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Chemical Environmental Engineering

Acute danger to human life (i.e. death) exists, if the concentration of CO2 in atmospheric air exceeds ______________ percent (by volume)?

Chemical Environmental Engineering /
Acute danger to human life (i.e. death) exists, if the concentration of CO2 in atmospheric air exceeds ______________ percent (by volume)?

A. 1
B. 3
C. 7
D. 20

Acute danger to human life (i.e. death) exists, if the concentration of CO2 in atmospheric air exceeds ______________ percent (by volume)? Read More »

Chemical Environmental Engineering

The amount of chemical coagulant added for treatment of polluted water ______________ with increase in temperature of the polluted water to be treated?

Chemical Environmental Engineering /
The amount of chemical coagulant added for treatment of polluted water ______________ with increase in temperature of the polluted water to be treated?

A. Decreases
B. Increases
C. Remain constant
D. May increase or decrease; depends on the chemical characteristics of polluted water

The amount of chemical coagulant added for treatment of polluted water ______________ with increase in temperature of the polluted water to be treated? Read More »

Chemical Environmental Engineering

A ‘body’ which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the________________?

Chemical Environmental Engineering /
A ‘body’ which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the________________?

A. Global warming
B. Green house
C. Atmospheric effect
D. Ionosphere

A ‘body’ which allows the short wavelength incoming solar radiation to enter in, but does not allow long wave length outgoing infra red radiation to escape out is called the________________? Read More »

Chemical Environmental Engineering

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

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

A. Smog & ozone
B. Hydrogen fluoride & nitrogen oxides
C. Sulphur dioxide & spray of weed killers
D. Carbon monoxide

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

Chemical Environmental Engineering

Presence of high concentration of ozone and smog in atmospheric air causes the __________________?

Chemical Environmental Engineering /
Presence of high concentration of ozone and smog in atmospheric air causes the __________________?

A. Embrittlement & decrease of folding resistance of paper
B. Cracking of rubber products
C. Fading of dye on textiles
D. Damage of electrical insulator on high tension power line

Presence of high concentration of ozone and smog in atmospheric air causes the __________________? Read More »

Chemical Environmental Engineering