Practice Chemical Oxygen Demand (COD) - 1 | 7. Chemical Oxygen Demand (COD) | Environmental Quality Monitoring & Analysis, - Vol 2
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Knowledge

1 - Chemical Oxygen Demand (COD)

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Learning

Practice Questions

Test your understanding with targeted questions related to the topic.

Question 1

Easy

What does COD stand for?

💡 Hint: Think about what we measure concerning oxygen and water.

Question 2

Easy

Is COD dependent on biological processes?

💡 Hint: Consider the method used in COD testing.

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 does COD measure?

  • Only biological material
  • All organic and inorganic oxidizable materials
  • Only carbon content

💡 Hint: Remember what type of materials are oxidized.

Question 2

True or False: COD results can be affected by other chemicals in the water.

  • True
  • False

💡 Hint: Consider the interactions in the test environment.

Solve and get performance evaluation

Challenge Problems

Push your limits with challenges.

Question 1

A wastewater sample shows a COD of 200 mg/L. Upon testing, you find that there are significant levels of sulfides present in the sample. How would you interpret the COD result, and what steps would you recommend to ensure reliability in your assessment?

💡 Hint: Consider the nature of interfering substances and how they could distort your findings.

Question 2

Discuss how the methodology for measuring COD could be adapted to improve accuracy in cases where interferences are suspected. Consider additional testing regimens or alternative methods.

💡 Hint: Think outside the box about how to handle multiple variables influencing COD results.

Challenge and get performance evaluation