1.

An unsteady-state system, with 10 liters as initial amount of water in the vessel, water flow in rate is 8 liters/ s and flow out rate is 5 liters/s, what will be the amount of water in the vessel after 10 seconds?(a) 10 liters(b) 20 liters(c) 30 liters(d) 40 litersI have been asked this question during a job interview.The question is from Steady-State and Unsteady-State Systems topic in division Introduction to Material Balances of Basic Chemical Engineering

Answer»

The correct ANSWER is (d) 40 liters

The best I can explain: Amount of water ADDED to the VESSEL in 10 seconds = (8 – 5)*10 = 30 liters, => Final amount of water = 10 + 30 = 40 liters.



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