ENVIRONMENTAL ENGINEERING IN CE QUIZ

Noise produced by cooling fans (employed in air cooled heat exchangers or cooling tower) is mainly caused due to the turbulence created by blade passage through air. It can be reduced by use of a slower fan

Both A & B

Of increased diameter

With greater number of blades

Neither A nor B

TRUE ANSWER : ?
YOUR ANSWER : ?

Which is a secondary air pollutant?

Nitrogen dioxide

Photochemical smog

Dust particles

Sulphur dioxide

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Main pollutants released from iron & steel industry is

SO₃, NO₂ & CO₂

CO, CO₂ & SO₂

CO₂, H₂S & NO₂

H₂S, NO & SO₃

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Smog & ozone

Hydrogen fluoride & nitrogen oxides

Sulphur dioxide & spray of weed killers

Carbon monoxide

TRUE ANSWER : ?
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In the context of the chemical process industries, the term BOD is normally associated with the

Characterisation of liquid effluents

Organic concentration in gaseous effluents

Characterisation of boiler feed water

Characterisation of solid wastes

TRUE ANSWER : ?
YOUR ANSWER : ?

Main pollutant present in automobile exhaust is

Hydrocarbons

NO

CO

CO₂

TRUE ANSWER : ?
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Noise level heard inside a bus in busy city traffic or inside a sub-way train corresponds to about __________ decibels.

95

120

75

140

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YOUR ANSWER : ?

Peroxyacyl nitrate (PAN), a pollutant is found in the

Flue gas of coal based power plant

Exhaust of sulphuric acid plant

Exhaust of nitric acid plant

Automobile exhaust

TRUE ANSWER : ?
YOUR ANSWER : ?

The pH value of oxidised sewage is about

13.4

7.3

1.8

6.2

TRUE ANSWER : ?
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The upper layer of atmosphere is called the

Ionosphere

Stratosphere

Troposphere

None of these

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YOUR ANSWER : ?

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