One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； May 21st
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Single-choice question: When the pressure in an acetylene generator produced by the calcium carbide method rises suddenly, the acetylene is discharged automatically； When the generator pressure drops, C2H2 in the gas holder enters the generator to maintain a positive pressure there. A. Safety water seal, forward water seal B. Safety water seal, reverse water seal C. Drainage pipe, forward water seal D. Drainage pipe, reverse water seal Answer: B. Safety water seal, reverse water seal
When the pressure in an acetylene generator made by the calcium carbide method rises suddenly, acetylene is automatically vented through a safety water seal； When the generator pressure drops, C2H2 in the gas tank enters the generator through the reverse water seal to maintain positive pressure in the generator. A. Safety water seal, forward water seal B. Safety water seal, reverse water seal C. Drainage pipe, forward water seal D. Drainage pipe, reverse water seal