【Daily Question: Pump Equipment】Fill-in-the-blank question, 3/25/2019

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bk14.jpg Rules for fill-in-the-blank questions: 1. If both answers are incorrect, +2 wealth is awarded for active participation; if one answer is correct and the other is incorrect, +5 wealth is given; if both answers are correct, +8 wealth is awarded. 2. If only one answer is provided, unless it is clear which question’s answer it is, a correct answer earns +5 wealth points, while an incorrect answer earns +2 wealth points; in all other cases, it is counted as active participation and awards +2 wealth points. 3. Rewards for answers are available once per person only. 4. Each reply allows scoring for only one person. 5. The answer and its explanation will be visible after responding. 6. The reward is valid for 48 hours; no reward will be given if the deadline is exceeded. Studying* and winning awards again; come by here every day. 1. The impeller of a centrifugal pump with twisted blades – when viewed from the inlet side of the impeller, the blades should appear as ( ) ； 2. The greater the axial clearance on both sides of the vortex pump impeller (), the higher the pump’s head can be. Answer: 1. Back side ； 2. The smaller, the better ；