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Consider the following statements regarding the specific speed of acentrifugal pump:
1. Specific speed is defined as the speed of a geometrically similar pump developing unit power under unit head.
2. At the same specific speed, the efficiency is greater with largercapacity.
3. The specific speed increases with the increase in outer blade angle.
4. The specific speed varies directly as the square root of the pump discharge.
Of these statements:
1. Specific speed is defined as the speed of a geometrically similar pump developing unit power under unit head.
2. At the same specific speed, the efficiency is greater with largercapacity.
3. The specific speed increases with the increase in outer blade angle.
4. The specific speed varies directly as the square root of the pump discharge.
Of these statements:
- a)1 and 2 are correct
- b)2 and 4 are correct
- c)3 and 4 are correct
- d)2 and 3 are correct
Correct answer is option 'B'. Can you explain this answer?
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Verified Answer
Consider the following statements regarding the specific speed of acen...
Ans. (b) Specific speed is defined as the speed of a geometrically similar turbine
developing unit power under unit head. BUT specific speed of a pump is defined
as the speed of a geometrically similar pump of such a size that under corresponding conditions it would deliver unit volume flow of liquid against unit
head. That so why statement 1 is wrong.
developing unit power under unit head. BUT specific speed of a pump is defined
as the speed of a geometrically similar pump of such a size that under corresponding conditions it would deliver unit volume flow of liquid against unit
head. That so why statement 1 is wrong.
Most Upvoted Answer
Consider the following statements regarding the specific speed of acen...
Statement 1: Specific speed is defined as the speed of a geometrically similar pump developing unit power under unit head.
Specific speed is a dimensionless number that represents the speed at which a pump is operating. It is defined as the speed at which a geometrically similar pump would operate to deliver unit power under unit head. This means that if two pumps have the same specific speed, they are considered to be geometrically similar and will have similar performance characteristics.
Statement 2: At the same specific speed, the efficiency is greater with larger capacity.
This statement is incorrect. At the same specific speed, the efficiency of a centrifugal pump does not depend on the capacity (flow rate). Efficiency is primarily dependent on the design and operating conditions of the pump, such as impeller shape, size, and rotational speed. The capacity of the pump affects the flow rate but does not directly impact the efficiency.
Statement 3: The specific speed increases with the increase in outer blade angle.
This statement is incorrect. The specific speed of a centrifugal pump is determined by the impeller diameter, rotational speed, and head. The outer blade angle does not directly influence the specific speed. However, the outer blade angle does affect the pump's performance, including the flow rate, head, and efficiency.
Statement 4: The specific speed varies directly as the square root of the pump discharge.
This statement is correct. The specific speed (Ns) of a centrifugal pump is mathematically related to the pump discharge (Q) by the equation Ns = Q^0.5, where ^0.5 represents the square root. This means that as the pump discharge increases, the specific speed also increases. The specific speed is an indicator of the pump's operating characteristics and is commonly used in pump selection and design.
Based on the analysis of the statements, the correct answer is option B: 2 and 4 are correct.
Specific speed is a dimensionless number that represents the speed at which a pump is operating. It is defined as the speed at which a geometrically similar pump would operate to deliver unit power under unit head. This means that if two pumps have the same specific speed, they are considered to be geometrically similar and will have similar performance characteristics.
Statement 2: At the same specific speed, the efficiency is greater with larger capacity.
This statement is incorrect. At the same specific speed, the efficiency of a centrifugal pump does not depend on the capacity (flow rate). Efficiency is primarily dependent on the design and operating conditions of the pump, such as impeller shape, size, and rotational speed. The capacity of the pump affects the flow rate but does not directly impact the efficiency.
Statement 3: The specific speed increases with the increase in outer blade angle.
This statement is incorrect. The specific speed of a centrifugal pump is determined by the impeller diameter, rotational speed, and head. The outer blade angle does not directly influence the specific speed. However, the outer blade angle does affect the pump's performance, including the flow rate, head, and efficiency.
Statement 4: The specific speed varies directly as the square root of the pump discharge.
This statement is correct. The specific speed (Ns) of a centrifugal pump is mathematically related to the pump discharge (Q) by the equation Ns = Q^0.5, where ^0.5 represents the square root. This means that as the pump discharge increases, the specific speed also increases. The specific speed is an indicator of the pump's operating characteristics and is commonly used in pump selection and design.
Based on the analysis of the statements, the correct answer is option B: 2 and 4 are correct.
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Consider the following statements regarding the specific speed of acentrifugal pump:1. Specific speed is defined as the speed of a geometrically similar pump developing unit power under unit head.2. At the same specific speed, the efficiency is greater with largercapacity.3. The specific speed increases with the increase in outer blade angle.4. The specific speed varies directly as the square root of the pump discharge.Of these statements:a)1 and 2 are correctb)2 and 4 are correctc)3 and 4 are correctd)2 and 3 are correctCorrect answer is option 'B'. Can you explain this answer?
