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[Daily Question] Basic Process Knowledge (Multiple Choice) 20191025

2019-10-25View Original

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The centrifugal pump fails to deliver flow and remains empty; 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 instrumentation; ⑤ Gas gets into the pump; ③ The liquid level in the suction container is too low; ⑥ The check valve leaks. You think the likely cause is (D). A.①, ③, ⑤ C. None of them B.②, ④, ⑥ D. All of them

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