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


b1000


c 400


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


b Irritation in eyes


cRespiratory trouble


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


bRain


c Green house effect


dVegetation


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


d 15 to 20


View Answer 3 to 6

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


aIndustrial chimney exhaust


b Forest fire


cAutomobiles exhaust


d Photochemical oxidation of organic matter


View Answer Automobiles exhaust

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


a Incineration


bBiological oxidation


cComposting


dNone of these


View Answer Composting

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


aSO2 & SO3


bNO2


cNH3


dCO


View Answer CO

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


a Filtration


bDigestion


c Sedimentation


dBoth B. and C.


View Answer Both B. and C.

High concentration of carcinogenic hydrocarbon pollutants in atmospheric air causes____________________?


aCancer


b Silicosis


cRespiratory disease (e.g., asthma)


d Reduced crop yield


View Answer Cancer

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


aSmog & ozone


bHydrogen fluoride & nitrogen oxides


c Sulphur dioxide & spray of weed killers


d Carbon monoxide


View Answer Carbon monoxide

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