【Daily Question: Pump Equipment】True or False Question, April 25, 2019

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bk12.jpg Rules for multiple-choice questions: 1. If both answers are incorrect, +2 wealth for active participation; if one answer is correct and the other is incorrect, +5 wealth; if both answers are correct, +8 wealth. 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. In vertical or submersible pumps equipped with separate bearing housings, when calculating the load on the rolling bearings, the weight of the rotor must be taken into account ( ) ； 2. When the medium enters the inlet of the impeller of a centrifugal pump (not an axial flow pump), it exerts an axial force on the impeller, known as dynamic reaction force. However, the AY centrifugal oil pump has an inlet and outlet arranged at the top, so there is no dynamic reaction force ( ). Answer: 1, Correct ； 2. Error