Basic Process Knowledge (Multiple Choice) 20180705
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This post was last edited by HP0377 on 2018-7-5 07:27. Basic Process Knowledge (Multiple Choice) 20180705: Which of the following situations will result in a decrease in the suction pressure of the pump? A. Decrease in the temperature of the suction water B. Increase in the temperature of the suction lubricating oil C. Increase in the pump speed D. Decrease in the vacuum level in the suction tank. Hint: An increase in pump speed leads to an increase in flow rate, as well as an increase in the flow resistance in the suction pipe.
D. Decrease in vacuum level of the inhalation container
As the temperature of B and C increases, the saturated vapor pressure rises, and the liquid density decreases; all these factors lead to a decrease in the suction pressure. This results in an increase in rotational speed and flow rate, as well as an increase in pipeline resistance, which further contributes to a decrease in the suction pressure
THE ANSWER IS C