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Assertion (A): The degree of hunting with an unstable governor will be less than with an isochronous governor.
Reason (R): With an unstable governor, once the sleeve has moved from one extreme position to the other, a finite change of speed is required to cause it to move back again.
- 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): The degree of hunting with an unstable governor will be...
-Hunting is a result of too sensitiveness of governor. It causes continuous fluctuation in engine speed, above and below the mean speed. This phenomenon is known as hunting. The high sensitiveness of governor results in substantial change in fuel supply for small change in engine speed.
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Assertion (A): The degree of hunting with an unstable governor will be...
Assertion (A): The degree of hunting with an unstable governor will be less than with an isochronous governor.
Reason (R): With an unstable governor, once the sleeve has moved from one extreme position to the other, a finite change of speed is required to cause it to move back again.
The correct answer is option A. Both the assertion (A) and reason (R) are individually true, and R is the correct explanation of A.
Explanation:
Unstable Governor:
- An unstable governor is a type of governor system used in engines and turbines. It operates on the principle of negative feedback to maintain a relatively constant speed.
- It consists of a pair of rotating weights called flyballs, which are linked to a sleeve that slides up and down a spindle. The sleeve controls the fuel or steam supply to the engine.
- When the speed of the engine decreases, the flyballs move outward due to centrifugal force, causing the sleeve to move up and increase the fuel or steam supply.
- Similarly, when the speed of the engine increases, the flyballs move inward, causing the sleeve to move down and decrease the fuel or steam supply.
Isochronous Governor:
- An isochronous governor is a type of governor system that is designed to maintain a constant speed regardless of the load variations.
- It is more stable compared to an unstable governor as it automatically adjusts the fuel or steam supply to maintain a constant speed.
- The isochronous governor achieves this by adjusting the position of the sleeve based on the speed of the engine.
- If the speed decreases, the sleeve moves up to increase the fuel or steam supply, and if the speed increases, the sleeve moves down to decrease the fuel or steam supply.
Explanation of Assertion and Reason:
Assertion (A): The degree of hunting with an unstable governor will be less than with an isochronous governor.
- Hunting refers to the oscillation or fluctuation in the speed of an engine due to the governor's response to load changes.
- In an unstable governor, the sleeve moves in response to changes in speed. Once the sleeve has moved from one extreme position to the other, a finite change in speed is required to cause it to move back again.
- This finite change in speed reduces the hunting effect and stabilizes the speed of the engine.
Reason (R): With an unstable governor, once the sleeve has moved from one extreme position to the other, a finite change of speed is required to cause it to move back again.
- The reason correctly explains the behavior of an unstable governor. Once the sleeve has moved to one extreme position, the centrifugal force acting on the flyballs decreases, causing the sleeve to move back to the other extreme position.
- However, this movement requires a finite change in speed to reverse the direction of movement. This finite change in speed reduces the hunting effect and stabilizes the speed of the engine.
Conclusion:
Based on the explanation above, both the assertion (A) and reason (R) are true, and R is the correct explanation of A. Therefore, the correct answer is option A.
Reason (R): With an unstable governor, once the sleeve has moved from one extreme position to the other, a finite change of speed is required to cause it to move back again.
The correct answer is option A. Both the assertion (A) and reason (R) are individually true, and R is the correct explanation of A.
Explanation:
Unstable Governor:
- An unstable governor is a type of governor system used in engines and turbines. It operates on the principle of negative feedback to maintain a relatively constant speed.
- It consists of a pair of rotating weights called flyballs, which are linked to a sleeve that slides up and down a spindle. The sleeve controls the fuel or steam supply to the engine.
- When the speed of the engine decreases, the flyballs move outward due to centrifugal force, causing the sleeve to move up and increase the fuel or steam supply.
- Similarly, when the speed of the engine increases, the flyballs move inward, causing the sleeve to move down and decrease the fuel or steam supply.
Isochronous Governor:
- An isochronous governor is a type of governor system that is designed to maintain a constant speed regardless of the load variations.
- It is more stable compared to an unstable governor as it automatically adjusts the fuel or steam supply to maintain a constant speed.
- The isochronous governor achieves this by adjusting the position of the sleeve based on the speed of the engine.
- If the speed decreases, the sleeve moves up to increase the fuel or steam supply, and if the speed increases, the sleeve moves down to decrease the fuel or steam supply.
Explanation of Assertion and Reason:
Assertion (A): The degree of hunting with an unstable governor will be less than with an isochronous governor.
- Hunting refers to the oscillation or fluctuation in the speed of an engine due to the governor's response to load changes.
- In an unstable governor, the sleeve moves in response to changes in speed. Once the sleeve has moved from one extreme position to the other, a finite change in speed is required to cause it to move back again.
- This finite change in speed reduces the hunting effect and stabilizes the speed of the engine.
Reason (R): With an unstable governor, once the sleeve has moved from one extreme position to the other, a finite change of speed is required to cause it to move back again.
- The reason correctly explains the behavior of an unstable governor. Once the sleeve has moved to one extreme position, the centrifugal force acting on the flyballs decreases, causing the sleeve to move back to the other extreme position.
- However, this movement requires a finite change in speed to reverse the direction of movement. This finite change in speed reduces the hunting effect and stabilizes the speed of the engine.
Conclusion:
Based on the explanation above, both the assertion (A) and reason (R) are true, and R is the correct explanation of A. Therefore, the correct answer is option A.
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Assertion (A): The degree of hunting with an unstable governor will be less than with an isochronous governor.Reason (R): With an unstable governor, once the sleeve has moved from one extreme position to the other, a finite change of speed is required to cause it to move back again.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 'A'. Can you explain this answer?
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Assertion (A): The degree of hunting with an unstable governor will be less than with an isochronous governor.Reason (R): With an unstable governor, once the sleeve has moved from one extreme position to the other, a finite change of speed is required to cause it to move back again.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 '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): The degree of hunting with an unstable governor will be less than with an isochronous governor.Reason (R): With an unstable governor, once the sleeve has moved from one extreme position to the other, a finite change of speed is required to cause it to move back again.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 '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): The degree of hunting with an unstable governor will be less than with an isochronous governor.Reason (R): With an unstable governor, once the sleeve has moved from one extreme position to the other, a finite change of speed is required to cause it to move back again.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 'A'. Can you explain this answer?.
Assertion (A): The degree of hunting with an unstable governor will be less than with an isochronous governor.Reason (R): With an unstable governor, once the sleeve has moved from one extreme position to the other, a finite change of speed is required to cause it to move back again.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 '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): The degree of hunting with an unstable governor will be less than with an isochronous governor.Reason (R): With an unstable governor, once the sleeve has moved from one extreme position to the other, a finite change of speed is required to cause it to move back again.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 '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): The degree of hunting with an unstable governor will be less than with an isochronous governor.Reason (R): With an unstable governor, once the sleeve has moved from one extreme position to the other, a finite change of speed is required to cause it to move back again.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 'A'. Can you explain this answer?.
Solutions for Assertion (A): The degree of hunting with an unstable governor will be less than with an isochronous governor.Reason (R): With an unstable governor, once the sleeve has moved from one extreme position to the other, a finite change of speed is required to cause it to move back again.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 'A'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering.
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ample number of questions to practice Assertion (A): The degree of hunting with an unstable governor will be less than with an isochronous governor.Reason (R): With an unstable governor, once the sleeve has moved from one extreme position to the other, a finite change of speed is required to cause it to move back again.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 'A'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
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