ENVIRONMENTAL ENGINEERING IN CE QUIZ

Most of the atmospheric air pollutants are present in large quantity in

Trophosphere

Stratosphere

Mesosphere

Thermosphere

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Suspended solid present in the waste water generated in blast furnace gas cooling and cleaning plant is removed by

Biological oxygen pond

Radial settling tank (thickener) using coagulant (lime & ferrous sulphate)

Lagoons

Filtration

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Which of the following is an adsorbant used for the removal of SO₂ from gas/air?

Limestone powder or alkalised alumina

Active carbon

Bog iron

Silica gel

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Presence of carbon monoxide in atmosphere produced by decomposition of chlorophyl and haemoglobin breakdown of some animals, beyond TLV (>50 ppm)

Inhances the green house effect

Acts as a green house gas thereby raising earth's temperature

Causes asphyxia

Causes increase in sea level

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Out of the following, TLV of __________ is the minimum (about 0.02 ppm).

Phosgene

Bromine

MIC (methyl iso-cynate)

Ozone

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The maximum CO₂ is emitted into the atmosphere by

Combustion

Urea

Biomass burning

Trees

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Maximum permissible limit of mercury in human blood is __________ micrograms/100 c.c.

82

19

7

1

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Which of the following is a secondary air pollutant?

Nitrogen dioxide

Photochemical smog

Dust particles

Sulphur dioxide

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The common pollutant generated in chlor-alkali industry and battery manufacture is

Brine

Phosphate

None of these

Mercury

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During which of the following operating conditions of an automobile, carbon monoxide content in the exhaust gas is maximum?

Deaccelaration

Idle running

Cruising

Acceleration

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