Practice Unsteady State and Mass Balances - 2.3 | 9. Transport of Pollutants - Introduction | Environmental Quality Monitoring & Analysis, - Vol 3
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Knowledge

2.3 - Unsteady State and Mass Balances

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Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

Define unsteady state.

💡 Hint: Think about how concentrations behave in dynamic systems.

Question 2

Easy

What is a mass balance?

💡 Hint: Consider inputs, outputs, and changes in accumulation.

Practice 4 more questions and get performance evaluation

Interactive Quizzes

Engage in quick quizzes to reinforce what you've learned and check your comprehension.

Question 1

What is the key difference between unsteady state and steady state?

  • Unsteady state has constant concentrations
  • Unsteady state has changing concentrations
  • Both states have the same concentration

💡 Hint: Remember how systems vary over time.

Question 2

True or False: A mass balance looks at the rate of accumulation and the rate of loss.

  • True
  • False

💡 Hint: Think about how inputs and outputs affect overall mass.

Solve and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

If a river segment has an inflow of pollution at a concentration of 5 mg/L and outflow at 3 mg/L, calculate the net accumulation rate if the flow rate is 100 L/min.

💡 Hint: Use the mass balance principles you learned.

Question 2

Model a scenario in which a lake's concentration of a pollutant increases due to a chemical reaction producing it at a rate of 50 mg/day while evaporation removes 20 mg/day. If the lake volume is constant, determine the new concentration after one day.

💡 Hint: Consider using the mass balance formula for calculations.

Challenge and get performance evaluation