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Assertion (A): With increase in discharge in a single stage centrifugal pump the BHP goes on increasing but beyond a certain discharge the BHP starts decreasing.
Reason (R): Efficiency of the pump starts decreasing beyond a certain discharge.
Reason (R): Efficiency of the pump starts decreasing beyond a certain discharge.
- 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 'D'. Can you explain this answer?
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Assertion (A): With increase in discharge in a single stage centrifuga...
Ans. (d) A is false and R is true.
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Assertion (A): With increase in discharge in a single stage centrifuga...
Assertion (A): With an increase in discharge in a single-stage centrifugal pump, the BHP (Brake Horsepower) goes on increasing.
Reason (R): Efficiency of the pump starts decreasing beyond a certain discharge.
Explanation:
The Brake Horsepower (BHP) is the power required to drive the pump and is directly related to the discharge of the pump. The efficiency of the pump is also affected by the discharge.
Relation between BHP and Discharge:
- When the discharge of the pump increases, the BHP required to drive the pump also increases. This is because a higher discharge requires the pump to work against a higher resistance, resulting in higher power requirements.
- Therefore, Assertion (A) is true.
Relation between Efficiency and Discharge:
- The efficiency of a pump is defined as the ratio of the hydraulic power output to the input power.
- As the discharge of the pump increases, the efficiency initially increases due to a better utilization of the input power.
- However, beyond a certain discharge, the efficiency starts to decrease. This is because the pump is operating away from its best efficiency point and is experiencing more internal losses, such as friction and recirculation losses.
- Therefore, Reason (R) is also true.
Explanation of Correct Answer:
The correct answer is option 'D' - A is false but R is true.
- While the BHP increases with an increase in discharge, there is no specific point beyond which the BHP starts decreasing. The BHP continues to increase as long as the discharge increases, assuming other parameters remain constant.
- However, the efficiency of the pump does start decreasing beyond a certain discharge as explained earlier. This decrease in efficiency is not directly related to the BHP.
Therefore, Assertion (A) is false, and Reason (R) is true but not the correct explanation of Assertion (A).
Reason (R): Efficiency of the pump starts decreasing beyond a certain discharge.
Explanation:
The Brake Horsepower (BHP) is the power required to drive the pump and is directly related to the discharge of the pump. The efficiency of the pump is also affected by the discharge.
Relation between BHP and Discharge:
- When the discharge of the pump increases, the BHP required to drive the pump also increases. This is because a higher discharge requires the pump to work against a higher resistance, resulting in higher power requirements.
- Therefore, Assertion (A) is true.
Relation between Efficiency and Discharge:
- The efficiency of a pump is defined as the ratio of the hydraulic power output to the input power.
- As the discharge of the pump increases, the efficiency initially increases due to a better utilization of the input power.
- However, beyond a certain discharge, the efficiency starts to decrease. This is because the pump is operating away from its best efficiency point and is experiencing more internal losses, such as friction and recirculation losses.
- Therefore, Reason (R) is also true.
Explanation of Correct Answer:
The correct answer is option 'D' - A is false but R is true.
- While the BHP increases with an increase in discharge, there is no specific point beyond which the BHP starts decreasing. The BHP continues to increase as long as the discharge increases, assuming other parameters remain constant.
- However, the efficiency of the pump does start decreasing beyond a certain discharge as explained earlier. This decrease in efficiency is not directly related to the BHP.
Therefore, Assertion (A) is false, and Reason (R) is true but not the correct explanation of Assertion (A).
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Assertion (A): With increase in discharge in a single stage centrifugal pump the BHP goes on increasing but beyond a certain discharge the BHP starts decreasing.Reason (R): Efficiency of the pump starts decreasing beyond a certain discharge.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 'D'. Can you explain this answer?
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Assertion (A): With increase in discharge in a single stage centrifugal pump the BHP goes on increasing but beyond a certain discharge the BHP starts decreasing.Reason (R): Efficiency of the pump starts decreasing beyond a certain discharge.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 '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 Assertion (A): With increase in discharge in a single stage centrifugal pump the BHP goes on increasing but beyond a certain discharge the BHP starts decreasing.Reason (R): Efficiency of the pump starts decreasing beyond a certain discharge.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 '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 Assertion (A): With increase in discharge in a single stage centrifugal pump the BHP goes on increasing but beyond a certain discharge the BHP starts decreasing.Reason (R): Efficiency of the pump starts decreasing beyond a certain discharge.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 'D'. Can you explain this answer?.
Assertion (A): With increase in discharge in a single stage centrifugal pump the BHP goes on increasing but beyond a certain discharge the BHP starts decreasing.Reason (R): Efficiency of the pump starts decreasing beyond a certain discharge.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 '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 Assertion (A): With increase in discharge in a single stage centrifugal pump the BHP goes on increasing but beyond a certain discharge the BHP starts decreasing.Reason (R): Efficiency of the pump starts decreasing beyond a certain discharge.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 '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 Assertion (A): With increase in discharge in a single stage centrifugal pump the BHP goes on increasing but beyond a certain discharge the BHP starts decreasing.Reason (R): Efficiency of the pump starts decreasing beyond a certain discharge.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 'D'. Can you explain this answer?.
Solutions for Assertion (A): With increase in discharge in a single stage centrifugal pump the BHP goes on increasing but beyond a certain discharge the BHP starts decreasing.Reason (R): Efficiency of the pump starts decreasing beyond a certain discharge.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 'D'. 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): With increase in discharge in a single stage centrifugal pump the BHP goes on increasing but beyond a certain discharge the BHP starts decreasing.Reason (R): Efficiency of the pump starts decreasing beyond a certain discharge.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 'D'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
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