains why increasing the arc length in a journal bearing is desirable.
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Assertion (A): It is desirable to increase the length of arc over which the oil film has to be maintained in a journal bearing. Reason (R): The oil pressure becomes negative in the divergent part and the partial vacuum created will cause air to leak in from the ends of bearing.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 'A'. Can you explain this answer?
Question Description
Assertion (A): It is desirable to increase the length of arc over which the oil film has to be maintained in a journal bearing. Reason (R): The oil pressure becomes negative in the divergent part and the partial vacuum created will cause air to leak in from the ends of bearing.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 'A'. 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): It is desirable to increase the length of arc over which the oil film has to be maintained in a journal bearing. Reason (R): The oil pressure becomes negative in the divergent part and the partial vacuum created will cause air to leak in from the ends of bearing.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 'A'. 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): It is desirable to increase the length of arc over which the oil film has to be maintained in a journal bearing. Reason (R): The oil pressure becomes negative in the divergent part and the partial vacuum created will cause air to leak in from the ends of bearing.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 'A'. Can you explain this answer?.
Assertion (A): It is desirable to increase the length of arc over which the oil film has to be maintained in a journal bearing. Reason (R): The oil pressure becomes negative in the divergent part and the partial vacuum created will cause air to leak in from the ends of bearing.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 'A'. 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): It is desirable to increase the length of arc over which the oil film has to be maintained in a journal bearing. Reason (R): The oil pressure becomes negative in the divergent part and the partial vacuum created will cause air to leak in from the ends of bearing.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 'A'. 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): It is desirable to increase the length of arc over which the oil film has to be maintained in a journal bearing. Reason (R): The oil pressure becomes negative in the divergent part and the partial vacuum created will cause air to leak in from the ends of bearing.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 'A'. Can you explain this answer?.
Solutions for Assertion (A): It is desirable to increase the length of arc over which the oil film has to be maintained in a journal bearing. Reason (R): The oil pressure becomes negative in the divergent part and the partial vacuum created will cause air to leak in from the ends of bearing.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 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering.
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Here you can find the meaning of Assertion (A): It is desirable to increase the length of arc over which the oil film has to be maintained in a journal bearing. Reason (R): The oil pressure becomes negative in the divergent part and the partial vacuum created will cause air to leak in from the ends of bearing.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 'A'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of
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ample number of questions to practice Assertion (A): It is desirable to increase the length of arc over which the oil film has to be maintained in a journal bearing. Reason (R): The oil pressure becomes negative in the divergent part and the partial vacuum created will cause air to leak in from the ends of bearing.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 'A'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
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