Ncert- science – class 7-Chapter 13 – Wastewater Story 2 Welcome to your Ncert- science – class 7-Chapter 13 – Wastewater Story 2 1. Atul is traveling from Mumbai to Nagpur by train, in between, he felt uneasy because None of the above. He was already sick. He used the properly sanitized public toilet. He used an improperly sanitized public toilet. None 2. Cooking oil should not be thrown down the drain because They do not allow free flow of oxygen. They do not allow bacteria to decompose waste. They block the drainage pipes. None 3. Sanitation at public places can be maintained by Garbage management. Sufficient public toilet facilities. Proper drainage. All of the above. None 4. A disease can spread from one person to population by Improper sanitation in home. Sharing of water bottle. Improper sanitation in public places. Sharing of food. None 5. The disease caused due to improper sanitation in public place is None of the above. Pandemic Endemic Non-communicable None 6. Pollution due to sewage can be reduced by Creating separate chemical toilets. Letting off drainage in rivers. Constructing septic tanks. Both Creating separate chemical toilets. AndConstructing septic tanks. None 7. Drains get blocked by : Chemicals and soil. Oil and chemicals. Oil and tea leaves. Chemicals and water. None 8. Which of the following happens when the garbage in dumped into the rivers? All of the above Water becomes unfit for drinking The inlets and ground water sources are blocked Fishes and water plants die None 9. Chlorine tablet is used to remove .......... from waste water. Bacteria Odour All of the above Dark colour None 10. In which of the following process, human excreta is completely converted to vermi cakes Sewage treatment Biogas production Vermi-processing toilets Vermicomposting None 11. What is the main cause of pollution of water in India? Both Discharge of untreated sewage and Discharge of industrial waste Bathing Discharge of untreated sewage Discharge of industrial waste None 12. Which of the following is associated with the vermi-processing toilets? Low water use toilet Kid's toilet Electronic toilet None of the above None 13. Black brown water that goes down the drain from sink is called as sewage water All of the above Wastewater Septic water None 14. Identify the best way to conserve water at home. All of the above Turn off tap while brushing teeth Installation of rain barrel Fixing leaky faucets None 15. The soil pores block and become ineffective in filtering the water due to Disposal of oil in open drain. None of the above. Disposal of oil in drainage pipe. Disposal of oil in garden. None Time's up Please Share This Share this content Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Opens in a new window Leave a Reply Cancel replyCommentEnter your name or username to commentEnter your email address to commentEnter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.
