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If the radius of the centrifugal pump impeller is reduced from 10 cm, the head developed by the pump will change from 10 m to
- a)9 m of water
- b)8.1 m of water
- c)9.487 m of water
- d)11.111 m of water
Correct answer is option 'B'. Can you explain this answer?
Verified Answer
If the radius of the centrifugal pump impeller is reduced from 10 cm, ...
will remain same even when diameter is reduced.
Most Upvoted Answer
If the radius of the centrifugal pump impeller is reduced from 10 cm, ...
Given:
Radius of impeller, r1 = 10 cm
Head developed by pump, h1 = 10 m
To find:
Head developed by pump when the radius of impeller is reduced to r2
Solution:
Let the head developed by the pump when the radius of impeller is reduced to r2 be h2
As per the affinity laws of centrifugal pumps,
- Head is directly proportional to the square of the impeller radius
- Flow rate is directly proportional to the impeller radius
- Power required is directly proportional to the cube of the impeller radius
Thus, we have the following relationship between the heads:
(h1/h2) = (r1/r2)^2
Substituting the given values, we get:
(10/h2) = (10/ r2)^2
Solving for h2, we get:
h2 = 8.1 m
Therefore, the head developed by the pump will change from 10 m to 8.1 m of water when the radius of the centrifugal pump impeller is reduced from 10 cm.
Radius of impeller, r1 = 10 cm
Head developed by pump, h1 = 10 m
To find:
Head developed by pump when the radius of impeller is reduced to r2
Solution:
Let the head developed by the pump when the radius of impeller is reduced to r2 be h2
As per the affinity laws of centrifugal pumps,
- Head is directly proportional to the square of the impeller radius
- Flow rate is directly proportional to the impeller radius
- Power required is directly proportional to the cube of the impeller radius
Thus, we have the following relationship between the heads:
(h1/h2) = (r1/r2)^2
Substituting the given values, we get:
(10/h2) = (10/ r2)^2
Solving for h2, we get:
h2 = 8.1 m
Therefore, the head developed by the pump will change from 10 m to 8.1 m of water when the radius of the centrifugal pump impeller is reduced from 10 cm.
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If the radius of the centrifugal pump impeller is reduced from 10 cm, the head developed by the pump will change from 10 m toa)9 m of waterb)8.1 m of waterc)9.487 m of waterd)11.111 m of waterCorrect answer is option 'B'. Can you explain this answer? for Civil Engineering (CE) 2025 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about If the radius of the centrifugal pump impeller is reduced from 10 cm, the head developed by the pump will change from 10 m toa)9 m of waterb)8.1 m of waterc)9.487 m of waterd)11.111 m of waterCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for If the radius of the centrifugal pump impeller is reduced from 10 cm, the head developed by the pump will change from 10 m toa)9 m of waterb)8.1 m of waterc)9.487 m of waterd)11.111 m of waterCorrect answer is option 'B'. Can you explain this answer?.
If the radius of the centrifugal pump impeller is reduced from 10 cm, the head developed by the pump will change from 10 m toa)9 m of waterb)8.1 m of waterc)9.487 m of waterd)11.111 m of waterCorrect answer is option 'B'. Can you explain this answer? for Civil Engineering (CE) 2025 is part of Civil Engineering (CE) preparation. The Question and answers have been prepared according to the Civil Engineering (CE) exam syllabus. Information about If the radius of the centrifugal pump impeller is reduced from 10 cm, the head developed by the pump will change from 10 m toa)9 m of waterb)8.1 m of waterc)9.487 m of waterd)11.111 m of waterCorrect answer is option 'B'. Can you explain this answer? covers all topics & solutions for Civil Engineering (CE) 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for If the radius of the centrifugal pump impeller is reduced from 10 cm, the head developed by the pump will change from 10 m toa)9 m of waterb)8.1 m of waterc)9.487 m of waterd)11.111 m of waterCorrect answer is option 'B'. Can you explain this answer?.
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If the radius of the centrifugal pump impeller is reduced from 10 cm, the head developed by the pump will change from 10 m toa)9 m of waterb)8.1 m of waterc)9.487 m of waterd)11.111 m of waterCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for If the radius of the centrifugal pump impeller is reduced from 10 cm, the head developed by the pump will change from 10 m toa)9 m of waterb)8.1 m of waterc)9.487 m of waterd)11.111 m of waterCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of If the radius of the centrifugal pump impeller is reduced from 10 cm, the head developed by the pump will change from 10 m toa)9 m of waterb)8.1 m of waterc)9.487 m of waterd)11.111 m of waterCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
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