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English Translations » 炼制(催化焦化深加工) » Practice questions on June 3, 2017; replies will earn 0–6 po

Practice questions on June 3, 2017; replies will earn 0–6 points (no scoring for replies sent more than 1 day after posting). Thank you for your replies

2017-06-03View Original

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Single-choice question (no points awarded for wrong answers): The oil-water separation tank at the top of the pressure relief tower is generally equipped with an inverted U-shaped tube to prevent siphoning; the valve at the top of this tube should be (C). A. Shut off when water level is too high B. Shut off during normal operation C. Keep open during normal operation D. Shut off when oil level is too high. No scoring for replies given within 1 day of posting; thank you for your reply

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Translated at 2026-07-21 05:06:48

Original: https://bbs.hcbbs.com/thread-1785236-1-1.html

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