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Common Data Question
A centrifugal pump has an efficiency of 80%. The specifications of the pump are:
Discharge = 70 m3/hr, head = 7 m, speed = 1450 rmp and diameter = 2000 mm. If the speed of this pump is increased to 1750 rpm.
A centrifugal pump has an efficiency of 80%. The specifications of the pump are:
Discharge = 70 m3/hr, head = 7 m, speed = 1450 rmp and diameter = 2000 mm. If the speed of this pump is increased to 1750 rpm.
Q. Discharge and head developed are given respectively:
- a)84.48 n m3/Hr and 10.2 m
- b)48.8 m3/Hr and 20 m
- c)48.8 m3/Hr and 10.2 m
- d)58.4 m3/Hr and 12 m
Correct answer is option 'A'. Can you explain this answer?
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Common Data QuestionA centrifugal pump has an efficiency of 80%. The s...
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Common Data QuestionA centrifugal pump has an efficiency of 80%. The s...
**Solution:**
To solve this question, we need to apply the concept of affinity laws for centrifugal pumps. These laws allow us to calculate the changes in pump performance when the speed of the pump is changed.
**Affinity Laws:**
The affinity laws for centrifugal pumps are as follows:
1. Flow Rate (Q) is directly proportional to the pump speed (N).
2. Head (H) is directly proportional to the square of the pump speed (N^2).
3. Power (P) is directly proportional to the cube of the pump speed (N^3).
Using these laws, we can calculate the new values of flow rate and head when the speed of the pump is increased.
**Given Data:**
Efficiency of the pump = 80%
Discharge (Q) = 70 m^3/hr
Head (H) = 7 m
Speed (N) = 1450 rpm
Diameter = 2000 mm
**Step 1: Calculate the new flow rate**
Using the first affinity law, we can calculate the new flow rate (Q2) when the speed is increased to 1750 rpm.
(Q1/Q2) = (N1/N2)
(70/Q2) = (1450/1750)
Q2 = (70 * 1750) / 1450
Q2 = 84.48 m^3/hr
**Step 2: Calculate the new head**
Using the second affinity law, we can calculate the new head (H2) when the speed is increased to 1750 rpm.
(H1/H2) = (N1^2/N2^2)
(7/H2) = (1450^2/1750^2)
H2 = (7 * 1750^2) / 1450^2
H2 = 10.2 m
Therefore, the new values of discharge and head developed are 84.48 m^3/hr and 10.2 m, respectively.
Hence, the correct answer is option 'A': 84.48 m^3/hr and 10.2 m.
To solve this question, we need to apply the concept of affinity laws for centrifugal pumps. These laws allow us to calculate the changes in pump performance when the speed of the pump is changed.
**Affinity Laws:**
The affinity laws for centrifugal pumps are as follows:
1. Flow Rate (Q) is directly proportional to the pump speed (N).
2. Head (H) is directly proportional to the square of the pump speed (N^2).
3. Power (P) is directly proportional to the cube of the pump speed (N^3).
Using these laws, we can calculate the new values of flow rate and head when the speed of the pump is increased.
**Given Data:**
Efficiency of the pump = 80%
Discharge (Q) = 70 m^3/hr
Head (H) = 7 m
Speed (N) = 1450 rpm
Diameter = 2000 mm
**Step 1: Calculate the new flow rate**
Using the first affinity law, we can calculate the new flow rate (Q2) when the speed is increased to 1750 rpm.
(Q1/Q2) = (N1/N2)
(70/Q2) = (1450/1750)
Q2 = (70 * 1750) / 1450
Q2 = 84.48 m^3/hr
**Step 2: Calculate the new head**
Using the second affinity law, we can calculate the new head (H2) when the speed is increased to 1750 rpm.
(H1/H2) = (N1^2/N2^2)
(7/H2) = (1450^2/1750^2)
H2 = (7 * 1750^2) / 1450^2
H2 = 10.2 m
Therefore, the new values of discharge and head developed are 84.48 m^3/hr and 10.2 m, respectively.
Hence, the correct answer is option 'A': 84.48 m^3/hr and 10.2 m.
