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State PSC Environment & Ecology — practice questions — page 5

Explore 332 free Environment & Ecology questions in State PSC Environment. Open each question or exercise to read its content, reference answers and available explanation.

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Environment & Ecology questions and exercises with answers

Showing questions 121–150 of 332.

Type the numberRead the answer and worked solution →Organisms and populations bingoRead the answer and worked solution →A thermal power plant wants to remove over 99 per cent of particulate matter from its exhaust. It should install a:Read the answer and worked solution →A factory needs to remove sulphur dioxide from its exhaust. The device for this is a:Read the answer and worked solution →Which particulate size class does the Central Pollution Control Board blame for the greatest harm to health?Read the answer and worked solution →Catalytic converters in cars use which expensive metals as catalysts?Read the answer and worked solution →A car with a catalytic converter must use unleaded petrol because lead:Read the answer and worked solution →The Air (Prevention and Control of Pollution) Act was amended in 1987 to include:Read the answer and worked solution →A jet plane taking off can damage ear drums with a brief exposure to sound of:Read the answer and worked solution →Delhi converted its entire bus fleet to CNG by the end of:Read the answer and worked solution →The Water (Prevention and Control of Pollution) Act of India was passed in:Read the answer and worked solution →The amount of biodegradable organic matter in sewage is estimated by measuring:Read the answer and worked solution →Water hyacinth, the world's most problematic aquatic weed, is also called:Read the answer and worked solution →Heavy metals in industrial effluent are defined as elements with density greater than:Read the answer and worked solution →Starting at 0.003 ppb in water, DDT can reach what level in fish-eating birds?Read the answer and worked solution →High DDT in birds thins eggshells by disturbing the metabolism of:Read the answer and worked solution →The natural ageing of a lake by nutrient enrichment is called:Read the answer and worked solution →Arcata in California cleans its wastewater through a series of:Read the answer and worked solution →A fine powder of recycled modified plastic mixed with bitumen to lay roads is:Read the answer and worked solution →Ramesh Chandra Dagar of Sonipat is known for:Read the answer and worked solution →Without the greenhouse effect, the average surface temperature of Earth would be about:Read the answer and worked solution →The Montreal Protocol to control ozone-depleting substances was signed in:Read the answer and worked solution →The National Forest Policy of 1988 recommends what forest cover for the hills?Read the answer and worked solution →In 1974 the women of Garhwal hugged trees to stop contractors, in the movement called:Read the answer and worked solution →Catch the greenhouse gasesRead the answer and worked solution →Pop the water pollution wordsRead the answer and worked solution →Run the environmental yearsRead the answer and worked solution →Slice the pollution wordsRead the answer and worked solution →Air or waterRead the answer and worked solution →Sort the case studiesRead the answer and worked solution →

Worked practice questions

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Questions
  1. Answer
    99
    Question
    Per cent of animals that are conformers
  2. Answer
    1981
    Question
    Year India's human r value was 0.0205
  3. Answer
    25
    Question
    Per cent of insects that are phytophagous
  4. Answer
    10
    Question
    Species lost within a year when Pisaster was removed, more than
  5. Answer
    37
    Question
    Human body temperature in degrees Celsius
  6. Answer
    2
    Question
    Intermediate hosts of the human liver fluke
Instructions
Type the number only.
_Source: syllabus Biology, Chapter 13, Organisms and Populations._

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Organisms and populations bingo

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Clues and terms
  1. Clue
    Tolerates a wide temperature range.
    Item
    Eurythermal
  2. Clue
    Constant internal environment.
    Item
    Homeostasis
  3. Clue
    Winter sleep of bears.
    Item
    Hibernation
  4. Clue
    Summer dormancy of snails.
    Item
    Aestivation
  5. Clue
    Suspended development in zooplankton.
    Item
    Diapause
  6. Clue
    Births added to a population.
    Item
    Natality
  7. Clue
    Graph of age groups in a population.
    Item
    Age pyramid
  8. Clue
    One harmed, other unaffected.
    Item
    Amensalism
  9. Clue
    Fungus with plant roots.
    Item
    Mycorrhiza
Instructions
Read each clue and tap the term it describes.
_Source: syllabus Biology, Chapter 13, Organisms and Populations._

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A thermal power plant wants to remove over 99 per cent of particulate matter from its exhaust. It should install a:

  1. Electrostatic precipitator
  2. Wet scrubber for gases
  3. Three-way catalytic unit
  4. Sanitary landfill trench
Show answer and solution

Correct answer: A. Electrostatic precipitator

1. Electrode wires at several thousand volts produce a corona. 2. Charged dust is drawn to grounded plates. 3. This is the electrostatic precipitator. _Source: syllabus Biology, Chapter 16, Environmental Issues._

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