This quiz works best with JavaScript enabled. Home > Cbse > Class 7 > Science > Wastewater Story > Class 7 Science Chapter 13 Wastewater Story – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 7 Science Chapter 13 Wastewater Story Quiz 3 (5 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the quality is of a wastewater? A) Foul smell. B) Bad taste. C) Dirty look. D) All the above. Show Answer Correct Answer: D) All the above. 2. The following are sources of industrial wastewater, EXCEPT: A) Landfill. B) Resident Building. C) Factories Building. D) Refinery Plant. Show Answer Correct Answer: B) Resident Building. 3. THE PERIOD PROCLAIMED BY UNITED NATIONS AS THE INTERNATIONAL DECADE FOR ACTION ON "WATER FOR LIFE" A) 2005-2015. B) 1990-2000. C) 2006-2016. D) 1864-1874. Show Answer Correct Answer: A) 2005-2015. 4. The steps used in wastewater treatment is (are): A) Chlorination. B) Aeration. C) Filtration. D) All the above. Show Answer Correct Answer: D) All the above. 5. True Or FalseCooking oil and fats should not be thrown down the drain because they can harden and block the pipes. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. ← PreviousRelated QuizzesScience QuizzesClass 7 QuizzesClass 7 Science Chapter 13 Wastewater Story Quiz 1Class 7 Science Chapter 13 Wastewater Story Quiz 2 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books