Fundamentals of Manufacturing Processes (Multiple Choice) 20180114
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As the reciprocating pump operates for a long time, the amount of air discharged from the air chamber will increase. A. Increase B. Decrease C. Remain unchanged D. Vary depending on the properties of the liquid. Hint: The liquid pressure in the air discharge chamber increases compared to the pressure at the liquid surface, which enhances the ability to dissolve air; as a result, the air in the air discharge chamber gradually dissolves into the liquid.
As the reciprocating pump operates for a long time, the amount of air discharged from the air chamber will increase. A. Increase B. Decrease C. Remain unchanged D. Vary depending on the properties of the liquid
B~The amount of air inhaled has no direct relationship with the pump’s operating time. However, over time the temperature of the pump increases, causing the gas to expand due to this rise in temperature; as a result, the amount of air drawn into the cylinder decreases, and the total volume of air discharged becomes smaller after it cools down.