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Common Data QuestionA centrifugal pump has an efficiency of 80%. The specifications of the pump are:Discharge = 70 m3/hr, head = 7 m, speed = 1450 rmp and diameter = 2000 mm. If the speed of this pump is increased to 1750 rpm.Q.Discharge and head developed are given respectively:a)84.48 n m3/Hr and 10.2 mb)48.8 m3/Hr and 20 mc)48.8 m3/Hr and 10.2 md)58.4 m3/Hr and 12 mCorrect answer is option 'A'. Can you explain this answer?
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Common Data QuestionA centrifugal pump has an efficiency of 80%. The specifications of the pump are:Discharge = 70 m3/hr, head = 7 m, speed = 1450 rmp and diameter = 2000 mm. If the speed of this pump is increased to 1750 rpm.Q.Discharge and head developed are given respectively:a)84.48 n m3/Hr and 10.2 mb)48.8 m3/Hr and 20 mc)48.8 m3/Hr and 10.2 md)58.4 m3/Hr and 12 mCorrect 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 Common Data QuestionA centrifugal pump has an efficiency of 80%. The specifications of the pump are:Discharge = 70 m3/hr, head = 7 m, speed = 1450 rmp and diameter = 2000 mm. If the speed of this pump is increased to 1750 rpm.Q.Discharge and head developed are given respectively:a)84.48 n m3/Hr and 10.2 mb)48.8 m3/Hr and 20 mc)48.8 m3/Hr and 10.2 md)58.4 m3/Hr and 12 mCorrect 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 Common Data QuestionA centrifugal pump has an efficiency of 80%. The specifications of the pump are:Discharge = 70 m3/hr, head = 7 m, speed = 1450 rmp and diameter = 2000 mm. If the speed of this pump is increased to 1750 rpm.Q.Discharge and head developed are given respectively:a)84.48 n m3/Hr and 10.2 mb)48.8 m3/Hr and 20 mc)48.8 m3/Hr and 10.2 md)58.4 m3/Hr and 12 mCorrect answer is option 'A'. Can you explain this answer?.
Common Data QuestionA centrifugal pump has an efficiency of 80%. The specifications of the pump are:Discharge = 70 m3/hr, head = 7 m, speed = 1450 rmp and diameter = 2000 mm. If the speed of this pump is increased to 1750 rpm.Q.Discharge and head developed are given respectively:a)84.48 n m3/Hr and 10.2 mb)48.8 m3/Hr and 20 mc)48.8 m3/Hr and 10.2 md)58.4 m3/Hr and 12 mCorrect 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 Common Data QuestionA centrifugal pump has an efficiency of 80%. The specifications of the pump are:Discharge = 70 m3/hr, head = 7 m, speed = 1450 rmp and diameter = 2000 mm. If the speed of this pump is increased to 1750 rpm.Q.Discharge and head developed are given respectively:a)84.48 n m3/Hr and 10.2 mb)48.8 m3/Hr and 20 mc)48.8 m3/Hr and 10.2 md)58.4 m3/Hr and 12 mCorrect 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 Common Data QuestionA centrifugal pump has an efficiency of 80%. The specifications of the pump are:Discharge = 70 m3/hr, head = 7 m, speed = 1450 rmp and diameter = 2000 mm. If the speed of this pump is increased to 1750 rpm.Q.Discharge and head developed are given respectively:a)84.48 n m3/Hr and 10.2 mb)48.8 m3/Hr and 20 mc)48.8 m3/Hr and 10.2 md)58.4 m3/Hr and 12 mCorrect answer is option 'A'. Can you explain this answer?.
Solutions for Common Data QuestionA centrifugal pump has an efficiency of 80%. The specifications of the pump are:Discharge = 70 m3/hr, head = 7 m, speed = 1450 rmp and diameter = 2000 mm. If the speed of this pump is increased to 1750 rpm.Q.Discharge and head developed are given respectively:a)84.48 n m3/Hr and 10.2 mb)48.8 m3/Hr and 20 mc)48.8 m3/Hr and 10.2 md)58.4 m3/Hr and 12 mCorrect 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 Common Data QuestionA centrifugal pump has an efficiency of 80%. The specifications of the pump are:Discharge = 70 m3/hr, head = 7 m, speed = 1450 rmp and diameter = 2000 mm. If the speed of this pump is increased to 1750 rpm.Q.Discharge and head developed are given respectively:a)84.48 n m3/Hr and 10.2 mb)48.8 m3/Hr and 20 mc)48.8 m3/Hr and 10.2 md)58.4 m3/Hr and 12 mCorrect answer is option 'A'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
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