quiz1_f03

quiz1_f03 - Department of Chemical Engineering University...

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Department of Chemical Engineering University of California, Santa Barbara Ch.E. 152A Fall, 2003 QUIZ 1 Problem 1 (40 points) Nitrogen gas is used to purge a mixture of air and small amounts of a flammable vapor from a process vessel. The nitrogen is introduced continuously through an opening in the vessel and the resulting mixture is vented to the atmosphere through another opening. The capacity of the vessel is 10,000 L. If the nitrogen flow rate and the exit flow rate are both 0.5 m 3 /min, how long will it take to reduce the oxygen concentration to 2% by volume? You can assume that the initial vessel concentration is 100% air. State any additional assumptions that you make. Problem 2 (20 points) The transfer function that relates an output variable y and an input variable u is given by: () Ys a Us b s c = + a. What is the steady-state gain? b. Consider a step change of magnitude M in the input. Will the output response,
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This note was uploaded on 07/12/2009 for the course CHE 162A taught by Professor Seborg during the Fall '08 term at UCSB.

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quiz1_f03 - Department of Chemical Engineering University...

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