【Pump Technology Edition: Daily Question】January 24, 2020 (Spring Festival bonus: 10 wealth points for those who answer correctly before the answers are revealed)

2020-01-25View Original

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83. For compressors whose compression medium is toxic or harmful, or which pose an explosion risk when mixed with air, ( ) replacement should be carried out before the compressor is put into normal operation. A. Carbon dioxide gas B. Nitrogen C. Oxygen. The answer to the question from yesterday was: B. 82. After slight wear of the mechanical seal’s end face, it can be repaired by (B) and then used again. A. Grinding B. Polishing after grinding C. Polishing (Answers are released the day before they are announced; those who get it right before the announcement receive 10 wealth points, those who get it right after the announcement receive 5 wealth points, and those who participate receive 3 wealth points.)

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【Pump Technology Edition: Daily Question】January 24, 2020 (Spring Festival bonus: 10 wealth points for those who answer correctly before the answers are revealed)

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