मराठी

Which of the following is not a source of waste water?

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प्रश्न

Which of the following is not a source of waste water?

पर्याय

  • Sewers

  • Homes

  • Industries

  • Hospitals

MCQ
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उत्तर

Sewers

Explanation:

Sewers are the pipes through which wastewater generated from homes, industries and hospitals flows. They are not the source of wastewater.

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Wastewater Treatment Plant (WWTP)
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पाठ 18: Wastewater Story - MULTIPLE CHOICE QUESTIONS [पृष्ठ ९४]

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एनसीईआरटी एक्झांप्लर Science [English] Class 7
पाठ 18 Wastewater Story
MULTIPLE CHOICE QUESTIONS | Q 10. | पृष्ठ ९४

संबंधित प्रश्‍न

Dried ______ is used as manure.


Explain how sludge is treated.


Name two chemicals used to disinfect water.


Explain the function of bar screens in a wastewater treatment plant.


Which of the following is/are products of wastewater treatment?


State whether the following statement is True or False. In case a statement is false, write the correct statement.

Wastewater could be reused


State whether the following statement is True or False. In case a statement is false, write the correct statement.

Where underground sewerage systems and refuse disposal systems are not available, the high cost on-site sanitation system can be adopted


Given below is a jumbled sequence of the processes involved in a wastewater treatment plant. Arrange them in their correct sequence.

  1. Sludge is scraped out and skimmer removes the floating grease. 
  2. Water is made to settle in a large tank with a slope in the middle.
  3. Large objects like plastic bags are removed by passing wastewater through bar screens.
  4. Sand, grit and pebbles are made to settle by decreasing the speed of incoming wastewater.
  5. Wastewater enters a grit and sand removal tank.

Three statements are provided here which define the terms –

  1. sludge
  2. sewage and
  3. wastewater.

Pick out the correct definition for each of these terms.

  1. The settled solids are removed in wastewater treatment with a scraper.
  2. Water from the kitchen is used for washing dishes.
  3. Wastewater is released from homes, industries, hospitals and other public buildings.

Describe various steps of cleaning wastewater in a wastewater treatment plant.


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