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Practice questions on April 12, 2017; replies will earn 2–6 points (no scoring after the (** symbol is displayed); thank you for your replies)

2017-04-12View Original

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Multiple-choice question: The color of the oil in line 2 turns black, while the colors of the oil in lines 1 and 3 remain unchanged; it can be determined that ( C ). A. High liquid level at the bottom of the tower B. Tower flooding C. Internal leakage in the constant-pressure secondary heat exchanger D. Leakage in the constant-pressure primary heat exchanger

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