Centrifugal Pumps — General Characteristics Which of the following statements about centrifugal pumps is correct?
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AThe centrifugal pump is suitable for large discharge and smaller heads.
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BThe centrifugal pump requires less floor area and simple foundation as compared to reciprocating pump.
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CThe efficiency of centrifugal pump is less as compared to reciprocating pump.
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Dall of the above
Answer
Correct Answer: all of the above
Explanation
Introduction:Centrifugal pumps dominate water supply and process services because they handle large flows smoothly and compactly. Comparing them with reciprocating pumps clarifies typical application domains and performance differences.
Given Data / Assumptions:
- Standard single-stage centrifugal pump at its best efficiency region.
- Conventional single-acting reciprocating pump for comparison.
- Water-like liquids; steady-state operation assumptions.
Concept / Approach:Centrifugal pumps produce head through dynamic action and are best for moderate to low head with large discharge. They are compact, need simpler foundations, and deliver near-pulsation-free flow. Reciprocating pumps excel at high heads and low flows with higher mechanical efficiency but require heavier foundations and produce pulsating discharge.
Step-by-Step Solution:Relate flow/head domain: centrifugal → large Q, small–moderate H.Assess installation: centrifugal → smaller footprint, simpler baseplate.Compare efficiencies: reciprocating often higher peak efficiency; centrifugal lower but adequate and more practical for big Q.
Verification / Alternative check:Industry selection charts and textbooks state these comparative traits consistently.
Why Other Options Are Wrong:Each individual statement a–c is true; therefore “all of the above” is the most complete correct choice.
Common Pitfalls:Assuming centrifugal pumps are always more efficient; at very low flow/high head, reciprocating machines may win.
Final Answer:all of the above