Practice questions on May 4, 2017; replies will earn 2–6 points (no scoring after the answers are shown, thank you for your replies)
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This post was last edited by percy on 2017-5-3 19:29. Before switching the single-choice unit from open-loop operation to closed-loop circulation, the most appropriate action is (C). A. The liquid levels in the three towers should be controlled at the values corresponding to normal production conditions. B. The liquid levels in the three towers should be controlled slightly below the values corresponding to normal production conditions. C. The liquid levels in the three towers should be controlled slightly above the values corresponding to normal production conditions. D. The liquid levels in the three towers should be kept as low as possible
Before switching the unit from open-loop to closed-loop operation, the most appropriate approach is (B). A. Control the liquid levels in the three towers at the values typical for normal production. B. Control the liquid levels in the three towers slightly below the values typical for normal production. C. Control the liquid levels in the three towers slightly above the values typical for normal production. D. Try to keep the liquid levels in the three towers as low as possible