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【Daily Question】Advanced Processing 20160528 Multiple Choice: Reasons for pump evacuation

2016-05-28View Original

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The centrifugal pump does not draw in fluid and produces no flow; the possible causes include: ① The pump is not filled with liquid at the time of startup; ④ The pump shaft rotates in the reverse direction; ② The suction pipeline is blocked or there is air leakage in the instruments; ⑤ Gas enters the pump; ③ The liquid level in the suction container is too low; ⑥ The check valve leaks. Which of these do you think could be the cause? A. ①, ③, ⑤ B. ②, ④, ⑥ C. None of them D. All of them Answer: D, All of them

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