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【Pump Technology Edition Daily Question】(December 31, 2019) A reward of 5 Wealth points for correct answers

2019-12-31View Original

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【Pump Technology Edition: Daily Question】 59. Which formula should be used to calculate the pitch circle diameter of an involute cylindrical helical tooth? () A. d = mz B. d = MnZ/cosβ C. d = MtZ (Date: XX, 20XX) The answer is revealed the day before it is announced; those who get it right receive 5 wealth points, while those who participate receive 1 wealth point. The answer to yesterday’s question was B. 58. The noise that occurs in a compressor bearing is mainly due to the fit between the bearing and the shaft journal (). A. Gap too small B. Gap too large C. Appropriate gap One day before publication

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