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Consider the following statements regarding the specific speed of acentrifugal pump:1. Specific speed is defined as the speed of a geometrically similar pump developing unit power under unit head.2. At the same specific speed, the efficiency is greater with largercapacity.3. The specific speed increases with the increase in outer blade angle.4. The specific speed varies directly as the square root of the pump discharge.Of these statements:a)1 and 2 are correctb)2 and 4 are correctc)3 and 4 are correctd)2 and 3 are correctCorrect answer is option 'B'. 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 Consider the following statements regarding the specific speed of acentrifugal pump:1. Specific speed is defined as the speed of a geometrically similar pump developing unit power under unit head.2. At the same specific speed, the efficiency is greater with largercapacity.3. The specific speed increases with the increase in outer blade angle.4. The specific speed varies directly as the square root of the pump discharge.Of these statements:a)1 and 2 are correctb)2 and 4 are correctc)3 and 4 are correctd)2 and 3 are correctCorrect answer is option 'B'. 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 Consider the following statements regarding the specific speed of acentrifugal pump:1. Specific speed is defined as the speed of a geometrically similar pump developing unit power under unit head.2. At the same specific speed, the efficiency is greater with largercapacity.3. The specific speed increases with the increase in outer blade angle.4. The specific speed varies directly as the square root of the pump discharge.Of these statements:a)1 and 2 are correctb)2 and 4 are correctc)3 and 4 are correctd)2 and 3 are correctCorrect answer is option 'B'. Can you explain this answer?.
Consider the following statements regarding the specific speed of acentrifugal pump:1. Specific speed is defined as the speed of a geometrically similar pump developing unit power under unit head.2. At the same specific speed, the efficiency is greater with largercapacity.3. The specific speed increases with the increase in outer blade angle.4. The specific speed varies directly as the square root of the pump discharge.Of these statements:a)1 and 2 are correctb)2 and 4 are correctc)3 and 4 are correctd)2 and 3 are correctCorrect answer is option 'B'. 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 Consider the following statements regarding the specific speed of acentrifugal pump:1. Specific speed is defined as the speed of a geometrically similar pump developing unit power under unit head.2. At the same specific speed, the efficiency is greater with largercapacity.3. The specific speed increases with the increase in outer blade angle.4. The specific speed varies directly as the square root of the pump discharge.Of these statements:a)1 and 2 are correctb)2 and 4 are correctc)3 and 4 are correctd)2 and 3 are correctCorrect answer is option 'B'. 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 Consider the following statements regarding the specific speed of acentrifugal pump:1. Specific speed is defined as the speed of a geometrically similar pump developing unit power under unit head.2. At the same specific speed, the efficiency is greater with largercapacity.3. The specific speed increases with the increase in outer blade angle.4. The specific speed varies directly as the square root of the pump discharge.Of these statements:a)1 and 2 are correctb)2 and 4 are correctc)3 and 4 are correctd)2 and 3 are correctCorrect answer is option 'B'. Can you explain this answer?.
Solutions for Consider the following statements regarding the specific speed of acentrifugal pump:1. Specific speed is defined as the speed of a geometrically similar pump developing unit power under unit head.2. At the same specific speed, the efficiency is greater with largercapacity.3. The specific speed increases with the increase in outer blade angle.4. The specific speed varies directly as the square root of the pump discharge.Of these statements:a)1 and 2 are correctb)2 and 4 are correctc)3 and 4 are correctd)2 and 3 are correctCorrect answer is option 'B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Mechanical Engineering.
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Consider the following statements regarding the specific speed of acentrifugal pump:1. Specific speed is defined as the speed of a geometrically similar pump developing unit power under unit head.2. At the same specific speed, the efficiency is greater with largercapacity.3. The specific speed increases with the increase in outer blade angle.4. The specific speed varies directly as the square root of the pump discharge.Of these statements:a)1 and 2 are correctb)2 and 4 are correctc)3 and 4 are correctd)2 and 3 are correctCorrect answer is option 'B'. Can you explain this answer?, a detailed solution for Consider the following statements regarding the specific speed of acentrifugal pump:1. Specific speed is defined as the speed of a geometrically similar pump developing unit power under unit head.2. At the same specific speed, the efficiency is greater with largercapacity.3. The specific speed increases with the increase in outer blade angle.4. The specific speed varies directly as the square root of the pump discharge.Of these statements:a)1 and 2 are correctb)2 and 4 are correctc)3 and 4 are correctd)2 and 3 are correctCorrect answer is option 'B'. Can you explain this answer? has been provided alongside types of Consider the following statements regarding the specific speed of acentrifugal pump:1. Specific speed is defined as the speed of a geometrically similar pump developing unit power under unit head.2. At the same specific speed, the efficiency is greater with largercapacity.3. The specific speed increases with the increase in outer blade angle.4. The specific speed varies directly as the square root of the pump discharge.Of these statements:a)1 and 2 are correctb)2 and 4 are correctc)3 and 4 are correctd)2 and 3 are correctCorrect answer is option 'B'. Can you explain this answer? theory, EduRev gives you an
ample number of questions to practice Consider the following statements regarding the specific speed of acentrifugal pump:1. Specific speed is defined as the speed of a geometrically similar pump developing unit power under unit head.2. At the same specific speed, the efficiency is greater with largercapacity.3. The specific speed increases with the increase in outer blade angle.4. The specific speed varies directly as the square root of the pump discharge.Of these statements:a)1 and 2 are correctb)2 and 4 are correctc)3 and 4 are correctd)2 and 3 are correctCorrect answer is option 'B'. Can you explain this answer? tests, examples and also practice Mechanical Engineering tests.
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