Environmental Engineering Degree Questions & Answers - Set 10 - ObjectiveBooks
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Environmental Engineering Degree Questions & Answers - Set 10

Practice Test: Question Set - 10


1. Which of the following sources is responsible for maximum air pollution?
    (A) Industrial chimney exhaust
    (B) Forest fire
    (C) Automobiles exhaust
    (D) Photochemical oxidation of organic matter

2. As per the world health organization (WHO) specification, the maximum permissible concentration (i.e., TLV) of particulate matter in air is __________ μg/m3.(μg-microgram)
    (A) 10
    (B) 90
    (C) 800
    (D) 750

3. Water filtration rate in a rapid sand filter ranges from __________ kiloliters/m2/hr.
    (A) 0.1 to 1
    (B) 3 to 6
    (C) 10 to 15
    (D) 15 to 20

4. Presence of __________ bacteria in water causes disease like typhoid.
    (A) Aerobic
    (B) Pathogenic
    (C) Anaerobic
    (D) Non-pathogenic

5. Oceans act as sinks for atmospheric gases including carbon dioxide whose concentration in the atmosphere is increased by the
    (A) Forestation
    (B) Rain
    (C) Green house effect
    (D) Vegetation

6. In large thermal power stations very fine particulates present in flue gas are removed by
    (A) Wet scrubber
    (B) Bag filter
    (C) Electrostatic precipitators
    (D) Dust catcher

7. Sooty and sulphurous smog formed due to combustion of fossil fuels particularly in winter, continues throughout the day and night. When the moist atmospheric air's water vapor condenses on the solid particles of smoke thereby forming smog (smoke + fog), it causes
    (A) Poor visibility due to sky darkening
    (B) Irritation in eyes
    (C) Respiratory trouble
    (D) All (a), (b) and (c)

8. Which of the following is the most lethal water pollutant?
    (A) Phenol and cyanide
    (B) Chlorine
    (C) Alkalis
    (D) Suspended solids

9. Hazardous/polluting chemical industries should have an 'exclusion zone' with a green belt and general public access prohibited around it, covering a radius of __________ meters.
    (A) 100
    (B) 1000
    (C) 400
    (D) 4000

10. The detrimental effect on organism and water quality with temperature rise of aquatic system is the reduction of __________ of water.
    (A) Dissolved oxygen content
    (B) Biological oxygen demand
    (C) Vapor pressure
    (D) All (a), (b) and (c)

11. The most commonly used chemical coagulant in water treatment is
    (A) Ferrous sulphate
    (B) Alum
    (C) Lime
    (D) Hydrazine

12. Which of the following industries discharge mercury as a pollutant?
    (A) Chloro-alkali industry
    (B) Tanneries
    (C) Beverage plant
    (D) Phosphoric acid plant

13. Which of the following is the most efficient for removal of very finely divided suspended solids and colloidal matter from the polluted water stream?
    (A) Sedimentation tank
    (B) Circular clarifier
    (C) Mechanical flocculation
    (D) Chemical coagulation

14. The Killer gas which caused Bhopal gas tragedy in 1984 was
    (A) Phosgene
    (B) Methyl isocyanate (MIC)
    (C) Carbon monoxide
    (D) Sulphur dioxide

15. TLV of ammonia, nitrogen dioxide and phenol vapor in air is __________ ppm.
    (A) 5
    (B) 100
    (C) 1000
    (D) 2000

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