One question per day; those who answer correctly receive 6 wealth points, while participants receive 2 wealth points； August 29th
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Single-choice question: When the acetylene generator discharges slag, the liquid level and pressure inside the generator temporarily ( ). At this time, feeding material into the generator will ( ) the load on the upper few rows of rake teeth, causing large fluctuations in the generator’s pressure; this makes it easier for calcium carbide to be discharged, which is not conducive to safe production. Therefore, feeding must be stopped while the generator is discharging slag. A. Rising, increasing B. Falling, increasing C. Rising, decreasing D. Falling, decreasing Answer: B, Falling, increasing
When the acetylene generator discharges slag, the liquid level and pressure inside the generator temporarily (B). At this time, feeding material into the generator will (B) the load on the upper few rows of rake teeth, causing large fluctuations in the generator’s pressure; this makes it easier for calcium carbide to be discharged, which is not conducive to safe production. Therefore, feeding must be stopped while the generator is discharging slag. A、Rise, increase B、Fall, increase C、Rise, decrease D、Fall, decrease
When the acetylene generator discharges slag, the liquid level and pressure inside the generator temporarily (B). At this time, feeding material into the generator will increase the load on the upper few rows of rake teeth, resulting in large pressure fluctuations in the generator. This makes it easier for calcium carbide to be discharged, which is not conducive to safe production; therefore, feeding must be stopped during slag discharge. A、Rise, increase B、Fall, increase C、Rise, decrease D、Fall, decrease