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UPSC CDS Indian Society — practice questions

Explore 30 free Indian Society questions in UPSC CDS Environment. Open each question or exercise to read its content, reference answers and available explanation.

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Indian Society questions and exercises with answers

Showing questions 1–30 of 30.

Used water rich in lather, oil and dirt going down drains from sinks and toilets is called:Read the answer and worked solution →More than how many people worldwide have no access to safe drinking water?Read the answer and worked solution →The UN proclaimed 2005-2015 as the International Decade for action on:Read the answer and worked solution →Wastewater released by homes, industries, hospitals and offices, including storm runoff, is:Read the answer and worked solution →Vibrio cholerae and Salmonella paratyphi in sewage cause cholera and:Read the answer and worked solution →The network of big and small pipes carrying sewage to a treatment plant is the:Read the answer and worked solution →Manholes in a sewerage system are located every:Read the answer and worked solution →The first step at a wastewater treatment plant removes rags, sticks and cans using:Read the answer and worked solution →In the grit and sand removal tank, the speed of incoming wastewater is decreased so that:Read the answer and worked solution →Solids like faeces that settle at the bottom of the clarifier tank are called:Read the answer and worked solution →The device that removes floatable solids like oil and grease from wastewater is a:Read the answer and worked solution →Sludge in a separate tank is decomposed by anaerobic bacteria, producing:Read the answer and worked solution →Air is pumped into clarified water to help which bacteria grow and eat remaining waste?Read the answer and worked solution →Activated sludge is about what share water?Read the answer and worked solution →Dried sludge from a treatment plant is used as:Read the answer and worked solution →Treated water may be disinfected before release with chlorine and:Read the answer and worked solution →Which trees planted along sewage ponds absorb surplus wastewater and release pure vapour?Read the answer and worked solution →Cooking oil and fats should not go down the drain because they:Read the answer and worked solution →Swachh Bharat, the mission for sewage disposal and toilets for all, began in:Read the answer and worked solution →A vermi-processing toilet treats human excreta using:Read the answer and worked solution →Groundwater polluted by open defecation becomes the most common route for:Read the answer and worked solution →Septic tanks are suitable for hospitals, isolated buildings or a cluster of how many houses?Read the answer and worked solution →Catch the treatment stepsRead the answer and worked solution →Pop the water borne diseasesRead the answer and worked solution →Run the treatment plantRead the answer and worked solution →Slice the sewage wordsRead the answer and worked solution →Organic or inorganic impurityRead the answer and worked solution →Sort the treatment processesRead the answer and worked solution →Type the numberRead the answer and worked solution →Wastewater bingoRead the answer and worked solution →

Worked practice questions

Used water rich in lather, oil and dirt going down drains from sinks and toilets is called:

  1. Wastewater
  2. Rainwater
  3. Groundwater
  4. Fresh water
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Correct answer: A. Wastewater

1. It should not be wasted. 2. This used water is wastewater. 3. Pollutants are removed by treatment. _Source: syllabus Science, Chapter 18, Wastewater Story._

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More than how many people worldwide have no access to safe drinking water?

  1. Ten billion
  2. One billion
  3. One million
  4. Ten million
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Correct answer: B. One billion

1. This causes many water-related diseases. 2. Over one billion lack safe water. 3. Children walk kilometres to fetch it. _Source: syllabus Science, Chapter 18, Wastewater Story._

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The UN proclaimed 2005-2015 as the International Decade for action on:

  1. Water for life
  2. Clean air now
  3. Green earth day
  4. Safe soil plan
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Correct answer: A. Water for life

1. It was proclaimed on World Water Day, 22 March 2005. 2. The theme was Water for life. 3. The aim was to halve those without safe water. _Source: syllabus Science, Chapter 18, Wastewater Story._

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