Chapter-18 ➤ Wastewater Story 1. Wastewater cannot be reused. True False 2. Which of the following is/are products of wastewater treatment? Biogas Sludge Both Biogas and sludge Aerator 3. Which one of the following is a quality of wastewater? Foul smell Bad taste Dirty look All of these 4. Which one of the following is used in vermi-processing toilet? Earthworm Cockroach Both of these None of these 5. Sludge in separate tanks is decomposed to get biogas by yeasts aerobic bacteria anaerobic bacteria none of these 6. Treatment plants reduce pollutants in wastewater to a level where nature can take care of it. True False 7. Sewage is mainly a liquid waste Solid waste gaseous waste Mixture of solid and gas 8. Cooking oil and fats should not be thrown down the drain because they can harden and block the pipes. True False 9. Open drain system is a breeding place for which of the following: Files Mosquitoes Organisms which cause diseases All of these 10. Period 2005-2015 is being celebrated as the international decade for action on water for life education for all global war terrorism Loading … Question 1 of 10
