Chemical Engineering MCQs

Page No. 63

Hazardous/polluting chemical industries should have an ‘exclusion zone’ with a green belt and general public access prohibited around it, covering a radius of _____________ metres?


a100

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b1000

✓


c 400

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d4000

✖


View Answer 1000

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

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b Irritation in eyes

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cRespiratory trouble

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dAll A., B. and C.

✓


View Answer All A., B. and C.

Oceans act as sinks for atmospheric gases including carbon dioxide whose concentration in the atmosphere is increased by the_______________?


aForestation

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bRain

✖


c Green house effect

✓


dVegetation

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View Answer Green house effect

Water filtration rate in a rapid sand filter ranges from ______________ kilolitres/m2/hr?


a0.1 to 1

✖


b3 to 6

✓


c10 to 15

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d 15 to 20

✖


View Answer 3 to 6

Which of the following sources is responsible for maximum air pollution ?


aIndustrial chimney exhaust

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b Forest fire

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cAutomobiles exhaust

✓


d Photochemical oxidation of organic matter

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View Answer Automobiles exhaust

The biological decomposition of organic substances in wastes controlled conditions is called_________________?


a Incineration

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bBiological oxidation

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cComposting

✓


dNone of these

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View Answer Composting

Which of the following pollutants is absent in the emissions from a fertiliser plant ?


aSO2 & SO3

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bNO2

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cNH3

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dCO

✓


View Answer CO

During sewage treatment, the sewage is subjected to ______________ treatment in Imhoff tank?


a Filtration

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bDigestion

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c Sedimentation

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dBoth B. and C.

✓


View Answer Both B. and C.

High concentration of carcinogenic hydrocarbon pollutants in atmospheric air causes____________________?


aCancer

✓


b Silicosis

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cRespiratory disease (e.g., asthma)

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d Reduced crop yield

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View Answer Cancer

Which of the following air pollutants is not toxic to vegetation i.e., doesn’t cause vegetation damage ?


aSmog & ozone

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bHydrogen fluoride & nitrogen oxides

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c Sulphur dioxide & spray of weed killers

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d Carbon monoxide

✓


View Answer Carbon monoxide

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