【Daily Question】Pump Equipment Technical Exchange Edition 20180108
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Participation: Prize 2 Wealth； Correct answer: Reward of 5 wealth points ； Note: Correct answers within 48 hours earn 5 wealth points; this post is valid for 48 hours. Multiple-choice question: When the speed of a centrifugal pump decreases (). A. Flow rate decreases B. Effective net positive suction head increases C. Required net positive suction head decreases D. A, B, and C. Correct answer: D. A. The flow rate is proportional to the speed. B. When the flow rate decreases, the flow velocity inside the suction pipe also decreases, thereby increasing the effective net positive suction head. C. The required NPSH of the pump decreases after speed reduction. https://attach01.hcbbs.com/forum/201801/05/235057wnwxbzxb311ikvvz.jpg.thumb.jpg
When the centrifugal pump speed decreases (D). A. Reduced flow rate B. Increased net positive suction head Buhler C. Decreased required net positive suction head D. A, B, and C
Multiple-choice question: When the speed of a centrifugal pump decreases (D). A. Reduced flow rate B. Increased net positive suction head Buhler C. Decreased required net positive suction head D. A, B, and C
AC...........................