【Daily Question: Pump Equipment】Fill-in-the-blank question, 3.2.2019

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This post was last edited by 3983596_FPPZ on 2019-3-2 at 14:29. Rules for the bk14.jpg fill-in-the-blank questions: 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 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 for responding is valid within 48 hours; no reward will be given if the deadline is exceeded. The student has won awards again; come by here every day. Under normal conditions (excluding abnormal situations such as dry running), the operational stability and service life of the sealing friction surfaces of mechanical seals (other than dry gas seals) are most significantly influenced by the performance parameters of ( ), ( ), and ( ) at those surfaces. Answer: Temperature, specific pressure (pressure), linear velocity — namely the PVT values commonly referred to