If the discharge of a centrifugal pump is throttled then its suction lift
- A. Decreases
- B. First increases and then decreases
- C. Remains unchanged
- D. Increases
Answer: D. Increases
Explanation: Throttling reduces discharge, which decreases friction losses in the suction pipe, thereby increasing the available Net Positive Suction Head (NPSH) and the allowable suction lift.