【Daily Question】Pump Equipment Technical Exchange Edition 20180417
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Participation: Prize 3 Wealth； Correct answer: Reward of 10 wealth points ； Note: A reward of 10 wealth points will be given for correct answers within 48 hours; this post is valid for 48 hours. Multiple-choice question: For water pumps of the same type with similar flow rates, the smaller the specific speed, ( ). A. The higher the head, B. The lower the head, C. The greater the shaft power, D. The smaller the shaft power. Correct answers: AC. In China, the specific speed is calculated as NS = 3.65·n·√q ÷ H^(3/4); with a constant flow rate, the lower the specific speed, the higher the head, and thus the greater the shaft power. https://attach01.hcbbs.com/forum/201801/05/235057wnwxbzxb311ikvvz.jpg.thumb.jpg
Pump Equipment Technical Exchange Version 20180417: For pumps with the same diameter and similar flow rates, the lower the rotational speed, the (AC). A. The higher the head, B. The lower the head, C. The greater the shaft power, D. The smaller the shaft power
B. The head is lower. D. The shaft power is smaller