The maximum permissible suction lift for centrifugal pump in practice is
- A20 feetCorrect
- B32 feet
- C40 feet
- D49 feet
Solution
Concept
Practical suction lift
Step-by-step solution
1. Theoretically the suction lift is limited to about 10.3 m of water, but cavitation and losses reduce it. 2. In practice about 6 m (20 feet) is the maximum.
Explanation
Atmospheric pressure, vapour pressure and friction losses limit the practical lift.
Why the other options are wrong
32–49 feet exceed the practical value.
Shortcut
Practical suction lift ≈ 6 m ≈ 20 ft.
Correct answer: A) 20 feet