Practice **questions on February 16, 2017; replies will earn 2–6 points (** no scoring after it is displayed, thank you for your replies)
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Multiple-choice question 1: Other conditions remaining unchanged, when the properties of crude oil become heavier, the ( ) of the atmospheric distillation tower. A. Increase in top pressure of the tower B. Decrease in top pressure of the tower C. Decrease in the liquid level at the bottom of the tower D. Increase in the liquid level at the bottom of the tower Answer: B, D
With all other conditions unchanged, as the properties of crude oil become heavier, the (B D) of the initial distillation tower increases. A. Pressure at the top of the tower increases B. Pressure at the top of the tower decreases C. Liquid level at the bottom of the tower decreases D. Liquid level at the bottom of the tower increases
B. Pressure at the top of the tower decreases D. Liquid level at the bottom of the tower rises
B. Pressure at the top of the tower decreases D. Liquid level at the bottom of the tower rises