【Daily Question: Pump Equipment】Fill-in-the-blank question, April 22, 2019

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This post was last edited by 3983596_FPPZ on 2019-4-22 08:54, with bk12.jpg. Rules for fill-in-the-blank 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. If a sealing gasket is to be placed in the internal threaded hole M22x1.5 of a union fitting, what should be the approximate outer diameter of this sealing gasket in mm? 2. Among gear pumps, diaphragm pumps, plunger pumps, and screw pumps – these four types of positive displacement pumps – which one generates the greatest pressure difference? 20 ； Plunger pump