Professional Courses
Industry-relevant training in Business, Technology, and Design to help professionals and graduates upskill for real-world careers.
Categories
Interactive Games
Fun, engaging games to boost memory, math fluency, typing speed, and English skills—perfect for learners of all ages.
Typing
Memory
Math
English Adventures
Knowledge
Enroll to start learning
You’ve not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does BOD stand for?
💡 Hint: Think about organic matter and oxygen consumption.
Question 2
Easy
True or False: COD measures only biodegradable organic matter.
💡 Hint: Remember what COD stands for.
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 primary measure of BOD?
- Amount of chemical oxygen
- Amount of organic matter
- Amount of nutrients
💡 Hint: Focus on what BOD specifically indicates.
Question 2
True or False: BOD is a direct measure of organic compounds in water.
- True
- False
💡 Hint: Consider how BOD is derived.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
You have a BOD sample with an initial DO of 8.0 mg/L and final DO of 3.0 mg/L after 5 days. Calculate the BOD. Also, explain any potential errors in measurement.
💡 Hint: Review temperature standards for BOD measurements.
Question 2
A water sample has a COD of 100 mg/L, and the BOD is 30 mg/L. Discuss the implications of these values in terms of water quality.
💡 Hint: Think about the meaning of high COD versus BOD values.
Challenge and get performance evaluation