【Daily Question: Pump Equipment】Fill-in-the-blank question, 3/23/2019

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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 grants +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. Compared to 304, 316 contains an additional ( ) element in its chemical composition ； 2. As the flow rate of the centrifugal pump increases, the flow velocity of the liquid inside the pump gradually ( ), the frictional losses caused by this flow velocity gradually ( ), the mechanical efficiency of the pump gradually ( ), and the overall efficiency of the pump as well. Answer: 1. Molybdenum (Mo) ； 2. Increase, increase, decrease, uncertain trend