Lakhmir Singh and Manjit Kaur Solutions for Chapter: Wastewater Story, Exercise 5: Questions Based on High Order Thinking Skills (HOTS)
Lakhmir Singh Science Solutions for Exercise - Lakhmir Singh and Manjit Kaur Solutions for Chapter: Wastewater Story, Exercise 5: Questions Based on High Order Thinking Skills (HOTS)
Attempt the practice questions on Chapter 18: Wastewater Story, Exercise 5: Questions Based on High Order Thinking Skills (HOTS) with hints and solutions to strengthen your understanding. AWARENESS SCIENCE for Seventh Class solutions are prepared by Experienced Embibe Experts.
Questions from Lakhmir Singh and Manjit Kaur Solutions for Chapter: Wastewater Story, Exercise 5: Questions Based on High Order Thinking Skills (HOTS) with Hints & Solutions
A sewage treatment plant involves the following steps in its working:
Aeration tank, Grit and sand removal tank, Second sedimentation tank, Bar screen, First sedimentation tank
(a) Arrange all the above steps in the correct order in which they occur in the sewage treatment plant.
(b) Which step gives most of the sludge which is used for obtaining biogas fuel?
Some of the alternative sewage disposal systems for human waste are given below:
Chemical toilets, Composting toilets, Vacuum toilets, Septic tank toilets, Vermi-processing toilets
(a) Which of these toilets provide high quality manure?
(b) Which of these toilets are used in aeroplanes?
(c) Which of these toilets are used at outdoor gatherings like marriages?
(d) Which of these toilets are used where water supply is limited or not available at all?
(e) Which of these toilets is most likely to contaminate water of a hand-pump installed nearby?
