Which of the following criteria should be considered while selecting a centrifugal pump? i. Head ii. Discharge iii. Efficiency
- AOnly (i)
- BOnly (i) and (ii)
- COnly (ii) and (iii)
- D(i), (ii) and (iii)Correct
Solution
Concept
Centrifugal pump selection criteria
Formula
NONE
Step-by-step solution
1. Selection of a centrifugal pump depends on key operating requirements of the system. 2. Design head and required discharge rate are primary operating parameters considered during pump selection. Answer: D
Explanation
Selecting the right centrifugal pump requires evaluating the required delivery height or head, the required volume flow rate or discharge, and the operating efficiency. Considering all three factors ensures optimal performance and prevents premature wear or energy waste. Therefore, option D is the correct choice.
Why the other options are wrong
A) Head is not the only criterion as discharge must also be considered. C) Head must be considered alongside discharge.
Shortcut
Centrifugal pump selection depends on all three parameters: Head, Discharge, and Efficiency.
Common mistake
Selecting option B by considering only head and discharge while neglecting efficiency as a selection criterion.
Correct answer: D) (i), (ii) and (iii)