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  • Question
  • Ozone level is generally found to be depleted in India in the month of


  • Options
  • A. February
  • B. July
  • C. April
  • D. December

  • Correct Answer
  • December 


  • Environmental Engineering problems


    Search Results


    • 1. The concentration of water vapour in troposphere, which depends upon the altitude & temperature varies in the range of zero to __________ percent.

    • Options
    • A. 1
    • B. 4
    • C. 8
    • D. 12
    • Discuss
    • 2. 'Particulate' air pollutants are finely divided solids and liquids. Which of the following is not a 'particulate'?

    • Options
    • A. Dust & mists
    • B. Smoke & fumes
    • C. Photochemical smog & soot
    • D. None of these
    • Discuss
    • 3. Presence of bacteria in potable (drinking) water causes

    • Options
    • A. turbidity
    • B. disease
    • C. bad odour
    • D. bad taste & colour
    • Discuss
    • 4. Ambient noise level can be reduced by __________ decibels by planting trees (like coconut, neem etc.) near public utility buildings (like hospitals & schools).

    • Options
    • A. 1-2
    • B. 5-10
    • C. 15-20
    • D. 25-30
    • Discuss
    • 5. Thermal pollution of water increases its toxicity and oxidation of oxygen demanding waste besides favouring bacterial growth. A rise in water temperature by 10°C, doubles the toxic effects of __________ present in it.

    • Options
    • A. coal ash
    • B. potassium cyanide
    • C. ortho-xylene
    • D. none of these
    • Discuss
    • 6. Moist atmospheric air at high temperature (e.g., in summer) having high concentration of sulphur dioxide causes

    • Options
    • A. fading of dyes on textiles.
    • B. corrosion, tarnishing & soiling of metals.
    • C. reduced strength of textiles.
    • D. all (a), (b) and (c).
    • Discuss
    • 7. Dose of chlorine for disinfection of water is about __________ mg/litre of water.

    • Options
    • A. 0.01
    • B. 0.1
    • C. 0.3
    • D. 1
    • Discuss
    • 8. What are the methods of treatment & disposal of radioactive wastes?

    • Options
    • A. Evaporation & chemical precipitation.
    • B. Biological methods & adsorption in ion exchange materials.
    • C. Fixing into a solid mass with cement and sinking deep in the sea.
    • D. All (a), (b) & (c).
    • Discuss
    • 9. Particles having diameter greater than 75 ?m (micrometer = 10-6 mm) are called

    • Options
    • A. grit
    • B. dust
    • C. powder
    • D. smoke
    • Discuss
    • 10. Sound produced by an automobile horn heard at a distance of 1.5 metres corresponds to about __________ decibels.

    • Options
    • A. 90
    • B. 120
    • C. 150
    • D. 180
    • Discuss


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