【Daily Question: Pump Equipment】Fill-in-the-blank question, 2019.2.18

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Rules for the fill-in-the-blank questions in bg2.png: 1. If both blanks are answered incorrectly, +2 wealth is awarded for active participation; if one blank is answered incorrectly and the other correctly, +5 wealth is given; if both blanks are answered correctly, +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 after that period. Studying* and winning awards again; come by here every day. Guide vanes come in two types: one type is used to collect the liquid flowing out of the impeller and direct it into the shell’s flow channels; this type is called ( ). The other type is used to direct the liquid within the flow channels to the inlet of the next stage of impellers; this type is called ( ). Answer: Forward guide vane, Reverse guide vane