【Purification Daily Question】June 19, 2016

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To increase the popularity of the purified area, a \"One Question per Day\" campaign was launched to foster an active atmosphere for technical exchanges while also providing members with financial rewards. (Fellow sailors, if you have any good questions, feel free to send them to me; let’s work together.) 【Daily Question】 What should be done first in a device’s airtightness test? A. Test head B. Valve C. Tester’s manhole D. Confirmation process. Reply with your answers; participating in the quiz earns you +2 wealth points. Getting all answers correct adds another +3 to +8 wealth points. Those who provide thorough analyses and explanations for the questions or answers (including detailed calculation processes) will receive additional wealth rewards. If your answers are correct and your analysis and explanations are accurate, your reply will be marked as the best response (or the best assistance). Feel free to answer the questions. D